Vacuum Leak?Or what?
 

Ok I'm stumped. I put my boat away last year and I though I had a small vacuum leak. 750 Holley would idle high(1000rpm) and when I put it into gear it wants to die so I have to feather the throttle to get the rpms back up. Well, I put the boat in the water for the first time and it was still idling high so I sprayed carb cleaner around the base gasket and all around the intake trying to locate a leak and found nothing. Could this be a possible accelerator pump problem? Or am I on the wrong track. The engine runs under a load above idle. The other engine goes in and out of gear with no variation. Thanks for the help
Josh

Re: Vacuum Leak?Or what?
 

Possibly,
The secondaries aren't totally
closing ????

Just a thought.

Re: Vacuum Leak?Or what?
 

I checked the secondaries, the are fully closed. Even though it wants to stall when I put it into gear when in nuetral there is no hesitation when I run the rpms up. Everything else seems fine. Wierd, I think I will swap carbs and see if the problem follows the carb.
Thanks

Re: Vacuum Leak?Or what?
 

Josh-Just curious,but it sounds like this problem started last season. Did you do anything just before you had the problem? It definitely could be a vacuum leak somewhere. First thing I'd is put a vaccum guage on it. I don't think it's the accelerator pump. A motor with a vacuum leak will typically run normally at WOT (wide open throttle) when the power valve is open. The accelerator pump just richens up the transition from off-idle to WOT. Could be a lot of things, but I'd start with checking vacuum and for good measure make sure initial timing and total advance are what they should be. For what i's worth...

Re: Vacuum Leak?Or what?
 

Could be a vacuum leak in the carb too. Throttle shafts, choke vent, etc.
Gary

Re: Vacuum Leak?Or what?
 

Thanks Guys, it sure seems like a vacuum leak to me also. I will hook a guage on to see whats up. It's a real biotch around tight docks:D