mercruiser compression test results|Compression test on 7.4L, are these numbers ok? : purchasing We had a compression test done and the results are as follows: Cyl 1 - 180. Cyl 2 - 135. Cyl 3 - 0. Cyl 4 - 120. I've browsed through the forums and seen various posts that .
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compression for mercruiser 5.7 alpha 1
"These are the results of the compression test of the 1987 Mercruiser 140 that I am buying for my boat, are they acceptable? cyl.1 dry 165 wet 180 cyl.2 dry 165 wet 180
According to Mercruiser on a cold compression test all cylinders should exceed 100psi and the lowest cylinder should be within 70% of the highest. In your case it is close the . 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 . Did a compression test on my 5.7L 350 mercruiser and I had 175psi across all cylinders accept for one cylinder at 180psi. Is this acceptable?
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Compression test results are these acceptable
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 .
We had a compression test done and the results are as follows: Cyl 1 - 180. Cyl 2 - 135. Cyl 3 - 0. Cyl 4 - 120. I've browsed through the forums and seen various posts that . I did a compression test yesterday and the mechanics results we close to what I got , 180-190 and the 2 low ones. Also picked up a can of Sea-Foam to run thru the carb under . Mercury MerCruiser Sterndrives & Engines. 1990 4.3L LX with 670 hours. D428255. Alpha 1 out drive. Troubleshooting a WOT issue and lack of power. Performed a . The results correlate well with actual gauge readings, and can be completed in a matter of minutes without having to remove any spark plugs. What's more, the analyzer prints .
"These are the results of the "These are the results of the compression test of the 1987 Mercruiser 140 that I am buying for my boat, are they acceptable? cyl.1 dry 165 wet 180 cyl.2 dry 165 wet 180 cyl.3 dry 145 wet 155 cyl.4 dry 150 wet 155 Thanks for your answers, Mike"
Re: Compression Test - compression is to high GTS2134...Get a different mech to do the test if your going to have another test done. Better yet do it yourself.you can rent a tester at most auto stores...Look in the sticky's at the top of this forum and DonS has a.. how to do it. Then post new test results. Did a compression test on my 5.7L 350 mercruiser and I had 175psi across all cylinders accept for one cylinder at 180psi. Is this acceptable? Reactions: javierlopez123. Reply. Upvote 0. split172 Member. Aug 3, 2015 531 . Re: Mercruiser 5.0L EFI Compression Test Pistons and rings are fine. The valve seats are rusted and not seating well. Do a leak down test and listen out the exhaust make sure the cylinder is at TDC or pull the valve lash back when you do the leak down test.
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 Yesterday, I did a compression test to compare the results from before the valve job. Here are the 'before & after' results and fancy graph in the image below. Overall, the compression increased by 9 psi on average, and the low compression in cylinders 3,4,5,6 are corrected. . Mercruiser 7.4L compression test after valve job Today, I ran the . I have a 1992 Mercruiser 454 with 1300 hours. It burns zero oil and seems to run strong, besides an oil pump issue. My mechanic did a compression test and got the below results.
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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.
The compression numbers are as follows: P - 160, 160, 150, 160, 130, 155, 155, 160 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'm considering purchasing a 1989 Wellcraft that has two 7.4 l Mercs. Engines have approx. 850hrs. Starboard motor has average of 120psi from compression test, lowest being 119psi and highest being 125psi. Port motor has average 125psi with lowest being 120psi and highest being 140psi. I can get.
Mercury MerCruiser Sterndrives & Engines . Bi-annual Compression Test - Merc 7.4 MPI . Anyway, here are the results of the one I did in 2018 and this year (2020), the engines have 1,030 hours on them. I also have a couple of questions for the group here . . . . I did a compression test on my engine after I replaced the cyl heads back in . I didnt realize that Im supposed to test the rings using regular motor oil when doing a compression, I used WD40 instead, Cyl 4 jumped to 110 and 3 went to 110 also, none of the other changed when using WD40. I will have to re-check with an oil squirter. Its a '90 stock 454bbc by Hardin Marine 4-bolt. Re: mercruiser 3.0l compression I'm with bruce58. after an engine sets that long it's a waste of time to do a compression test. 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. Start it up, get things moving and freed up and it may be fine. Compression (dry) test results: (conducted multiple times with two different gauges because I didn't believe they could all be 160 myself.) Cylinders 1, 3, 5, 7 were 160, 160, 160, 160 psi respectively . Mercruiser 5.7L Hard to start.Compression test results.Help! Your compression is fine. Mine has been 170-175 in 5.7L vortec, for the .
Looking for some guidance, did a compression test and results were: two at 100, one at 115, and three at 120. The others are 140 and 135. 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. Engine is Mercruiser horizons 6.2 with 224 hours - 2008. here is the test results i would like to know what every one thinks opinions needed please tell me if these readings look normal and acceptable #1 175 psi . Compression test on 1996 mercruiser 5.7 bluewater Mercruiser has a fairly wide tolerance on acceptable compression readings. Many folks look for a greater amount of consistency than the 70%.
How To Do An Engine Compression Test on 3.0L and 3.8L V6 equipped Ford, Mercury and Lincoln. Step by step test instructions. . This article will take you thru' the test and interpretation of the cylinder compression . Dear All, I have a Mercruiser 5.0 MPI Engine. I did a compression test with the left hand Exhaust Manifold and Riser removed, Sea Water Pump removed, Alternator removed, Thermostat housing removed. I removed these items because they was rusted or sezied and need replacing or unsezied or. General Q & A - 502 mag compression test - i'm working on a 99 wellcraft right now with around 250 hours. brought in because it runs hot- only on full throttle. customer wanted to know more about the boat, so i started with a compression test. 7 cylinders were 120psi, +-3. cylinder #5 was at 90 psi. i'm hung up on
Mercury MerCruiser Sterndrives & Engines . Merc 4.3 compression test and non-start issue . (strange, but bad plug). Then I compression test and I get crazy (and concerning) readings: 120, 30, 65, 90, 90, 90 psi. I follow test kit (all sparks out, fuel and spark off, test each port with 3-4 cranks, record highest) but have to do it cold vice . the summer season is over and Ive decided to do a compression test on my engine. Here are the results, what do you think? Warm engine, WOT, DRY TEST: #6 - 170 psi #5 - 145-148 psi #4 - 175 psi #3 - 175 psi #2 - 178 psi #1 - 170 psi I did WET test on #5 (added 5ml - tea spoon of 25W40) and #5 jumped to 162, 165 psi. Here are the plugs: Since I finally got the 470 running the other day, I wanted to do a compression test before it goes back in the boat. I did it today.. results: 1: 145 2: 160 3: 150 4: 160 As far as I can tell, those seem like pretty good numbers. I do wonder why 2 . 5.7 mercruiser Compression-gctid422961. Collapse. X. Collapse. Posts; Latest Activity; Photos . Page of 3. Filter. . I then did another compression test on a cold motor and the results were the same as before: 160ish to 195. . I did a compression test yesterday and the mechanics results we close to what I got , 180-190 and the 2 low ones.
This video shows how to do a compression test on a marine gasoline sterndrive engine. A compression test will tell you if your engine has good compression. An engine is essentially a self-powered [COLOR=blue ! important] . The results correlate well with actual gauge readings, and can be completed in a matter of minutes without having to remove any spark plugs. What's more, the analyzer prints out the results of the .
The engine is a model year 2000 Mercruiser 7.4 Liter with EFI. It seems to run well. Starts every time. Burns very little if any oil. The level hasn't changed in approx. 30 hours of use. . Compression test results I just called Merc.'s consumer hotline and Newport Dave is correct, I was given incorrect info by marina. The number of hours can .
Re: 3.0 L Mercruiser Compression Test Result Question If the numbers were that weak then, they are probably worse now. Based on those numbers, I think it is rebuild time. Plus why are you posting results from 5 years ago, .
Compression test results
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mercruiser compression test results|Compression test on 7.4L, are these numbers ok?