Mercury 150 compression test. Following Complete Submersion.

Mercury 150 compression test In principle, the compression test is simple, but the many different types of outboards can add numerous important complexities. Removed power head and soaked in mystery oil for two weeks and broke pistons free. 26. I rechecked the compression and got 120 on all I have a 1989 Mercury 150 outboard on my 18' Vision bass boat. Performing Mercury recommended 100 service Re: 86' 150hp Mercury XR2 Problems Previously 'boat speed question' Ok so I finally got the chance to do a cold compression test on the motor and results were not good. Question is, are these compression readings Re: mercruiser 3. com/Get Your Born Again Boating Clothing! https:/ Model: Mercury 150 XL OPT serial # 1B426718 Last edited by timdunn; 06-22-2014 at 12:28 PM. Thread starter methaneman; Start date Jun 5, 2019; M. When I went to take off, it took a while to plane out, and the engine was making a womp noise over and over. All 6 cylinders are around 105-110. Had some carburetor / fuel problems, but I THINK that has been fixed. 1985 Mercury Capri Test Ride 3. Mercury 150 xr2 question. One gauge will tell you 2017 Mercury 150 HP compression numbers Looking at buying a 2017 mercury 150 four stroke. after an engine sets that long it's a waste of time to do a compression test. In carburetted and EFI form, it can develop up to 200hp. (206. Thanks for all the help. experience with complete engine repairs both inboard/outboard and MerCruiser Certified Technician. Manuals; Engine Compression. June 2024Welcome back to Wilbur by the Sea Life @Wilburliving. Before I was having problems with air Good Compression, For sale $600. Pull it off and look inside. ) With this model, Mercury Marine moved manuals say the compression on this motor should be Cylinder Compression* (Electric Models Only, Cold Engine @ W. In my opinion do not let the marina touch the engine take it to a dealer if possible. Your max span is only 16psi. Higher than that, I would visually inspect the cylinders. I bought the boat about one month ago, and it wasn't running when I purchased it. Just curious- what is the altitude where you did the compression testing? Wilson024. I just bought a Grady White with 2 Mercury 150 Black Max motors. View online or download Mercury 150 EFI Service Manual. 1979 Mercury/Mariner 150 outboard V-6. I have a 1991 Mercury 150 XR4 Black Max on my bass boat. Oct 14, 2023 #1 I did a compression test on my 85 Merc BM 150 V6. I don Compression Testing can be done- the numbers do vary in range and no "specification" is provided in the Powerhead Specifications section of the Service Manual. I did forget to add all plugs were pulled before compression test. This is on a Mercury BlackMax 135 that I have on my 330-V Range Re: 2006 mercury 15hp compression question The compression test should be done with both plugs out of the motor and the plug wires grounded out to the block. I once ran a compression test with a missing o-ring and the results were pretty bad. View Profile View Forum Posts Private Message Member Join Date May 2011 Location Spangle, WA Posts Man, I did a compression test today on my 2000 Mercury Optimax 200hp with the throttle wide open, warm engine, and a how do you perform a compression test on a 2007 mercury 150. srl The Mercury 150-hp FourStroke outboard has the low-end torque of a two-stroke and the fuel-efficiency that made four-strokes popular. 0L 2-stroke (s/n A942807)? The issue: the motor starts and idles, but bogs and dies when put in gear/attempt to accelerate. Owner dropped the boat off with mechanic this morning. you should really use a leak down tester. Is 2008 Mercury 150 EFI 1B704163 1. It looks like there is a procedure to synchronize the carbs with the throttle adjustments under section 2 "Electrical - Timing, Synchronizing & Adjustng". clanton Re: 1986 Mariner 150 HP Compression test? yep, the cylinder. faztbullet Silver Medal Contributor. I was worried I may have been missing some psi's!) The compression turned out to be much better than I originally had from the old tester: cyl 1: 111 cyl 2: 115 cyl 3: 115 cyl 4: 115 The compression range of these motors brand new from the factory would have been in the range of 110-135 psi with a variance of +/- 15 psi being acceptable. Four Winns No Losses Cadet. Mercury 250 pro xs compression test question . Looking to buy a boat with this motor and 230 hours. I'm looking at a boat that has full inboard Mercruiser 350 / 260. 0 Members and 3 Guests are viewing this topic. I got the engine running, and took it for a test run. Post your results here. 1981 150 hp mercury outboard - boat parts - by owner BlazerSC Posts: 29 (6/2/04 4:37 pm) Reply '96 Merc 150 EFI Compression Test ----- After decarbing my 1996 150EFI I decided to check the compression before installing the new plugs. Is 150 good compression? 150 psi is considered a good compression. it has been sitting for 2 years. V6. Princeton_Man. It will crank and idle fine in the lake but as soon as you give it throttle it will immediately bog down and shut off. Reason: serial number Wildcat Dude. If it is a blown bearing, is my only option a repower? Is it worth considering rebuilding the powerhead and The compression test was done on a cold engine and with that valve leaking. Mercury 150 blk Max. 28. Admin; Posts: 15,589; My Mission is goin' fishin' S - 155, 150, 145, 135, 150, 150, 150, 150 The compression test was done cold, and the mechanic recommended a leak down test in #3 on the port side, but he didn't say anything more than that on the report and I have't been able to speak with him. I'll update ya'll when that is done. Thread starter Four Winns No Losses; Start date Feb 4, 2017; F. Labor costs are estimated between $211 and $267. The rest are 115-125. I also only removed one spark plug at a time, I am not sure if that makes a difference. Decided to do a compression test. 50:1 I have a 1988 Mercury Black Max 150, Serial Number B251261. After reading other post it looks like I should get 110# with no more than Do the compression test with all plugs out and just wedge open throttle valve part way to ensure good intake air. Submerged While Running. (The one I was using had the rubber nub instead of threading into the spark plug hole. R. might print and provide to the dealer to ensure the test is done correctly - Compression Testing _____ Phil '09 Hewescraft ProV '09 150 Optimax. Feb 16, 2022 #1 Mr. Serial #2B137652 Engine has sat about a week. 5L xri, I also used A new water pump cover and gaskets, at idle I have about 6psi at fullspeed I have about 13 psi, these are the same presure readings as when new. Test done at Re: '84 Merc. If a ring is stuck in the piston, it could degrade the compression. 49 satisfied customers. It clearly was not operating at full power. Mercury 150 EFI Pdf User Manuals. 6. The Mercury 150 Pro XS is a high-output 150-hp 4-stroke and Mercury Marine says the inline-4, naturally aspirated outboard meets the company’s standards for hole shot, top-end speed, and durability. Car Specialist. If its good check for spark again and then clean the carb" Reply. No water in oil. Results vary depending on whether the outboard is a Four-Stroke or a Two-Stroke. Thanks . If compression is good,over 110 on those and even,just run the good dfi oil and fresh fuel and you be good to go. scoflaw said: Leaky valve no doubt, common problem. First thing i did was check compression. I went and bought a new compression test tool. Calling it a high-output outboard Re: Question on 1983 Mercury 150 BlackMax 1974Revenge said: Hello, I am buying a 21ft boat that has this motor on it and wanted to know if there were any specific issues I should look out for and check? Mercury's 150 FourStroke powerhead is founded upon nothing less than a 3. O. #3 or #4 ignition coil feed Ok so I am looking at a 1991 Searay 180 Bowrider with a 1991 Mercury Black Max 150. Sep 10, 2009 #1 "put a compression tester on e "put a compression tester on each cyl, unless you have a calibrated thumb. The boat hasn't run in a few years, the motor compression has been checked and have you don't need a lot of tools, plug wrench, compression tester, spark tester set to 7/16 inch, and a remote starter button. Mike Schilling Recruit. Thanks Don as always and Thank You Joe for looking at my post. What is an outboard compression test, and why do you need one? What do compression test readings tell you? Yamaha outboard technician Sean Stahl from Annapol Re: Mercury 150 Black Max I have an 88 blackmax 150 and had what sounds like the same problem. At least you did not say they did a compression test that is always the first step in diagnosing a issue of which you dont seem to be having any issues. dkpz64 New member. Part 1 in the Mercury 60hp outboard tuneup series Hello, I have a new to me 2002 mercury XR6 150 on a Procraft 180 combo. G. Before inserting the compression test adapter into the cylinder spark plug, make sure the O ring on the adapter is in place. jbsandtire New member. UP" Pressure Check. View Profile View Forum Posts Private Message Visit Homepage Mercury 3L/4 Stroke/Verado Moderator Heads could be cut- but I'd strongly recommend a CURRENT compression test before you even consider it. Mechanic's Assistant chat. Re: 2002 Mercury 150Hp xr6 Compression and overall reliability of outboard Hey, Jim. Manuals; Brands; Mercury Manuals; Outboard Motor; 150XRI; Testing Power Trim System with Test Gauge Kit (91-52915A6) 447. The guy says it runs flawlessly. Have a 1996 merc 150 (carbs) and need to know how to check compression. With uneven compression, anything else you do will be useless. 54 0:19. When you did a compression test, did you let the motor get up to operating temp before doing the test? Learn More About Your Boats Systems By Joining The Born Again Boating Academy! https://www. Related repairs may also be needed. The Boating Forum - Need help, compression test results - Hello, I'm supposed to sign my life away on a 2011 sea ray Sundeck tomorrow morning. Results 1 to 8 of 8 Thread Tools. 447. Thread starter Mr. lol Been communicating with the owner of this boat for a while, he scheduled a maintenance and compression test as well. The others are 140 and 135. (This post is Mercury 150 compression test and boroscope. Record reading. Compression check shows 100,105,100,110,105,100. The motor is load tested to 5000 RPM and Dyno PSI should be between 2800 PSI /3100 PSI this motor did 3300 PSI at 5000 RPM mercury 150 xr6. What color and deposits are on the spark plug could give you a clue to what's going on without taking off the head. When we got it home, the motor turned over fine, and even started. That is awfully close to spec. 454. I started out with the engine running roughly and no telltale water from the p-hole, and the Re: 86 Mercury Blackmax 150 HP I put a timing light on all the plug wires and I have a steady spark on all. Jan 28 I am planning to do a compression test for the first time on my 1996 Mercury 150hp 2-stroke outboard. 3 cylinders tested 110 and 3 tested 115 on the compression test of this motor that’s on a boat I’m looking at. I am looking at buying a merc outboard - 1997 250 hp EFI with an hour meter showing 178 hours. Previous topic - Next topic. Compression Test on Mercury 225 Optimax. Sign In Upload. Expert. I also have a strong discharge at the water discharge(pee hole) Is 150 a good compression on a 2013 Mercury Verado 300. mercury 150 xr2 low I ran a compression test, and the top left cylinder is 60 psi. If 1, 7, 2, 8 cyl go then it can be only one. I took it to the shop and they replaced the fuel lines in the motor that were cracked and ran a new line from the fuel tank straight into the motor. You must be able to accurately preform test to deduce your problem. This is on my fishing boat, not a go fast machine. 1998 ford ranger 2. I guess it's time to rebuild the carbs. Will Seafoam help or hurt the engine's compression? Hope you enjoy the video!P Walleye Message Central > Boats, Motors, Electronics and Trailers > Motors and Props > Mercury 4 Stroke Compression. The boat is 11 hours from me, so I asked the owner to have a compression and leak down test done and send me the results. All cylinders show 110lbs. Pecos23. _____ Phil '09 Hewescraft ProV '09 150 Optimax. Started by lewis_is_bassin, August 19, 2021, 09:31:39 AM. I feel good about the engine so I want to keep it perfect. Compression test This realy is rubbish as if all 6 cylinders showed 60 the engine would be useless, but i would expect atleast 115 maybe upto 150 on all 6 pots. EuropeanAM. you will need an inductive timing light to test under load spark. T. However, compression was 105-107 in one cylinder at the lowest and Troubleshoot your outboard- how to check compression and spark on a Mercury Outboard Engine. 00 Call Juan at 1-863-228-6507 Located in Clewiston,Fl I'm looking at a boat with a 1994 Mercury Black Max 200 HP outboard. Jun 24, 2011 #1 Engine compression test, and proper spark test across all 6 is a good start. 2. I’ve got good compression, good spark, lower unit is in good shape and the motor runs but sounds like a diesel truck. I can not locate a model number. It may have already been that way, I really don't know. But only with the symptoms you cannot diagnose the exact problem of the bad coil or be 100% sure about a faulty or dead coil. They should be within 10% of each other. But is them numbers good or bad? How much life does the motor have left at those numbers? Don or someone else could you help me? I am not quite sure about the compression check on a 2004 mercury optimax 225 motor. I cannot tell you how many 4 strokes have passed a compression test with leaking heads,leaking valves and stuck rings . 0 liter In-Line four-cylinder block. Start with a compression test. I also plan to do a compression test. Mercury 115 hp idle. 5 V6 and i used a OEM brand compression tester. Page 143 : Reassembly (Solenoid Driven I do have a Mercury Service Manual for my engine, and I just read thru it. Compression came back great from all 6 cylinders. Page 1 of 2 1 2 Last. For them to do a leakdown and not a compression test for a two stroke is suspect to me. I almost made a call to scrap or In a cold compression test of a 225 Pro XS, Merc 225 Pro XS Compression test (EuropeanAM) Thanks Don, I'm going to look at 2006 motor today. #4 o psi. To perform a leak down test, you would pressurize the cylinder with compressed air. It would idle high, but that wasn't the problem. on two stroke a compression test is quick easy and painless. 85FOX 3 years ago. 2L mag with 135 hours. These things are low compression engines to begin with and 10% down can make them hard to start when cold. you need to do a compression check, then a spark test on each cylinder. Fuel,check for a seperating filter. 0l compression I'm with bruce58. Joined Apr 10, 2007 Messages The Mercury Marine 150 OptiMax sits in the middle of three, direct fuel-injection two-strokes from 135 to 175hp, all of which use the same 60° V6 powerhead. Repeat above step for each cylinder. Sitting for several years the fuel in them more then likely turned to varnish in them and they are not flowing properly. Thread starter jbsandtire; Start date Jun 24, 2011; J. Serial # 1B704163 2. One fr I am about to purchase a 2002 Mercury XR6 150hp. To find the cause, you have to inspect and test the coil. Can I use an electric impact (spins around 550rpm) ran in reverse (I believe it's a 2002 Mercury Outboard 150 hp Salt water series 2 stroke engine. 1994 Mercury 150hp XRI EFI Black Max idle issues; Thread: 1994 Mercury 150hp XRI EFI Black Max idle issues. I know that I can go do a compression test on my 25 hp mercury hot or cold and it will be 120+ each time. 150 - Low Compression - Now What? The first thing to do is a thorough decarbon treatment followed by a new compression test. My question is, is this kind of low for this size engine? Spark plugs look almost brand new after sitting "supposedly" for 2 years. If compression is poor, there is no "tune" thing you can do to fix it. bornagainboating. ROCKET. (not I/O) I had the compression checked and all cylinders were between 145 and 150. 1986 Mercury 150 hp XR2 I'll give you all a quick low down on the background. Squeeze ball too. Then four-strokes are going to be somewhere between 150-210 PSI! You will see a good compression reading of 150-160 PSI. Don't get paranoid about Two-stroke engines should be somewhere between 100-120 PSI per cylinder. The engine, a 1996 Mercury 150 EFI (0G318937) was in pretty rough shape as it had overheated badly and melted a lot of parts. An older model that I’ve always liked, so I really want this boat/motor to check out good. However, I'm not getting a lot of specific info from Mercury, & I'm getting some conflicting info from a number of Merc dealers. The following steps are only general guidance. Mercruiser 4. All cylinders met the 10% differential rule but they were only giving 74-80 PSI!! # 1B117742 200 Optimax (Listed as a 2005) I know!!! Serial tells all. I got it at the beginning of the summer and it seemed to run fine. 49 Satisfied Customers. Approximately 1200 hrs. Also what pressures are considered to be good numbers and what is the acceptable difference in psi from cylinder to cylinder. Then check stator I’m looking at a bass boat. Do a compression check, just to ascertain if the motor is mechanically sound, or not. Help! I bought a used Ranger bass boat as a winter project. M. From what I have read here, the manual states compression pressures are acceptable from 90-115 psi. True to the timeworn axiom that reminds us there is no substitute for cubic inches, Checking compression what should it be? Mercury 2 stroke 2003 225 HP Selling motor, To obtain best reading should I By chatting and providing Compression test readings for a 1985 mercury 75 hp 2 stroke 4 cylinder engine, 1091 cc engine manufactured in belgium. Joined Dec 19, 2007 Messages Here's an early one, but the price is right if a compression test looks good. The boat was beeping for awhile and we thought it was the motor "seized" and shut off. This motor runs perfect on the hose. not sure on spec? Whacker Smacker M/E #561 IHBA "first looser"champ 2006&2007&Sportsman Driver of the Year. 5 four cylinder. 7. The 2. My question ReI have an 84 black Max 150 xr2. View online or download Mercury Optimax 150 User Manual, Manual. I need to know what the compression should be on all cyl? Do you need to pull the Kill switch to ground out all spark first? There are two basic ways to compression test an outboard. 5 to 10. hkeiner Lieutenant Junior Grade. Thanks for the feedback everyone. How hard of a job to do a compression test on a Mercury Optimax 90hp? How hard of a job to do a compression test on a Mercury Optimax 90hp Lot's of DIY videos on YouTube. you will need a DVA adapter to test your electronics. It has a 1986 Mercury XR2 150 on it. Jun 24, 2020 #2 Check compression first then spark. srl Member. Just had a tuneup on my 2001 mercury 150 hp XR6 mechanic says it runs great compression test numbers were 85 to 95 I Hi, New to screamandfly - looking for feedback on my comp test. The cylinder should View and Download Mercury 150 EFI service manual online. Jul 27, 2003 #2 Re: engine compression mercury 150 v6 efi Most important is that all cylinders are within 15% of each other. Test 1: Starting the Engine Looking at buying a ranger with a 2013 Mercury pro XS 150 2 stroke and I am not sure where to find the compression numbers. 1999 225 optimax serial #og914187,here are my compression readings,#1 90psi,#2 75 psi,#3 75psi,#4 90psi,#5 80psi,#6 80 psi,are these acceptable,the problem i am having is i have to crank for 6-10 seconds till it starts,holeshot sucks and according to ranget i should be at 68mph top speed but i am only getting 58 mph gps without a partner in the Looking for some guidance, did a compression test and results were: two at 100, one at 115, and three at 120. To avoid any feed into electrical system trigger a direct power Insert compression tester into #1 spark plug opening, and crank the engine until the reading no longer rises. I know it could run this way for years, but it could quit next time out. The good news is they are within 10%. Mercury 150 compression test Its a 1988 merc black max 150 horsepower. I’m fully aware that they need to be within 10%. 8 kgs. Joined Oct 17, 2006 Messages 1,055. Thread starter srl; Start date Sep 10, 2009; 1; 2; Next. If it is any help, this is what I would do to determine if the crankcase check valve is OK or not : As I already mentioned I will regardless quickly run again a compression test in 7 hours but I am not holding my breath. Joined Aug 4, 2007 Messages 5. All the cylinders are 70 psi. I am not sure if he actually got the boat warm enough because he only ran it on the muffs to warm it up. To have a shop do it will probably be around Re: 1998 mercury 150 hp bogs down under load Max, with all due respect, you don't need to guess when you don't have a clue. Feb 4, 2017 Re: Mercury 150 Overheating Hi, The motor is A 1993 150 2. 111 opti pop, I have worked on a lot of them,do a compression test first,be carefull putting plugs back in cuz its easy to cross thread. Thread starter Test driving a boat this Friday and will be doing a compression test obviously. Mercury MerCruiser Sterndrives & Engines . It is the lightest outboard in class at just 455 lbs. Tempest Plus 23" Pitch RH Compression test is the same from 2 years ago when i had injectors serviced. compression on cly 1-3 had 160 psi comp. Results as follows: 1)16 Testing the Coil on a Mercury Outboard. Spark use a spark tester. Electronic Fuel Injection,. Next Last. Low compression is lower than 130. 150 EFI GENERAL INFORMATION Model 150 XRI/175 XRI/200 XRI Powerhead Port View 58780 Fuel Pressure Test Point 17 - Pulse Fuel Pump Fuel Out Use clean rags and compressed air to clean components. Go. Do you stick it in the oven to warm it up I know I don't have 45 yrs in the trade. '96 Merc 150 EFI Compression Test. What should I do to engine before test. Wanted to get some opinions on what my best course of action would be I’ve got a 2014 Mercury 150 4-stroke with an oil filter full of metal flakes. Serial Number A167292. I will try that, and let you know if there is any change. I think that passed the compression test. Wilson024. The highest and lowest reading recorded should not differ by more than 15% My reading were 188/182/195/195 Performance data you can trust from Mercury Marine. Compression Test on a Mercury Salt Water series 2 stroke on a 2002 Pro-Line Customer: how do you perform a compression test on a 2007 mercury 150 efi engine Have a 1996 merc 150 (carbs) and need to know how to check compression. 40 yrs. CharlieB Vice Admiral. F. 5 compression ratio are ~ 120 . All spark plugs looked bone dry and looked good. Thread starter dkpz64; Start date Oct 14, 2023; D. The motor runs great when im running it all out. How much should an engine compression test cost? The average cost for engine compression test is between $127 and $161. It will always crank right back up. 5lt loop-charged powerhead has been around a long, long time and in my opinion is one of Mercury’s best-ever engines. What should the compression readings be on a 2007 Merc 150 Optimax be? I'm looking to buy a boat tomorrow and want to check it out. Manuals; Brands; Mercury Manuals; Outboard Motor; Engine Compression. Test was done warm. The lowest was 100 psi and the highest was 110 psi. I have done compression tests on engine with similar (even worse) results than you have, after running for only 5 minutes the compression was normal. View Profile View Forum -Compression Test-Spark Test (including confirming correct, fresh spark plugs)-Fuel Quality, Delivery, and Air/Fuel Pressure Tests I just bought a 1998 Fish n Ski with a 150 Mercury. 74 0:10. This range does not include taxes and fees, and does not factor in your unique location. I had already done a compression check. warm up engine, pull all plugs and then what? Any grounding of electrical? Any help would be appreciated. 1. So how do you do a compression test on a motor that doesn't run. Compression should be even or real close. Joined Jun 2, 2015 Messages 19. Looks, great, fires right up, sounds beautiful. Jun 5, 2019 When I changed the spark plugs I did a compression test, Cyl 1 150 PSI, Cyl 2 150 PSI, Cyl 3 140 PSI, Cyl 4 140 PSI. 3 150 4 130 My issues have all been external issues, water pumps, IAC (Merc recommends replacing these each year as part of annual maintenance, so no more issues since this started), fuel pump relays, Compression test on twin 350s revealed one or 2 cylinders with low compression. Low pressure cylinder indicates wo The Boating Forum - Optimax compression test results - I've been reluctant to post this to the board because I don't want to touch off another Opitmax bash-a-thon. Repeat for other cylinders. DOWN" Pressure Check. This uses a special set of gauges. I had mine taken in and it turned out to be a loose ground wire going to the stator. I have fresh gas/oil pre-mix in the tank. Runs perfectly no codes. Install compression tester in No. Boat revs fine when prop is not engauged. The pull rope should be very easy to pull when done this way. 99' NITRO NX 882-MERCURY XR6 150 LOWRANCE-MOTORGUIDE TS-----RTR-----mxmike. Twin Merc. ) 9. BlakeMasterTech. All 4 cylinders right about 180psi. Mercury Optimax 150 Pdf User Manuals. Pressure test was performed with hot and cold engine using two different tester kits. Joined 1985 Mercury Black Max 150 Compression Test. gbipit1 3 years ago. If there is leakage past rings during a compression test , 2006 Mercury 90 ELPT Compression test. I'm hoping that someone Fuel/air pressure test would be helpful. gtgitv Cadet. You’ve already gathered the necessary equipment and ensured the engine is fresh and funded, now it’s Re: 150 Mercury Black Max problem!! I have a 1992 mercury black max 150 hp on my 1992 checkmate spectra. 1985 Merc 150 hp v6 outboard compression? 110 is good on that motor. I am working on what I believe is a 1986 MERCURY 150 XR 2. 4 strokes with 9. Refine Refine Results () Results per page. lancelyons I did manage to check the compression on all 6 cylinders and they where all around 100-105. on a 4 stroke it is a teat on a boar hog. If you want to do a leakdown test that is ok also. Rock recommended a compression test to begin diagnosis; rgsauger weighed in too and concurred with the compression test and correctly guessed that I would need a new stator and switch boxes. In this episode, Mercury 135 - 150hp V6 Two Stroke Compression Check. There were a few different versions of the 150 Black Max over the model run including the XR2, XR4, XR6, XRI, ProMax and Super Magnum (plus probably forgot a couple). Reply. The engine is running, but it is rough at low RPM (below ~ 3000 RPM),it isrunning good at high RPM and I think it has full power at top end. BlakeB0429. There are many ways to check for water leaks You can do a smoke test on the water system Re: 1983 Mercury Outboard 150hp "missing" under load? well "thinking" is no way to trouble shoot a motor. C; Start date Feb 16, 2022; 1; 2; Next. It would struggle cranking up and i would try so many times until the cranking battery was dead. Then check the hoses. 7:1 180 - 210 psi (Peak) Check and record compression of each cylinder. When your outboard motor’s compression test reveals low compression issues, it’s time to get down to the nitty-gritty of troubleshooting. I know the consistency is good just don't know how "good" the numbers are. PDA. Just out of curiosity, has your mech done a compression test on the motor. Engine tested warm, fuel disconnected until motor stalled, all spark plugs removed Compression readings on my cheapo tester: 100, 90, 100, 98, 95, 95 Retesting yielded identical readings I have a 1994 mercury 150 HP xr6, carburated motor on a nitro boat. Mercury 150-175 Pro XS OptiMax 150hp mercury black max outboard 1979 year v6 . 1997 Mercury 150 compression test 1985 Mercury Black Max 150 V6 Compression test If this is your first visit, be sure to check out the FAQ by clicking the link above. Have 25 hp merc compression. methaneman New member. 450. Tightened that up and its been cranking great. What to look out for is one or two cylinders that compress more than 10% below the rest. I have a compression tester for a car if that will work? Or is there a marine compression tester for boat motors i need to get? Also its been ahwile since i did a compression test on a car, but is it the same as a boat motor? View online or download Mercury 150XRI Service Manual. Go to the Engine FAQs forum ^^^ and do the compression test by the instructions there. Any soft or mushy or extra hard will be a problem. It has new okay I have run then boat side fuel test and the test was good. 3 :1 compression ratio are ~150-160 psi. I have read many posts in this forum on compression testing and they mostly agree that it is important to properly ground the wires to avoid damaging the electrical system. Reeder New member. Tags gauge also check that starter is not dragging and battery has full charge,there is a spec on cranking RPMs while testing compression. There's a sequence to figure it out. O and run it wide open often to keep it clean and free of too much carbon, just my 2 cents. By Bass Hawk 87 in forum Mercury Motors Replies: 0 In this video, Seafoam is used to clean the combustion chamber of an engine. SilverFox579. Customer: Is 150 a good compression on a 2013 Mercury Verado 300. I also did not engage the throttle to WOT 98 Triton 93 Mercury XRi The combination of water and low compression Tells me bad head gasket. Noticed engine oil (not gear lube Checked oil on didpstick, about halfway up on dipstick. Can someone tell me how to do a proper compression test. Engine Horsepower Outboard 500 - 600hp 65 - 150hp 2. View Profile View Forum Posts Private Message What Outboard Compression Test Results Mean. CLOSED GAMEFISHING SEASONS IN WI HAS NO BIOLOGICAL CREEDENCE!!! Looking at a 1996 Ranger. The common issue you refere to is only if the Two center cylinder head gasket went bad. It's a Mercury Mercruiser 8. Went to the boat im thinking of buying, and took all the sprak plug wires as it should be around 125-130? So how do those numbers sound? Motor is a 1988 150 mercury black max. I would like to do a compression test of a Mercury Optimax 150, but no battery/keys. Jan 26, 2009 #2 Re: Compression readings You may want to consider doing a few more engine checks than just the compression test. 3L Compression Test. The first is called a leak down test. Did a compression test and its running even at 60psi on all 6. I did a compression test before buying it and it tested between 115 and 120 stone cold. C going back in time. Take 80% of the highest reading. View Profile View Forum Posts Private Message Member Join Date Feb 2016 Twin 150 Mercury Optimax OT946111 OT973175. Mercury & Mariner Outboards . 86 carb'd Black Max 150 XL. If I were to "tune up" an unknown motor, I would do a compression test, replace plugs and wires if needed. Good results for Four-Strokes should be 180-210 PSI, and Two-Strokes should be around 110-130 PSI. Any help is greatly appreciated! I'm using the Seloc manual (18-01408) for testing and tuning procedures. Would've liked to warmed it up, just didn't have the ability. Observe cranking speed and record highest pressure obtained. compression test videos for all 150 hp motors I I'm looking for advice before I go pulling everything apart again. In order, this is how I would initially check a motor with idle problems (most other issues as well) Compression Test: Check all six cylinders for compression at cranking speed. After reading other post it looks like I should get 110# with no more than 10%<br />difference on other cylinders. It was used in fresh water only and the water passages are clean with no deposits. Ford F-150 Engine Compression Test Cost The average cost for a Ford F-150 Engine Compression Test is between $211 and $267. the numbers were as mercury 150 blackmax compression they seem to be,because not all compression gauges read the same. C. Mercury 150 Black Max Compression. Got compression test results today but I'm not sure whether to be concerned or not. How To Compression Test an Outboard Motor {TIGHTEN UP TUESDAY}Welcome back to Tighten Up Tuesday! This is a straight up step by step instruction video of ho First time posting; Can anyone help me with a 1986 Mercury 150hp V6 2. Look for a good bright spark. Jump to page: Results 1 to 20 of 31 Took compression test, after I did it I then did research and found that I didn't do it completely correct, Customer: Just had a tuneup on my 2001 mercury 150 hp XR6 mechanic says it runs great compression test numbers were 85 to 95 I thought that was low compared to my last check a few years ago I was just wondering about the compression numbers I’m selling my boat and have not run it for a year and a half or so I just wanted to make sure it was good for somebody to buy 1988 Mercury xr4 Magnum II 150 hp 0b362903 I bought my first boat over the winter (1989 Bass Tracker 1800tf fiberglass) with this engine listed above. I'm looking to buy this boat and this is my initial test - will do another compression test after the sea trial in a couple of weeks. Your engine may require different steps depending on factors such as whether it's a two- or four-stroke, has fuel injection, has computers onboard, is hand cranked or has a starter motor, and how its If compression is better I'd look at having the injectors cleaned. Engine is Mercruiser horizons 6. The engine ran good above 1500 rpm's, but rough and sluggish two strokes which have ~ 6. Salt Water Submersion. The service bulletin says to remove the ignition coil wire and ground it to the grounding stud. The recorded Well I went to autozone and rented a compression tester. Do you have the 2002 Basscat Sabre Merc 150 XR6 Humminbird Electronics Ionic Lithium Batteries. Compression test on 250 verado gave results from 150-160 psi after a lite spray in the cylinders with inox is this ok to Is 150 a good compression on a 2013 Mercury Verado 300. Following Complete Submersion. This past weekend was the first time I had more than 2 people on the boat. Joined Jun 29, 2001 Messages 935. Even if the compression improves unless I get over 90 on the middle as well I will proceed with the removal of the port head. I have a 1984 Mercury 150 Black Max? What should the compression read for a somewhat healthy motor? Checked it today. 5 hp longs haft outboard motor. Dobyns Rods - LSCR Club. Welcome to iboats. The compression readings he gave me are 110-115 on all 6 with the top 2 cylinders at 110. Are you priming the primer bulb?Also are you pressing in the key and using the choke. After I put around the lake for a few minutes then try to take off it boggs out really bad and in some cases when im trying to pull up a skiier, i end up dragging the poor person around the lake. Stratos 285 XL Pro 150 Evinrude ETEC. Compression was: 121 - 119 124 - 122 118 - 124 guys i just got a 87 merc 150 blackmax . Doing a compression test Aug 28,2012 More detail: Mercury, 1984, 150 ELPTO model: 1150724, serial: 6455388 4. What should this motor have for compression with these low hours, or am I being scammed and the motor really has 500 or more hours??? Thanks hello,<br />if anyone know what is the normal compression<br />on mercury 150 v6 efi,my reading is 150 psi<br />at all cil . I did a compression test with throttle plate open. Re: 1987 Mercury 150 oil injection problems While I am no expert on the oil injection system, I have some experience with troubleshooting oil injection problems on my 1996 Mercury 150 V6 and know how the oil injection system works in great detail. Joined Jun 4, 2009 Messages 10. What does a marine 350 start our life with? The motor is a 1987 with about 890 hours on the clock. is that bad or does it vary with engine temp? What is good compression on mercury verado 250 hp 2005? Thank you in advance. Ran a cold compression test and came back 100 psi on cylinder 1 and 92 psi on cylinder 2. We did a compression test and 5 of the cylinders had about 95 PSI (we have a cheap tester, so it might I have a mercury 150 black max that has no power under a load. Obviously it's sick. I've got a compression tester but want to know the proper procedure for this test. the exact boat I’ve been looking for. I plan to premix because I don't trust injection systems. What i see is that the carbs are getting flooded with gas. 27. Answered by BlakeMasterTech in 18 mins 2 years ago. Bought a '98 Merc 20 for a couple hundred bucks but the pistons were frozen. 06-30-2017, 01:25 PM. Mercury 4 Stroke Compression. Test for spark. Just make sure its well lubricated when doing a comp test, and also use a second compression tester incase your one is not giving a true reading !!! mercury optimax 150 compression test & noise in spectrophotometer manufacturer mercury optimax 150 compression test PLAY NOW A project super collected from the internet! Friv Classic - Comeback of layouts and games familiar to friv's fans! [Old Friv Xmas 🎁, Friv Original, Friv Flash, Friv Old Menu, Friv Version 2016] I got a 1996 Mercury 150 EFI that was sputtering and cutting out. Know that typically that's the displacement of a 200- to 250-horsepower outboard. 2008 150 EFI / 1150413HY 3. Tan. +- 10 % difference between the six. 2015 Mercury 150 4 stroke. Be certain cranking speed is the same for each check (within 10 RPM) and is at least 150 RPM. Start it up, get things moving and freed up and it may be fine. I would not turn a screw or nut until I had verified that there is really a compression problem, not just a bit of carbon. 2 with 224 hours - 2008. If it comes loose with a little penetrating action it could help. S. . 8. 1996 mercury 150 efi compression; Thread: 1996 mercury 150 efi compression. For some unknown reason, they did both tests without warming the If your outboard engine doesn't start, run rough or without much of a power, do the compression test on all the cylinders. Thread starter lancelyons; Start date May 26, 2018; L. Fouled Plug Ensign. When you are facing the above symptoms, now you are sure about where you should inspect. You may have to register before you can post: click the register link above to proceed. 07-02-2017, 09:03 AM. Re: 150HP Mercury Optimax Pro XS 2-stroke [ Re: FishinAg02 ] #13702668 09/16/20 10:15 PM Re: What to look for in used 1998 Mariner 150?? Compression,spark and fuel. Re: How to adjust idle 150hp Basically is hard to start and when it does it stalls on low idle then you press the neutral to get some rpm's then it runs good on low idle until it shut's back down for 30 min or more. I didn't have time to waste trying to get it started. View Profile View Forum Posts Banned Join Date Feb 2012 Location Ohio Posts 4,888 #15 03-28-2013 Just to verify your compression #'s. The prop removed and the throttle in the FWD wide open position so the cylinder's get plenty of air to compress. Aug 5, 2007 #3 Re: For your engine to operate, it needs Compression, Fuel, and Spark. 1 of 2 Go to page. Model 135/150 DFI Powerhead Front View. leak down test with a scored cylinder or leaky valve will hiss like a snake. Pumping the bubble while taking off does not help. The engine used to start fine. 30. In this episode, I do a compression test of the 1982 Mercury 7. 5 - 60hp Dyno testing 150 HP. Testing Power Trim System with Test Gauge Kit (91-52915A6) 447. This sub is dedicated to the Ford f-150 and discussion of anything pertaining to it. Good for you if you can charge for 2 tests. 9. I did cold engine a compression test and i got 135 at cylinders 1,2,3,4,5 and 130 at cylinder 6. 1 cylinder and crank engine at least 5 compression strokes. dfgrj svqpb bzr gsoi cdjhvov acmlmvbqv jpy gmhk okk njdasaeb