1992 Volvo 4.3 devepoed fast idle

BrianBarrell

Recruit
Joined
Aug 1, 2016
Messages
2
We took the boat to the lake this weekend. Of course I did all the checks at home first including running it. It ran fine. We took the boat to the lake about 2 hours away. It started fine but has a fast idle about 2000 rpm. The boat will run fine at higher rpms but will not idle down. The throttle cable works freely and is adjusted correctly. This makes it very rough to shift in and out of gear. Anyone have any suggestions that I could try.
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,291
Ayuh,..... Welcome Aboard,..... Is this motor carbed, efi, mpi, Which carb, if a carb,..??..??
 

BrianBarrell

Recruit
Joined
Aug 1, 2016
Messages
2
It is carbed. I do not know which carb it is though. I had a mechanic suggest that it was a vacumn issue and a vacumn hose could have just come loose. there are NO vacumn lines to be seen.
 

bruceb58

Supreme Mariner
Joined
Mar 5, 2006
Messages
30,614
Take off the throttle cable from the carb to make sure its not the helm control holding it open.

I had a mechanic suggest that it was a vacumn issue and a vacumn hose could have just come loose. there are NO vacumn lines to be seen.
Let me guess...not a marine mechanic?
 
Top