Carb troubles

FrMDL

Cadet
Joined
Feb 24, 2023
Messages
10
My boat stated but would die as I went "full throttle". Actually before I got to "full". I could pump the throttle back and forth really quickly and sort of prime the engine until the throttle was open, although top speed was never achieved and I had to do it every time from idle. I figured carb problems.
I wanted to simply order a new one but this is a 1989 4cyl with the carb base of 3.25 x 2 rather than the ever-so-popular 3.75 x 2. My replacement is a bit pricey (unless someone on here knows where I might find one).
So I went the route of rebuilding it. Now it won't start unless the throttle is open a bit, dies immediately back in neutral (won't idle) and then I noticed white smoke (just a little) coming out of the top of the carb. I immediately shut it off and let the water continue to run. No fire, thank God.
Also, when I was testing all of this it sounded like the carb was gurgling like fuel kept being pushed into it even though everything was off. I even disconnected the fuel line and it kept doing it for about 20 seconds.
 

FrMDL

Cadet
Joined
Feb 24, 2023
Messages
10
Not it won't start at all.
I took the carb off and see fuel (just a veneer) under the carb. I wonder if I'm not just flooding it with gas.
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
70,953
My boat stated but would die as I went "full throttle". Actually before I got to "full". I could pump the throttle back and forth really quickly and sort of prime the engine until the throttle was open, although top speed was never achieved and I had to do it every time from idle. I figured carb problems.
I wanted to simply order a new one but this is a 1989 4cyl with the carb base of 3.25 x 2 rather than the ever-so-popular 3.75 x 2. My replacement is a bit pricey (unless someone on here knows where I might find one).
So I went the route of rebuilding it. Now it won't start unless the throttle is open a bit, dies immediately back in neutral (won't idle) and then I noticed white smoke (just a little) coming out of the top of the carb. I immediately shut it off and let the water continue to run. No fire, thank God.
Also, when I was testing all of this it sounded like the carb was gurgling like fuel kept being pushed into it even though everything was off. I even disconnected the fuel line and it kept doing it for about 20 seconds.
Ayuh,..... Welcome Aboard,...... Unfortunately, you weren't successful,...

Take it back apart, 'n recheck the float level, 'n make use all of the passages are clean,....
You missed a point somewhere,....
 

FrMDL

Cadet
Joined
Feb 24, 2023
Messages
10
You are not wrong. I took The carburetor back apart, and noticed that the gasket was rubbing against the float. So I fixed it, put it all back together, and it is running better than ever. Which I attribute not to me, but to the new spark plugs. The carburetor seems to be working perfectly fine.

I have an early morning rendezvous with the lake. For those who search for carb troubles, pay attention to the float! And thank you, Bondo.
 
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