I got my recently purchased 1952 TN 5hp running enough to hear a rubbing problem in the recoil. I removed it while the engine was running and all was quiet with the engine. On further investigation I notice one of the 3 cogs that engage the engine mounted piece that turns the motor over was missing. The part that holds it in was still there so someone must have removed the broken piece, but it seems by the witness marks on the remaining two that they are rubbing on the flywheel mounted piece they engage with to start the motor. Any suggestions on what the problem may be or where I can find parts to fix this problem?