mercruiser 5.0 compression test|Compression Test and Leak : importer Re: Mercruiser 5.0 compression question Run away, the engine is gone. 100 is the . Para pagar com cada uma delas, basta acessar a tela de assinatura da plataforma e selecionar uma das duas opções. Para cartão de débito, os bancos aceitos são .
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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.Re: 5.0 Mercruiser compression readings. If you haven't already done so, replace the .
Re: Mercruiser 5.0 compression question Run away, the engine is gone. 100 is the . 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 . Re: 5.0 Mercruiser compression readings. If you haven't already done so, replace the oil and filter, next I would proceed with the carb work and any other needed tune-up items, .
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, . 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..
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 .
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.
mercruiser 5.0 alpha one compression test
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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 . 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.
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. I'm looking at a boat that has full inboard Mercruiser 350 / 260. (not I/O) I had the compression checked and all cylinders were between 145 and 150. I know the consistency is good just don't know how "good" the numbers are. What does a marine 350 start our life with? The motor is a 1987 with about 890 hours on the clock. 4: if spark is good (jumps 1/2" gap) and the fuel in the tank is good, next I'd do a compression test on each cylinder. 5: if compression is good, spark is good and fuel in the tank is good, then we can conclude we've got a fuel issue.
Captain's reports and/or test numbers for this model are archived. To get full access to this content, please: . Exclusive Mercury MerCruiser service dealer network. Specifications. Type of Engine: Number of Cylinders: 8 Horse Power: 260 Configuration: V-8 Weight: 952.00lbs Mercruiser Sterndrive Forum . Mercruiser 5.0 has fuel, compression and spark but won't start . Yes, you can crank a motor over with enough moisture to kill the spark plugs.Per Chris, a compression test is next. Reply. Post reply Share: Facebook X (Twitter) Reddit Pinterest Tumblr WhatsApp Email Share Link. Home. Forums. Gas Inboard Engines .
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It's 2006 MerCruiser 5.0 MPI serial # OW614502 with 425 hrs -- the boat is Chaparral 290 Signature with Twin 5.0 . The compression test was good, not great -- also on cold engine Keep in mind there was some fogging oil in the cylinders I . Mercruiser, wot only turning 3500 RPMS. Oil pressure is good, Temp is normal. Cranks easy cold or hot and doesn't seem to be missing or or skipping and doesnt backfire through the flame arrester. . Since new wires verify firing order, baseline with a compression test, verify ignition timing, check contents of fuel filter- pour into clear jar . 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 . I also discovered there is water mixed with the oil sump (the engine oil is milky as obtain from the dip stick). Prior to this issue the compression reported 150-180 PSI which is good. Any feedback will be appreciated; I will do another compression test, however form my experiences with motor vehicles the signs are pointing to cracked head gasket.
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. 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 .
Just had a compression test done on a mercruiser 350 5.7 tournament ski EFI. All cylinders checked out around 145 except for the last one #8 back starboard which was only at 35. The boat was sitting for three years. Any suggestions on alternative options then a repower or rebuild? Thanks The 5.0L MPI MerCruiser sterndrive package typically has about 260-hp. . In comparisons like this it is nearly impossible to establish "test lab" conditions because so many factors are different during each test. For that reason, we averaged the numbers for both engines, making sure that the averages were not thrown out of whack by the drive . I'd be doing a compression test on both engines.. U. UgandUb Cadet. Joined Sep 13, 2007 Messages 8. Sep 13, 2007 #6 Re: Mercruiser 5.0 ?? . Mercruiser 5.0 ?? Take if for a test drive before buying--that is a must! Look at that engine compartment for leaks, carb problems etc . firehog6305
The high-flow cylinder head with straighter intake ports and higher compression ration (9.4:1) delivers impressive horsepower. Of the 20 tests conducted by BoatTEST, we looked at six, three 22’ boats with single 5.0 GXi . 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. . I decided to do a compression test on the motor hoping it would give me some piece of mind. Well, now i am scared. Engine warmed up, throttle open. Here's what i got: #1-180 #2-120 #3-180 #4-170 #5-160 #6-140 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. 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 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 .
That will include a compression test and a cylinder leak-down test. The seller should agree to this with no hesitation otherwise walk away. There are several firms that recondition these. Jasper, . If you are considering buying new from Mr Mercruiser, you can use the 6.2L. These are a "stroked" version of the 5.7 small block. At that point .
1993 Mercruiser 7.4L with 135hrs on it. Did a compression test to see what was what, and was surprised to find lowest at 110psi and the highest at 125psi with most at 115-120. These seem pretty low to me, but maybe that is normal for this engine. I was expecting to see around 150 or so.
Since the compression test is dependent upon multiple factors specific to your vehicle (miles, oil viscosity to some degree, maintenance, style driven, etc.) it is more related to consistency among the cylinders. Obviously if one cylinder varies 10-15%from the average of the other 7 readings, then the issue that you are investigating might be . 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. The only thing.
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 about 1/2 inch apart where one lead goes to spark source (coil tower or plug wire) and the other lead goes to ground. I also discovered there is water mixed with the oil sump (the engine oil is milky as obtain from the dip stick). Prior to this issue the compression reported 150-180 PSI which is good. Any feedback will be appreciated; I will do another compression test, however form my experiences with motor vehicles the signs are pointing to cracked head gasket. 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 .
Mercruiser 5.0L EFI Compression Test
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mercruiser 5.0 compression test|Compression Test and Leak