McConnel ROBOCUT RC28 Operator's Manual page 46

PROBLEM
Engine misfire
Engine overheating
Engine underpowered
CAUSE
Ignition cable(s) loose
Fuel line clogged / wrong fuel
Water or dirt in fuel line
Air filter dirty / contaminated
Carburettor incorrectly adjusted
Insufficient engine oil
Air cooling system restricted
Air filter dirty / contaminated
Carburettor incorrectly adjusted
Air filter dirty / contaminated
Cylinder head leaking
Low compression
36
REMEDY
Check ignition cables are
securely fitted
Clean fuel line / add fresh fuel
Drain and add fresh clean fuel
Clean / replace filter cartridges
Adjust / tune carburettor
Check level and add engine oil
Clear restrictions
Clean / replace filter cartridges
Adjust / tune carburettor
Clean / replace filter cartridges
Torque head / replace gasket
Engine inspection required