Dieseling 3.0 mercruiser

[Katiejoe2005]

I have a 1995 3.0 mercruiser LX. I/O. Today after running for several hours we decided to start tubing. After cutting the engine off 3 or 4 times to let kids load and unload on the tube, the engine started dieseling the 4th time and now will not restart at all. I thought maybe the choke was stuck but after messin with it, it seemed to be operational. Idk. I had to be towed in. Now several hours later, it still will not start. Any thoughts?

 

[Bt Doctur]

Re: Dieseling 3.0 mercruiser

Meaning the motor does not spin over and you get a clunk?

 

[Katiejoe2005]

Re: Dieseling 3.0 mercruiser

The motor spinsas normal but just won't fire up. Just cranks and cranks and cranks

 

[Katiejoe2005]

Re: Dieseling 3.0 mercruiser

So after tons of research online my dieseling possibly maybe could be caused by shutting the engine off too quickly after running hard. If that is the case, what would cause it not to restart. 2 days later it still will not start but almost does. Just cranks and cranks. What should I look at? Any help is appreciated.

 

[drunkmonkey]

Re: Dieseling 3.0 mercruiser

Check kill switch happened to my buddies boat. Just shut it down and wouldn't start he went thru the whole thing to find kill switch was bad. Bypassed fired right up just an idea good luck

 

[slothman]

Re: Dieseling 3.0 mercruiser

gotta start with fuel and spark. Pull the spark plug wire from the coil and see if she's sparking good. Pull the fuel pump hose from the carb, crank it , you should see a solid stream pump out...