sogood
Petty Officer 1st Class
- Joined
- May 11, 2016
- Messages
- 361
I find it difficult if not impossible to get my revs at idle down to the recommended 650/700 on my 5.7 Mercruiser with a Rochester Quadrajet. I've reduced the throttle idle screw right back off the throttle arm and still it idles at 900+ RPM's.
There are several things I want to do but they all require the engine to idle at the proper speed, so, is there a common/usual reason why an engine might rev too high? Th choke is functioning properly and fully. The air cleaner/ flame arrestor is clean and clear. Would adjusting the timing help? I originally set the static timing using a timing light, but without the idling issue sorted, so could my timing be a little too far advanced or retarded. The ignition is thunderbolt without the need to ground any wires etc.
Any thoughts appreciated.
There are several things I want to do but they all require the engine to idle at the proper speed, so, is there a common/usual reason why an engine might rev too high? Th choke is functioning properly and fully. The air cleaner/ flame arrestor is clean and clear. Would adjusting the timing help? I originally set the static timing using a timing light, but without the idling issue sorted, so could my timing be a little too far advanced or retarded. The ignition is thunderbolt without the need to ground any wires etc.
Any thoughts appreciated.