There wasn't a 50hp built in 1966. There was the old Fat Fifty's built in '58 and '59 and the 50hp twin was re-introduced in 1971. Do you have a model number?
I used the solid threaded inserts to repair spark plug threads. You would need to remove the head and tap to receive the insert. You will need some epoxy on the insert to secure it in the head.
BTW - the 1958/59 Fat fifty is a V4, hence the reference to "Fat"
I used the solid threaded inserts to repair spark plug threads. You would need to remove the head and tap to receive the insert. You will need some epoxy on the insert to secure it in the head.
BTW - the 1958/59 Fat fifty is a V4, hence the reference to "Fat"
