mercruiser 5.0 mpi compression test|5.0L MPI power loss : department Store Ideally you want to do a compression test on an engine that has been run to normal operating temps and with the ignition disabled, the throttle wide open and the spark .
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Very Low Compessions on Mercruiser 5.0 MPI Engine. with
I am looking at a 2001 boat with a 5.0L EFI Mercruiser engine with 55 hours. Here are the actual compression readings:1: 2102: 2103: 2054: 1905: 2156.Ideally you want to do a compression test on an engine that has been run to .Re: Mercruiser 5.0 compression question. Run away, the engine is gone. 100 is the . I'm looking at buying a 24 foot 2004 deckboat with a Mercruiser 5.0 Bravo 3 (260 HP) that has 715 hours on it. The compression test results were as follows: 141, 149, 131, .
2001 5.0 Mercruiser Alpha carbed in a 22' Stingray. Boat just wasn't running quite right the last two times i had it out. In the slow speed zones (about 1400 rpm) it was surging . Ideally you want to do a compression test on an engine that has been run to normal operating temps and with the ignition disabled, the throttle wide open and the spark .
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Re: Mercruiser 5.0 compression question. Run away, the engine is gone. 100 is the MINIMUM you should see, should be up around 130 to 150. but a leakdown test would be . The best way to do a compression test and a leak-down test, demonstrated on my boat's Mercruiser (Chevy-block) engine. Good demonstration with lots of explanation and helpful tips. Starts-off. 1. You could have a valve train issue and still show good compression. Make sure the cam, pushrods and rockers are ok. 2. You could have good fuel rail pressure with a bad . Merc Service manual for the engine, the manifold pressure seen by a vacuum gauge should be 15 to 21 inches HG at idle. The manifold pressure is reported in absolute .
There are several causes for low compression numbers. Some are expensive to repair; some not so much. Just doing a valve job might not correct the problem. I have a 2002 5.0l mcm Serial #OM336918 471 hours Maintenance kept to the letter. It will not run over 3000rpm We have done the following. Compression test.
This video shows how to do a compression test on a marine gasoline sterndrive engine.Is this good compression on a 9 year old 5.0 Mercruiser? OW062132 claiming to have 50 hours. 145, 150, 140, 145, 145, . I have a 2005 Monterey Montura 194FS with a 5.0 v8 mercruiser mpi. I just had a compression test done on the engine. I. Lawson, T.J. . Mike please scroll up to post 26, that's where I posted the compression test results. I may end up having the leak down test done, but I'm very skeptical that this will fail. Remember, the low 12 in. vacuum is "Steady" at idle, it does not fluctuate. I should also point out, it's 12 in Hg, not 12 psi. 12 in Hg is around 9 psi. hi, i bought 21 beachcraft recently, it has m/c alpha 1 inboard engine. i think i got a pretty deal. i did a compression test. here is the rezult, 150;140;120;120;120;125;120;125. is it still runnable? should i try some seafoam or miracle? thanks
The Mercruiser 5.0 MPI is a widely popular marine engine found in the heart of countless boats worldwide. Designed and manufactured by Mercury Marine, this powerhouse engine boasts a proven track record of performance, reliability, and efficiency. However, like any engine, the Mercruiser 5.0 MPI can have its fair share of problems. In this blog . Top .
I'm having trouble with my 2005 Mercruiser 5.0 MPI engine. when the boat came out of storage this year it would not start at all. I bought 2 new battery's and installed 8 new spark plug's. . I done compression test on all 8 cylinders . all 160psi. Installed new rotor button , cap and new coil. Changed the fuel filter ( cool fuel ) and checked .
It came with a Mercruiser 5.0l MPI Serial OW673826 DOM Nov 2006. Needless to say our first boating experience was not a positive one. The dealer, who will remain nameless at this point, said the boat had been thoroughly inspected and was ready to go. . First up, do your own compression test. This engine is a standard Chevy small block . Mercury MerCruiser Sterndrives & Engines . Acceleration problem 5.0 Mercruiser. Thread starter . They do a compression test claim it needs a motor and its 5000 dollars. Unfortunately way too many boat owners are victimized by by boat shops that don't have good diagnostic techs. After all if a mechanic is good at diagnostic, He or She is not . Mercruiser 4.3 mpi alpha 1.62. Do a compression test and look at the condition of the spark plugs. Reactions: poppagofast. Jul 9, 2024 #3 P. poppagofast New Member. . Since new wires verify firing order, baseline with a compression test, verify ignition timing, check contents of fuel filter- pour into clear jar look for water phase separation .
Mercruiser 5.0L EFI Compression Test
We have an '06 220 sundeck, with a 5.0L MPI Bravo III. Here are the symptoms: Loss of power under load, will not exceed 3600 RPM's Slight vibration at 1500 RPM. Requires some throttle to start, which it never did before. Here is everything I've already done: Compression- good (158-180 psi.) Replaced fuel filter, pump, cooling hose kit, fuel . New to iboats forums and had a question on compression for my 1994 donzi 21 5.7 mercruiser engine. Did compression test and results were 115, 120,110,115,119. but 1 cyclinder tested at only 90. Do i need to have my engine rebuilt? Seems like the engine runs fine but just worried because thought all cylinders should be +/- 10.
2011 Tahoe Q7SSi, 5.0 MPI Mercruiser with less than 5 hrs. Took it out yesterday and it ran great, however after about 3 hrs, an alarm sounded. Single beep every 2 or 3 minutes, (or so). Still running OK, oil pressure looked fine, temp fine, couldn't find an obvious explanation. . He then took it to the lake, ran a complete diagnostic test . Its a Mercruiser 5.0 MPI Alpha. Crank but don’t want to start. I have changed coil, cmp and ckp sensors, distribution cap, fuel pump, fuel regulator, starter, and a whole of parts, but don’t start. . It might be time to check the internal engine components with a compression test and cylinder leak-down test. EDIT: Did you replace the fuel . I have a 2007 Sea Ray 290 with 5.0 MPI's Starboard engine, SN: 1A048083, Family: 7M9XM05.0GME, Bravo 3 outdrives. . 2007 Mercruiser 5.0 MPI, Crank No Start, Scan/Code Reader. Thread starter pfries3; Start date Oct 11, 2021; P. pfries3 . attempted restart and it cranked strong but no start. Batteries test good, fuel pump primes, fuel is . To test for spark which includes intensity and "power level" a spark checking device is best so you can see the spark itself. Many types are available. I like the ones with spark plug wires and a plastic tube with two metal points .
Strangely the Mercruiser service manual only has this spec for compression: Compression Pressure Minimum 100 psi with this note: "minimum recorded compression in any one cylinder should not be less than 70% of the highest recorded cylinder." So if that's really the spec we are well within that. So I don't think a leak down test will help us. I'm really reaching here. I don't know the mercruiser MPI system very well, but assume they took GM's and made minor modifications. wire2 Lieutenant Commander. Joined Jun 25, 2007 Messages 1,584. Sep 16, 2010 . When running diagnostic test on Mercruiser tool and getting to the spark test, the coil delivers a single spark so good.
MerCruiser 5.0 MPI 305 CID Gallons & Liters per hour : Fuel consumption | 260 hp / 260 Horsepower | 0.9 to 18.5 US Gallons per hour | Fuel usage Mercury MerCruisers 3.0 | 4.3 | 5.0 | 5.7 | 6.2 | 7.4 | 8.1 | 8.2 *G = US Gallons per Hour / RPM Select MerCruiser Test Model HP Fuel consumption WOT Boat owner? MerCruiser 3.0 MPI/TKS - 181 cid. 135 .
MerCruiser 5.0 MPI pinging/detonation at higher RPMs. Thread starter badfish29; Start date Mar 16, 2023; 1; 2; . any reading above 150 psi is suspect as that is the spec from mercruiser for a new motor. anything higher means bad gauge or crud in the cylinders post the numbers . Just about the compression test results. Cheap gauge or not . Mercruiser Sterndrive Forum . Merc 5.0l Lack of power no rpm over 3000rpm. Thread . Compression test Good Fuel pressure test good Scanned with diacom no codes all parameters in the game new plugs cap and rotor Replaced the exhaust water shutters Cleaned all debris from exhaust. Gas tank vent clean as well as anti siphon valve Fresh gas no .
I have a 2005 Monterey Montura 194FS with a 5.0 v8 mercruiser mpi. I just had a compression test done on the engine. I. Lawson, T.J. Expert. 104 Satisfied Customers. I have an '03 Sea Ray 225 WE with a Mercruiser Alpha 1 260 horse power. My problem is . Mercruiser 5.0 MPI Won't get onto plane after Top end Rebuild. Thread starter IM Buddy8; Start date Jul 20, 2020; I. IM Buddy8 Seaman Apprentice. Joined Sep 23, 2012 . Did a compression test, got between 165-175 in all cylinders so they are pretty well balanced with what I think is a respectable number. Mercruiser 5.0 MPI intermittent lumpy idle and no throttle response. Thread starter shaunsm_uk; Start date Feb 4, 2018; S. shaunsm_uk Cadet. Joined Nov 22, 2017 Messages 11. . Service involved oil, plugs, compression test 150-155 across all 8, manifold and riser check, B3 bellows and shift cable and a few other minor things
Mercruiser 5.0 compression question
Mercury MerCruiser Sterndrives & Engines . . 2002 Mercruiser 5.0 MPI rich Condition. Thread starter cedarridgeco11; Start date Jul 6, 2022; C. cedarridgeco11 Recruit. Joined Jul 6, 2022 Messages 5. Jul 6, 2022 #1 Hey everyone, I picked up a Stingray boat a few months ago, and have had my first BOAT issue. . Compression is fine, fuel .
Did a compression test, got between 165-175 in all cylinders so they are pretty well balanced with what I think is a respectable number. No weird noises, normal oil pressure, doesn't overheat but lacking power. What could it be? . Not sure but it’s a 2003 boat mercruiser 5.0 MPI with the 48pin ecm. Distributor cap is flat with plug wires .
I have a 2005 searay with a mercuiser 5.0 260hp, bravo 3. After the engine overheated I had the compression tested 1)190 2)240 3)185 4)230 5)190 6)230 7)185 8)220. I am told the readings should be around 150 and the engine needs to be replaced. What would cause a high compression reading? Do. MX 6.2L MPI Mercruiser with 2.2 Bravo III drive. Last Dollar, it’s likely that you have a CF2 fuel pump and vapor lock booster pump. The Cool Fuel 3 (CF3) came out in 2005, and has the paint flake issue that Brite referenced. . Update on my problem. I bought a fuel pressure test gauge and hooked it to the port on the engine. Fuel pressure .
Mercruiser 2004 5.0 Compression Test Advice
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mercruiser 5.0 mpi compression test|5.0L MPI power loss