Quick compression question

[mamm7215]

Hi, I tested the compression on my motor but I did it one cylinder at a time with the other spark plugs still in. I've read that you should remove all plugs, THEN do the test. Little confused. Is there that much difference? I got a 120-120-119-120 reading when I did it.
Thanks.
'91 Johnson 90hp V4 Crossfire.

 

[wilde1j]

Re: Quick compression question

Your compression's fine. Most people here remove all plugs, then check each hole w/ plugs out, though.

 

[Boss Hawg]

Re: Quick compression question

Your compression's fine. Most people here remove all plugs, then check each hole w/ plugs out, though.

True-
I do mine one plug out at a time-(just my way)
Readings should be the same (i think) either way

+1 on the good readings

 

[mamm7215]

Re: Quick compression question

Thanks! Yeah I was pretty happy with them but then worried if my procedure was incorrect-would the results be skewed...but good enough, now.
Thanks again!