Tanaka TBC-420PF, Service Manual

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Carbon deposits in muffler
Poor cylinder pressure
Power is low or poor Dirty air cleaner element
Incorrect carburetor adjustment
Worn or damaged internal parts
Bad spark plug
Runs inconstantly Bad ignition coil
Incorrect carburetor adjustment
Engine doesn't
run properly Air leak at intake
Air leak from fuel pipe
Doesn't accelerate Lean carburetor adjustment
Clogged fuel filter
Engine isn't warm enough, Warm up engine
Lean carburetor adjustment
Air leak at intake
Engine RPM surging Air leak from pipe
Clogged fuel filter
Broken clutch shoes
Check clutch
Clutch shoes worn out
Cutting attachment Shoes sticking on clutch step bolts
doesn't turn Clutch drum broken or worn out
Check gear case Broken pinion/gear
Broken gear shaft
Check drive shaft
Broken drive shaft or rounded off at spline
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