3.0 Throttle Question

[gator fan josh]

Volvo Penta 3.0GSPEFS
SX-M Outdrive

Finally got my boat back from the mechanic after replacing the ignition module and pickup coil. Engine seems to run great, however when I am at idle or fast idle and I try to accelerate slowly to get up on plane the engine speeds up for a short amount of time then goes back to idle. If I mash the throttle down it seems to accelerate good and have plenty of power.
Has anyone seen anything like this? If it helps at all the previous owner replaced the factory carb with a Holley 2BBL carb.

Thanks

 

[insttech1]

Re: 3.0 Throttle Question

http://forums.iboats.com/volvo-pent...oesnt-seem-have-enough-adjustment-498737.html

This is a thread I started about problems with my 3.0 throttle....read thru it....should give you some ideas.

 

[Don S]

Re: 3.0 Throttle Question

If it helps at all the previous owner replaced the factory carb with a Holley 2BBL carb.

Volvo used a Holley carb on your engine. Carburetor Service Kits 3.0GSMEFS, 3.0GSPEFS - 7797476 - Volvo Penta

Your problem sounds like the intermediate circuit in the carb is plugged up, or the carbs out of adjustment.

 

[gator fan josh]

Re: 3.0 Throttle Question

Don,
Thanks for the info, the only reason I think it was replaced is the entire motor is the charcoal color except for the carb is the bright red.


If the intermediate is plugged up, is that something that can be remedied by a good cleaning with something like chemtool, or do you think a rebuild kit is necessary? Is there a difference in a Napa rebuild kit for these carbs vs. a genuine Volvo kit?

On a side note I find it funny that that carburetor is over 1000 bucks through Volvo.

Thanks again

 

[Don S]

Re: 3.0 Throttle Question

A rebuild and a complete cleaning on a carb is the same thing. You disassemble, clean, confirm all passages are clear, and all parts are within specs. To many people think a carb cleaning is just spray some wonder product on it and all will be fine. It never is.

Your EF model engine was the last of the gray engines, from 2001 they went back to red. Volvo used the Holley 2300 carb for 7 ot 8 years with the red engines before moving to the Damon carb. So yes, you have a Volvo carb there.

PS: I don't set prices, just help people fix their problems.