Compression Test

[bigvic]

Hello to everyone, I just did a compression test on my 1981 35hp johnson motor and the results where top cylinder110 bottom was 115 and i did warm up the motor before doing the test. Is this pretty good or just ok for this motor. Thanks

 

[F_R]

Re: Compression Test

That's ok. Don't get hung up on precise numbers.

 

[chadpcb]

Re: Compression Test

As long as the compression is with in 10% of each other on all cylinder the motor is fine.

 

[5150abf]

Re: Compression Test

Do a decarb if you haven't , that may bring them up or closer but what you have is fine.

 

[smith009]

Re: Compression Test

I like your question about Compression Test. It is very helpful and interesting for every one who want to know about it. According to me i think that your 1981 35hp Johnson motor compression test is very good, i think that you do not have to be worry about this thing.