Originally Posted by zixxer

it can be too much fuel in the crank case ...remove glow plug turn upside down to see if there is an excess of fuel ...also on roto starts the one bearing in the mechanism on the back plate of the motor can get gummed up ..fix for that is to remove back plate pull out one way bearing clean it good and reinstall ...thats about all i can think of ,,but it been a while since i ran a roto start ....down the road try and pick up a bump start back plate maybe a used starter box ..and you will prolly need the kit motor mount as well ...hope that helps