My magnum 16 - as cheap as it was is going to either be replaced or rebuilt over the winter.
It knocks and smokes - and I can't see in the bore through the plug hole for carbon - it's so coked up. It does start and work though, so might be worth saving.
Head gasket is on order - then I can pull the head and clean it, also maybe see if the bore is shot - pretty certain the oil rings are and maybe the piston - and possibly rod are gone...
Anyone know of a UK distributor/dealer that does a fair price on Kohler parts? Import gets expensive from the US