Hi all

Apologies for my first post if it's in the wrong section. I am wondering if the crankshaft seals can be replaced on a TY175 with the engine in situ, or is it necessary to split the cases?

Any hints or tips would be gratefully received.

Alan

yes both seals can be changed without splitting the cases. The primary drive side seal is easy because there is a removable sleeve on the shaft. Buy a new O ring that seals the sleeve to the shaft.

For the magneto side I usually use a self tapping screw, or two screws on opposite sides, screwed into the seal and pull carefully on the screw.