Is a water seal around the main shaft on the water pump housing on a Yamaha 100 outboard motor?
I just took the impeller out and it looks like molten junk in the housing around where the shaft goes through it. I know a damper water seal is under two screws on the housing. But is water held back with a seal going up the long shaft? Or is the impeller up against the insert cartridge so tight the water will not get around the shaft?