Engine Service and Coupling Repair

Tonto Marine undertook a routine Yanmar service. Nothing untoward was discovered and the engine was found to be in good order and ran just fine.

It was confirmed that the propellor shaft had moved aft by about 1.5" inches. The cause of this movement was not immediately apparent but when the coupling was dismantled it was found that the locking pin had not been properly installed and was ineffective. Tonto refitted the coupling and added a locking screw so I do not expect a recurrence. Just to make sure I fitted a jubilee clip on the shaft just forward of the stern seal.

The clips we had found loose and removed from the
stripper in Denmark were refitted. These clips had loosened after repeated contact with the locator plate as the shaft moved aft which also explained the noises emanating from the stern.