O-Ring on drive shaft

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Posted by Terry Blalock ( on September 29, 2004 at 17:05:44:

When you are replacing the waterpump(1975 Johnson 50 hp), the shop manual says to replace the drive shaft O-ring, but doesn't say where it goes. When I took the lower unit off, the O-ring was just floating half way down the shaft. Does it go at the top of the shaft or in the water pump boot and what does it do?

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