Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Is rpm down or it has no power?
Page 26 in the manual link shows the rpm adjustment. And page 28 shows the governor.
If engine is not developing the horse power, then check each cylinder for firing, by removing ne spark plug wire at time while engine is idling. If engine dies when wire is removed, the opposite cylinder is dead. Check for spark and compression.
Does the carburetor still have the electric fule shutoff solenoid? Is it fully opening? It plugs the main jet and can restrict the fule. Is there a full flow of fuel to the carburetor from the fuel pump?
One thing to consider, could the exhaust be restricted? It starts out good, bit gets worse as it runs, that is typical of a plugged exhaust system.??
Does it still have the fuel solenoid in carb? Remove it and take the tip and spring out and try it without it.
It must be working some, or there would be no fuel entering main jet, but for test, I would remove the inner works and try it. It is anti-backfire solenoid whose function is to keep engine from backfiring when key is shutoff hot. It does that by closing off the main jet when power is cut.
Sure, you can, there will be link in your email to get back here.
OK> Good night.