looking for a good engine..

[jokerjustin]

i was looking over the engine in my truggy and the only thing that worries me is that my pull start is almost hitting the rear hinge pin retainer. im not sure if other engines are longer. i think it is a .18 engine but its not marked at all
are the mounting holes universal in terms of spacing? i was looking at a few on ebay but i dont know if different size engines use diff spacing.