I've got a K532 in a heavy garden tractor.
The engine has started fouling plugs after or during shutdown. When I pull
the plugs, they have dry, black, carbon seeming residue on them. Looks like
just enough to keep 'em from firing for startup on regular gas.
I can clean 'em with a rag, and give the intake a whiff of ether, and the
old chugger will start right up and run fine.
My guess is the things are running too rich at shutdown. Is this the likely
If so, should I:
1. go to a hotter plug range
2. go to hi-test gas
3. do something else
If the answer is do something else, what is recommended here? (yes, I know
the idea is to find out why it's suddenly running rich on shutdown. It has
a new carb, and it's been shutting down and starting and running fine up
until several weeks ago. I don't have a clue as to what's changed or what to
do with an engine that runs fine. This is where I need help).
I could, of course, just add some TCP or similar octane booster to my
regular, if that would solve the problem.