Kohler engine

[Stanley OByerly]

I have an eight horse power Kohler engine on a garden tractor,that starts and runs good, but the muffler glows cherry red in a short time. Why?
 

[joe csuti]

If eng has point ign system,check point gap & ign timing,also check that flywheel key not bent/sheared regardless if point/12v coil,point/magneto or solid state ign.

Other possible causes,hi-speed needle set too rich & unburned gas burning in muffler,restricted muffler due to carbon buildup or loose/broken baffles in muffler.

To check/set ign timing if you don't have eng manual goto link below & download service manual for your mod# eng,ign timing setting/service usually in section 8 of manuals.
kohler

 

[El Toro]

Your carburetor may be set too lean. Hal
 

[Phil B.]

Sticking exhaust valve, or bad valve seat.
 

[FredinMO]

clean and reset points to .020. the points have closed up also check the points plunger for wear on both ends.