Compression check

[DUP1014]

97 fast strike j150gleue
checked compression today the left bank from top to bottom is 90,100,95 the right bank is 100,88,95.do not know if this is good or bad thought you guy's might have an idea where it should be.
Thanks Brian

[Bassmeister]

#3 is within 15% but low, I would try a decarb and recheck.

[TritonAL 186]

Your compression is fine. Variation between cylinders should not exceed 15psi (100kpa). Your highest is at 100 and your lowest at 88. A difference of 12.0 psi.

PS. Did you check your compression with the engine at normal operating temp, not cold ?

[DUP1014]

checked it cold in the garage off the water.Should I check it after it is warmed up?
Thanks Brian

[Bassmeister]

You will get better readings when the engine is warmed up to temp. If still lower by that much I would still decarb and check again, just to prevent sticking rings,if you haven't decarbed in a while or don't run a carbon preventive.JMHO

[DUP1014]

I have been using xd-100 since january do you think I should still decarb?

Brian

[Bassmeister]

The xd-100 will help clean and keep your engine clean, It's what I run in my 03. If it's never been decarbed then it may help. Warm it up and see what #'s are with water of course.

[DoferGofer]

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bassmeister &raquo;</TD></TR><TR><TD CLASS="quote">The xd-100 will help clean and keep your engine clean, It's what I run in my 03. If it's never been decarbed then it may help. Warm it up and see what #'s are with water of course. </TD></TR></TABLE>
If it's never been decarbed or haven't been done in a long time, I am with the Bassmeister, do the decarb. I don't think the XD-100 will actually decarb but, it will help clean and keep any additional carbon from building up so, get her clean and the XD-100 will help you keep her clean.

[DUP1014]

Thanks everybody for the info I will check the readings again with it warmed up and repost.

Brian