CApTaInGoOfy
Petty Officer 3rd Class
- Joined
- Aug 17, 2015
- Messages
- 91
That water pump drive shaft seal is redundant. The impeller rides against the top of the water pump casting and very little water will get past it to the seal. There is no O ring seal at the top of the drive shaft. If you intend using the engine a lot, the crankshaft, being hardened steel, can rust in the splines cold welding the drive shaft in place--even though it is stainless. Thus: You will want to lightly grease or use anti-seize on the drive shaft splines.--Again, A LIGHT COAT. Too much will pre-load the drive shaft, driving it too far into the lower unit.
I was thinking the impeller might "seal" it in a sense when it is in place. Thanks for the info.