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

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

Just a thought.

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

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...

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

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