Carburetor expertise needed.

Ck111484

Petty Officer 3rd Class
Joined
Apr 12, 2012
Messages
94
My boat carburetor is acting up. It's a Holley 2300 2 barrel mated to a Ford 302 and an OMC Cobra I/O drive.
I had it rebuild about a month ago, but something still isn't right.

The boat ran and idled beautifully most of yesterday (idle is set nice and low at ~625rpm) but when I was on the lake and started it up to go home, it would not run under ~1400rpms. Anything under that and it would stumble and die. I had to immediately goose it in gear to get it not to die and run at over 1400rpms; anything over that is smooth as silk, runs great. Cruised ~35 minutes home @ 3k rpms no problem. Then when I got back to the dock, same thing, sputtered and died under 1400rpms. Makes for an interesting launch ramp approach.

It has acted up like this before, but only while warm; I went to go try and troubleshoot it today and it will not run under 1400rpms again even while cold (on muffs).

The entire ignition system is new, it's got a new water/fuel separator, and I checked to make sure the fuel pump is good. I really think it's a carb issue.


I'm buying a rebuild kit and (re)rebuilding it tonight; what should I look for in particular that could be causing these symptoms? Anything specific? What would cause low RPM issues?

ANY advice would be GREATLY appreciated.
Thanks.
 

888

Petty Officer 1st Class
Joined
Jan 7, 2012
Messages
358
Re: Carburetor expertise needed.

Choke open fully?
 

cr2k

Captain
Joined
Mar 19, 2009
Messages
3,730
Re: Carburetor expertise needed.

Sounds like the what happens when the power valve blows. Replace with high altitude or marine.
 
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