Engine compression

[Tkosleded]

Just wondering what the std compression should be like
It's a 2004 5.7 indmar 5.7 is this ok
1-175, 2,3-180 4,5-190 and the last 3 are at 200
Just wondering if this is normal or something to be concerned about the boat only hAs 150 hrs


From mooseknuckle sledding lodge

[papou]

Did you check the comp with all the plugs removed so the engine cranks freely ?

[Tkosleded]

I had z dealer do it


From mooseknuckle sledding lodge

[mmandley]

Just wondering what the std compression should be like
It's a 2004 5.7 indmar 5.7 is this ok
1-175, 2,3-180 4,5-190 and the last 3 are at 200
Just wondering if this is normal or something to be concerned about the boat only hAs 150 hrs


From mooseknuckle sledding lodge

You need more info to know if its good or not.
You need to know what the compression ratio for the engine is.
It could be 9.0-1, 10.0 to 1, or any number. Knowing that you will be able to see if 175-200 is a good number.

Generally you want them all to be with in 10% of each other.
Just looking at your numbers cylinder 1 is 175 and 8 is 200. That's 11% difference between all cylinders.

Just going by that I would say your engine is in good health and wouldn't worry about it.

[Tkosleded]

Thanks


From mooseknuckle sledding lodge

[james yarosz]

The number doesn't mean much as all compression gauges read different numbers according to the brand.The difference in cylinders is the important part. #1 cylinder is a hair low but as mmandely said I wouldn,t worry about it.