Help Please;;;;;;
A guy gave me 3 engines. I do not know how to tell between the 28cc & the other size engine. All 3 seem to have the same stroke of about 29mm & piston dia of 32mm, 2 have cylinder cast the same so as you can use socket & extension to remove cylinder, other one has fins cast over bolts with small hole to get to cylinder bolts. Spark plug is angled into the head, not straight up & down.
Any help would be great.
Cheers.