Compression on Johnson 90Hp. what do you think...

[stingraymax]

I am looking to buy a used outboard and found an interesting one but I have no idea on these numbers. Please advise.<br />1999 Johnson V4 60° 90Hp.<br />compression cold 135-145psi<br />compression hot 120-130psi<br /><br />Is this engine still ok or what should be replaced to have it in perfect condition again ? (new pistons)<br /><br />Thanks in advance.<br />Stef

 

[JB]

Re: Compression on Johnson 90Hp. what do you think...

If those numbers are the range for all 4 cylinders the compression is excellent in that engine.<br /><br />Before you buy it, remove the bottom (drain) plug from the gearcase and be sure there isn't water in there.<br /><br />Good luck.

 

[jokeman88]

Re: Compression on Johnson 90Hp. what do you think...

My mechanic told me mine was 120, and it was very good, my motor is a 1987