Take a compression test with motor on ground?

[DamianJP]

Is it possible to take a compression test with the engine on its side, on the ground?
Can it harm the engine?


DamianJP

 

[dew2]

Re: Take a compression test with motor on ground?

I never did it that way I dont think it can hurt anything,BUT why not just stand it up?? put it on the transom,sawhorse anything its not that complicated ?is it??

 

[DamianJP]

Re: Take a compression test with motor on ground?

Thank you Dew

Naw, very simple just wanted to know. I was by myself and didn't want to drop my nut$ tryin' to do it by myself. Figured I'd bang it out right there with no waiting.

I'll just wait abit and check it.


Thanks again,
DamianJP

 

[archcycle]

Re: Take a compression test with motor on ground?

Seems fine. You are just measuring air leakage and I don't think the air cares which direction it's leaking out in.

 

[DamianJP]

Re: Take a compression test with motor on ground?

Well got it checked and Im amazed.

About 160 PSI is both cylinders. Fired right up too. I didn't think they went that high in PSI. And ignition seems all redone and new coils power pack ect. 1976 Evinrude 55HP for $250, sometimes you get a break huh? Still not outta the woods yet with a full check of the motor but stuff seems good.

Thank you for your advise and info.


DamianJP