i haven't run this .40 4-stroke truck in years and a friend of mine has been bugging me to see it run. i have it set very rich because it is the first tank in many years.
http://www.youtube.com/watch?v=Iz70ZgnSjK4
i also have a smaller truck with a 26 4-stroke in it that runs nice too. It sure would be nice to use one of these engine to power an rc dozer but, they spew so much oil...