Compression ranges for a Volvo Penta 3.0

[D Warren]

Need to check out psi on a 2006 volvo penta 3.0 , new to me and want to make sure it's right
showing 90 psi on all , thanks in advance

 

[Don S]

Re: Compression ranges for a Volvo Penta 3.0

Minimum is 100, typical for a good engine is around 150.
First of all, I can't believe all 4 are at 90 psi. These engines just aren't that consistant. Are you sure your gauge isn't defective and only goes to 90?

It also takes a fully charged battery, all plugs out, throttle at wide open. and cranking for 5 full puff on each cylinder.

 

[D Warren]

Re: Compression ranges for a Volvo Penta 3.0

Minimum is 100, typical for a good engine is around 150.
First of all, I can't believe all 4 are at 90 psi. These engines just aren't that consistant. Are you sure your gauge isn't defective and only goes to 90?

It also takes a fully charged battery, all plugs out, throttle at wide open. and cranking for 5 full puff on each cylinder.

Thanks didn't have all plugs out and didn't have the the throttle wide open nor turned it over for five full puffs so will retry and thank so much for your help

Ok did all that and got a totally different result they were all over 150 so thank you !

 

[Don S]

Re: Compression ranges for a Volvo Penta 3.0

Great, now what is the problem that caused you to do the compression test to begin with?

 

[D Warren]

Re: Compression ranges for a Volvo Penta 3.0

Great, now what is the problem that caused you to do the compression test to begin with?

Well bought the boat from a dealer and the short of the story is that his claims of servicing the boat turned out to be false, I lost trust. They left old gas in it that I pumped out, Had to tare off the oil filter it was on so tight actually had to take a screw driver and mallet to loosen the filter from the motor, the oil was overfilled, the spark plugs were original and two were oily, so I felt I needed to check out the compression. Any Suggestions, You are most kind to help. Thanks again!

 

[Don S]

Re: Compression ranges for a Volvo Penta 3.0

I would also change the gear lube in the drive, and pull the outdrive and at least grease the coupler splines, check alignment, grease the gimbal bearing and check it for smoothness. That ujoint bellows is also at the end of it's safe useful life. No need to change it right now if there is no water in it, but something to think about this fall during the winterization process.

Do you have an owners manual for your engine/drive? If not, you can download one from Volvo at the link below. There is usually a lot of helpful information in them.
http://www.volvopenta.com/volvopent...lication_search/pages/publication_search.aspx

 

[D Warren]

Re: Compression ranges for a Volvo Penta 3.0

I would also change the gear lube in the drive, and pull the outdrive and at least grease the coupler splines, check alignment, grease the gimbal bearing and check it for smoothness. That ujoint bellows is also at the end of it's safe useful life. No need to change it right now if there is no water in it, but something to think about this fall during the winterization process.

Do you have an owners manual for your engine/drive? If not, you can download one from Volvo at the link below. There is usually a lot of helpful information in them.
http://www.volvopenta.com/volvopent...lication_search/pages/publication_search.aspx

Thanks will become failmular with all of the above , you have enhanced my boating experience.