1992 Bayliner Classic 3.0lX mercruiser

[Ron H.]

Well here it is in a nutshell...on a cold start ( i should say cold no start) the carb will flood out rather quickly. I can open up the choke and see the gas dripping into the carb after each try. The first time it happened I was looking for a gas shut off valve or something because I didn't think it was going to stop. I can get it started after much effort and after it warms up it never happens again...just on a cold start. I was just hoping someone might have some ideas before I get into the carb for a rebuild or re-man. I might add i just purchased this boat from someone who took immaculate care of it but did not use it much in the last couple of years He said the top end was rebuilt about 30hrs. ago but thats all I have...like I said once it warms up it will start right up and run like a top..thank-you

 

[ziggy]

Re: 1992 Bayliner Classic 3.0lX mercruiser

I was just hoping someone might have some ideas before I get into the carb for a rebuild or re-man.

my idea's not to novel. but do you have your service manual available? #10 i'd think. in it is a trouble shooting guide. for rich carb. symptoms. it refers to
warm engine carb. percolation, clogged flame arrestor, auto choke not opening, float adj, float leaks or is saturated w/fuel, needle and seat leaking, carb gaskets leaking, excessive fuel pump pressure, cracked or porous cab body.

sounds like your convinced it's fuel related. but ya might be sure the ign. side of things is good prior to carb rebuilds.

how do you start it when cold? my carbed engine starts pretty much classically. one full stroke of the throttle to set the choke. maybe one more full stroke then set the throttle to maybe 1/3 to 1/2. mine starts almost instantly. yours is way newer, it should do that too i'd think...

 

[Don S]

Re: 1992 Bayliner Classic 3.0lX mercruiser

With the choke closed, the engine vacuum will suck gas out of the carb. That's how carbs work.
Since this boat is new to you, have you ever run a carbed engine before? If not, you need to pump the throttle 1 or 2 times to pump some gas into the engine, then open the throttle around a 1/4 position. Then start it.
A cold engine wil seldom start in the idle position like your EFI car will.