"I ave a yanmar ysb 12, single
"I ave a yanmar ysb 12, single cyl, (1977) that leaks water out of the scupper in the shaft housing. Replaced water and oil seal. There is a gap between the bearing washer and the water seal. What keeps the oil seal secured to the back of the impellar housing (negative pressure?) I am on the hard and am using fresh water hose. Still leaking water from the scupper. Am I using to high pressure from the water hose ? Impellar working well and shaft not damaged"
"I ave a yanmar ysb 12, single cyl, (1977) that leaks water out of the scupper in the shaft housing. Replaced water and oil seal. There is a gap between the bearing washer and the water seal. What keeps the oil seal secured to the back of the impellar housing (negative pressure?) I am on the hard and am using fresh water hose. Still leaking water from the scupper. Am I using to high pressure from the water hose ? Impellar working well and shaft not damaged"