Originally Posted by crapshooter

years ago before surface drive was the go , all shafts were underwater and there were really no issues with water intake . you might get a few drops but nothing that will wet anything , as mentioned you should grease up the shaft plus you can also put a short length of heat shrink over the shaft tube and over the flex shaft. what i mean in this is place a length of say 1 inch piece of heat shrink over the shaft at motor end then put the flex or solid shaft in then slide the heat shrink up so half is on the brass tube and half is on the shaft then apply some heat with a soldering iron to make a seal, the shaft will still turn freely with the heat shrink over it jst make sure it has some grease or oil on it.