Bayliner18
New member
I have a 1974 OMC 120 h.p. with the usual or inherent faulty upper shaft. Every 200 hours, like clock work, they corrode and then strip out. They also destroy the upper splines of the water pump shaft, as well. (Always in pairs.) I have been working on a permanent solution for this. It involves reworking a used water pump shaft (free) with a good set of lower splines. I am doing 3 of these and it works out to about $500 each in machine work. The cost of both shafts and seals can add up to the same (not including labor). Since they could last 1000 hours or more (30 years) then they will pay for themselves.
Here is a picture and a drawing for those who are interested in doing the same. I can supply better pictures if you wish to email me.
[email protected]
Here is a picture and a drawing for those who are interested in doing the same. I can supply better pictures if you wish to email me.
[email protected]
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