i have a hg and trying to figure out what motor it has :-\ best description i can give is its a 4 cylinder gas water pump on top pulley distributor and oil filter and i think its called a governor on the the right hand side down draft carb and exhaust on the left side starter is center in front of battery box. Not sure if this is original motor or not but it looks like it is. i got the axle and oil back in every thing works perfect thanks for all the helpful replies
A picture would help. Sounds unusual.
I have seen this same set-up on two OC3s. At least I vividly recall the rear mounted starter. Reckon from memory its a Massey-Harris conversion, but just cannot be certain.