F-80 Fuel problems

[garyleemitchell]

I am having issues with my 2002 F-80. I ran fine to the pier. The next morning it wouldn't crank. I used starter fluid and it would crank until the fluid was consumed. By pass the fuel lines and connected straight to the fuel pump, same thing happened. Fuel filter is clear. Could this be the prime starter assembly?

[almetelo]

clean carbs (must be dismantled) and re-sync them with 4 way vacuum gauges, clean fuel lines, filters...
Check fuel pump.
If this dont work check compression, spark and timing

[greasyshaft]

You should have battery voltage at the thermoelectric valves when the engine is running. Pull them and put them directly to 12v they should both extend very slowly, compare the lengths of the two, should be the same fully closed and extended.
Unlikely the problem unless they are stuck in the fully extended position.
Problem is likely in the carbs/fuel pump as stated by almetelo but you are best to check spark and compression before undertaking such a job.
When an engine is cranking the starter is engaging and turning the flywheel.
Your engine is cranking but not firing/starting.

[garyleemitchell]

Greasyshaft, Yea I miss spoke on the crank/starting. It will crank but not start. It will start with starter fluid and will run as long as I keep spraying, that's why I was thinking fuel delivery issue. I will check compression. spark and timing, never hurts to check those. New fuel line and filter, fuel pump pumping but have not checked pressure on it. I will check the Prime starter with the 12 volt I think that's and easy place to start.


Thanks Almetelo and Greasyshaft!

[greasyshaft]

The thermoelectric valves will only cause hard starting if they are stuck extended which I doubt.
More than likely your carbs are the problem and need a good soaking.

[Marc Kruse]

The chances that all 4 carbs failed at once is slim unless to got a bad load of Gas.
I would drain the carb float bowls in to a clear container and see what comes out.

[TownsendsFJR1300]

Pull the drain bolts on the carbs and see if fuel comes out.


Please read this thread, especially post #11 to trouble shoot the Primstart assm;

http://www.yamahaoutboardparts.com/f...t-th23921.html


What country are you in BTW?