Propeller shaft bearing cage

noah4009

Petty Officer 1st Class
Joined
Nov 6, 2008
Messages
283
The last part put on to seal the LU that the prop goes on after. It has 2 seals. An O ring and an inner seal.Should I put heavy grease on both or just lube it with LU oil before I put it on?
 

jerryjerry05

Supreme Mariner
Joined
May 7, 2008
Messages
18,074
Re: Propeller shaft bearing cage

Any marine grease or lithium will work.They sell spray lithium that would work well.Jerry
 

Matthew A.

Petty Officer 1st Class
Joined
Jan 24, 2006
Messages
232
Re: Propeller shaft bearing cage

For the most part (at least with Force O.B.'s) always apply a good marine grease to seals. Regardless of whether or not they are new or used. Greased seals (greased seals???) :eek: never mind...will last much longer as jerry pointed out. It also might not hurt to lightly resurface the seal contact area of the prop shaft using 1500 grit or higher wet/dry sand paper. If you choose to do so...do so extremely lightly. The object is not to remove any metal from the surface of the prop shaft as it is to remove any surface glaze that might be on the shaft where the shaft and seal contact eachother.
 

Frank Acampora

Supreme Mariner
Joined
Jan 19, 2007
Messages
12,004
Re: Propeller shaft bearing cage

Slather anti-seize on the two (single exhaust) Oring seals and cage lands. Liberally coat the internal mating surfaces of the gearcase with it also. Helps keep the aluminum from corroding. Use lower unit oil on the internal seal (shaft seal) This seal has two lips. Inner lip keeps oil in and outer lip keeps water out. That's why Merc and OMC use two seals here. That's one reason they are more expensive than Force. At any rate, The inner lip is lubricated by the lower unit oil and the outer by the water against it so you might as well use lower unit oil on it--that's what will displace the grease anyway.

BTW: Anti-seize should NOT be copper based. Grey nickel based is preferable for galvanic potential. NEVER, never, never use graphite on an outboard engine.
 
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