Originally Posted by
Recycled Flyer
Just wondering if you have excessive carbon build up.
This thought is based on the engine not being new, it having a varied fuel diet and 'if' hot glowing carbon is present it could pre ignite the fuel mix outside of compression parameters.
Good catch there could be carbon in the engine. the engine is not used for over 30 years.it was not turning when I had it , Then I socked in diesel for over 2 to 3 days.
where should I clean the carbon? over the piston and contra piston is enough or should I remove the crank case as well?