De-carbonizing
 

Doing some maintenance on 30 year old tractor the other day and got to thinking a lot of people new to this hobby complain about their tractors missing or backfiring. Here is a good example of why plug, points, and carb adjustment doesn't always fix the problem.

This is why Kohler recommends de-carbon the head and block and a new head gasket on a regular basis. Some times you wonder how the valves can even close with the build up around them. For an engine to run good you need to bring in a good fuel/air mixture, ignite it and exhaust it and you don't need a build up like this in your way.

https://s25.postimg.cc/yfkj4chof/carbon1.jpg

https://s25.postimg.cc/gqsscq5xb/carbon2.jpg