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