5.7L V8 Mercruiser (CARB) will not start

Hello,

I have a 1998 Maxum SR2300 with a 5.7L V8 Mercruiser (CARB).

The other day pulling into the Marina I was shifting back and forth between Rev and Fwd and it stalled. I dont know if this event is related at all, but I have not been able to get it to run since.

The day before this issue, I replaced the Fuel Water Seperator and changed out the oil and ran it for a couple hours. But now when I turn the key it sounds like it wants to fire but it never does (except I get small puffs of exhaust).

There is about a 1/4 of a tank a gas and I am getting fuel into the CARB when I push down the throttle. I pulled off the fuel water seperator and dumped the gas into a glass jar, but could not identifiy any odor or seperation. I replaced the spark plugs and I am getting spark to them.


If any one has any suggestions or comments I would greatly appreciate it.

Thank you for your time.

Re: 5.7L V8 Mercruiser (CARB) will not start

Get a couple ounces of gas and pour it down the carb and see if it fires off.

I've run into a couple of boats that were ALL water and only the slightest amount of gas in the clear container. Made it look like it was all gas.

Re: 5.7L V8 Mercruiser (CARB) will not start

It could be your shift delay switch has gone bad. I believe they are all spring loaded. Anyway follow your shift cable to the carb area ( or there abouts ) and with someone moving the throttle - engine and ignition OFF - look and see if that mechanism isn't making full contact - or that it's not stuck.
Don, do you think that also might be the culprit?

Re: 5.7L V8 Mercruiser (CARB) will not start

gcboat said:

Don, do you think that also might be the culprit?

Click to expand...

I doubt it. He says he has spark. If the shift interrupt switch was stuck closed, it wouldn't have any spark. That is what that switch does is stops the spark.