Reasonable compression numbers for AQ131A?

[film842]

Although I tested my engine two years ago, I failed to write the compression test results down and so want to do it again.

It seems to me that they ranged in the 140 - 150 range, but am not sure.

Can anyone advise me on what is good and what is bad? Thanks.

 

[Don S]

Re: Reasonable compression numbers for AQ131A?

Go to the link below and download the owners manual. It has that info in it.
Publication search - Publications / Manuals : Volvo Penta

140 to 150 is fine.

 

[jerryjerry05]

Re: Reasonable compression numbers for AQ131A?

The book???? calls for 140-150.
But your guage and mine might read differently.A 10$ guage might not read as good as a $100 set??
Look for results that are the same.
Like all at 120 or 125 etc.
5-10#difference is ok any more than 10#difference there is a problem.

 

[film842]

Re: Reasonable compression numbers for AQ131A?

The book???? calls for 140-150.
But your guage and mine might read differently.A 10$ guage might not read as good as a $100 set??
Look for results that are the same.
Like all at 120 or 125 etc.
5-10#difference is ok any more than 10#difference there is a problem.

Thanks. I did wonder about the possible difference in guages. Well, will be interesting to see what I get.

 

[Don S]

Re: Reasonable compression numbers for AQ131A?

PS: The "Book" if you download it, calls for 142 to 170.