force 150 intermittent running

[ron150]

I have a 1994 150 hp Force that starts quickly and runs for 10 to 15 seconds, then shuts down. I can start it many times and it repeats the shutdown. It will go into gear and drive the boat for the 10 to 15 seconds , then quit.
I have had three mechanics clean carburetors (3 times), and there is no change to the operation. One mechanic believes that there is an electrical problem, but does not have manual, or knowledge to check out if it is the stator, trigger or even the electrical module.

Can anyone shed some light on this problem? I am thinking of just replacing the motor with a newer model Evinrude 135 hp or similar, but hate to spend the money.

Thanks for any help you can send my way.

Ron

 

[jerryjerry05]

Re: force 150 intermittent running

What are your starting procures.What does it take to get it restarted?Does it re-start easily?
You have 2 fuel pumps. Rebuild both.Any soft hoses?Replace them.
Replace ALL of the fuel line.Squeezie too.There any inline quick disconects? Remove and replace with a solid piece of hose,or replace with new.I always remove and throw them away.That's another piece that can go bad. You check for water in the system?
Get inline spark testers.2 should be enough.Install them, then keep the cover off and go for a ride.Watch the sparkies as it runs out of fuel.See if they have spark as it quits.Soon as it dies turn it over and check for spark.
Does it die even when you run it with the cover off? Do these thing and get back.J

 

[michwolf]

Re: force 150 intermittent running

First of all,FIRE your mechanic.Have you checked the fuel pump?Its not that hard to do.

 

[TimberwolfFXDL]

Re: force 150 intermittent running

Sounds to me like a heat related issue. If it were a car with an electric fuel pump I'd be looking at that first. Next I'd be looking at the ignition system, specifically the coil and ignition module.

The steps above should point you in the right direction. An inline fuel pressure gauge wouldn't be a bad investment either. Between the spark testers and fuel gauge you'll be able to tell which one is failing.

Remember, your engine needs three things, and three things only: Air, fuel, and spark. Let one fail, and it won't run.