Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
Hunting can be caused by a lack of fuel to the carburetor, or it can be carburetor that needs to be cleaned. I think this is the single cylinder engine, so it is not a miss-firing cylinder. Either fuel stravation, or the governor springs at the carburetor need to be tightened just enough to take any slack out of the springs. Do you have the full model number>
The valves should also be checked for clearance. .004 to 006 inch. Here is carb for engine.
It was r & r, here is the disassembly
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I see question is still open.??