[Carey856]

Hello (new guy here)

I have a 48" Scag with the Kawasaki fc420v engine
and im having a problem with keeping it running

It will start up great when its sat overnight and runs really good until it gets up to operating tempature then it dies and will not restart until sitting for quite a while...4-5 hours

I have already tried replacing spark plugs, and
the main coil .......still exactly the same as it was

any Ideas

thanks alot
Craig

 

[Mowingman]

Yoy might be getting a vapor lock condition. Gravely and Kawasaki did a factory bullitin on the routing of the fuel line on some Gravely machines with the same symptoms. See if your fuel line is routed near areas that might get pretty hot.

 

[Carey856]

okay will do

I forgot to add this I checked for spark after replacing coil


when its at a cool temperature its showing spark

when it gets to operating temp it looses its spark?????


could the ignitor/ (thing bolted to the side of the engine) be the problem?????

 

[Restrorob]

okay will do

I forgot to add this I checked for spark after replacing coil

when its at a cool temperature its showing spark

when it gets to operating temp it looses its spark?????

could the ignitor/ (thing bolted to the side of the engine) be the problem?????

That would be the next step since the coil has been replaced.

 

[jeepman_in_mo]

I have a Scag walk behind with the Kawi fc420v engine. Mine is doing the exact same thing. I also replaced the coil. After i did it ran for about 15 mins and now it wont restart. i checked the kill switch wire to make sure it wasnt frayed. It's not.

Any ideas fellas?
thanks in advance, Wade

 

[Restrorob]

I have a Scag walk behind with the Kawi fc420v engine. Mine is doing the exact same thing. I also replaced the coil. After i did it ran for about 15 mins and now it wont restart. i checked the kill switch wire to make sure it wasnt frayed. It's not.

Any ideas fellas?
thanks in advance, Wade

Are you sure it's not sparking ? what did you set the coil to flywheel air gap at ? It should be 0.12 in. If so you may have a bad igniter also.

 

[barnard]

Sounds like possibly valve clearance is too tight.Check valve clearances with engine cold.

 

[barnard]

Did you ever find the problem?

 

[MBDiagMan]

Since you have eliminate the coil it sounds to me like it is running too rich like a stuck choke or messed up float and needle/seat if that carburetor is equipped with one.

Good luck,
Doc