ponda,

Some parts may be interchangeable with another engine or you might want to have it repaired by an engine guru.

Some ST engines used bearings especially machined for only ST. I would contact Boca Bearings and see if something is available. They used to have a LOT of sizes for model engines, and a well informed staff. I assume that is still true. You may have to disassemble it and supply measurements.

Wow! This thread was started three years ago. Time flies.

George