Muffler and environs for mud or other clumps. I'm serious here, if it sat a bit, mice make nests. Had shoulder surgery a few years ago, didn't drive my truck for about 1.5 months. When I started it, it was bogging bad, long story short, mice built a nest in the exhaust pipe, Unraveled a coat hanger and fished part of it out. Revved engine and blew rest out with some cooked micelings. Ran great
Spark plug?
Sounds and feels regular until load. correct?
Can you test compression?
Every kid needs a puppy.If not, help me convince her to get a puppy for the kid to grow up with.
not sure i have the tools to do that. doubt it's in the engine either. just bought it last year.
A year old engine should run like a champ. You're positive you have good gas?
What brand? If you have aluminum cylinders and or piston rings oil is crucial, they get worn/scoured easy