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Discussion Starter · #1 ·
Have this engine on a DR brushcutter. Set over the winter. Had stabilizer in it. Only way I can get it to start is dump gas directly thru the air filter into the carb. Then it only runs till the gas I dumped runs out. Like 15 seconds. Have traced gas flow thru filter, thru pump, but at this point will have to completely start a tear down to get to the carb to check gas there. Sounds like carb prob but not at all familiar with this engine. ANYONE ?? have any experiences that could HELP....appreciate any responses...THANKS

2 Posts
Discussion Starter · #2 ·
Guess I will have to answer my own question in hopes it helps someone else in the future. Spent most of yesterday tearing down and troubleshooting the problem. So here is the fix...anyway for me. Went to Kohler website..downloaded PDF service manual. My Kohler engine has the Keihin One-Barrel Carburetor. Quite easy to tell when you look at it. Shut-off Solenoid Assembly is accessable without much tear down..altho I didn't know that and went thru alot more work than necessary. The solonoid sits at the lowest possible location on the carb. It is therefore where all the crud ends up. Mine ended up so crudded up it was not working. I think poor design??? Took it off cleaned it up with carb cleaner and back in business. Here is the service manual info on the Solenoid: page 24 repair manual.
Fuel Shut-off Solenoid
Most carburetors are equipped with a fuel shut-off
solenoid. Solenoid is attached to fuel bowl. Solenoid has
a spring-loaded pin that retracts when 12 volts is applied
to lead, allowing fuel flow to main jet. When current is
removed, pin extends blocking fuel flow.
Below is a simple test, performed with engine off, that
can determine if solenoid is functioning properly:
1. Shut off fuel and remove solenoid from carburetor.
When solenoid is loosened and removed, gas will
leak out of carburetor. Have a container ready to
catch fuel.
2. Wipe tip of solenoid with a shop towel or blow with
compressed air to remove any remaining fuel. Take
solenoid to a location with good ventilation and no
fuel vapors present. You will also need a 12 volt
power source that can be switched on and off.
3. Be sure power source is switched OFF. Connect
positive power source lead to red lead of solenoid.
Connect negative power source lead to solenoid
4. Turn power source ON and observe pin in center of
solenoid. Pin should retract with power ON and
return to its original position with power OFF. Test
several times to verify operation.

Hope this will help anyone that might run into problem !
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