Grease Recommendations

[JS44SDS]

Hi Guys,
I am new to the site and I have a few questions. I am looking for a recommendation on what grease I should use on the following: Shaft log, Rudder Box, rudder bearing, thrust cage bearing? This is a trailered high performance speedboat that is kept in a garage and used primarily in salt water. All of the bearings are new so I would like to start anew with the lube thing and see what the gurus suggest. Should I use a synthetic or.....

Thanks in advance for your help.

Scott

 

[Steve S]

When I had my boat "V drive flat bottom" I used a marine grease .

 

[Ryan00TJ]

I've always used Quicksilver 2-4-C Marine Lubricant w Teflon. Never had a single related problem to the component. If you want to go Synthetic, Amsoil seems to make really good Marine Greases. Check out Quicksilver & Mercrusier too, they have to have some type of synthetic grease for the componets listed above. HTH

 

[JS44SDS]

Thanks for the help.

 

[1 FMF]

read the grease link posted on the bobistheoilguy.com home page.
not familiar with the parts you described, I'm guessing it's a small boat, inboard engine with straight shaft?

for the shaft log, rudder box, rudder bearing, if these are slow moving parts and movement is controlled only by a cable from the helm, then a synthetic grease is really of no benefit. What I think you would need most is a grease that does not wash away nor absorb water. And if it is not a highly loaded or stressed part then you don't need to look for an EP (extreme pressure) grease either which opens you to all options. The best grease i think is aluminum complex, CRC carries it and can be found through bearing supply shops and certain hardware stores. It is the most tacky and water resistant of all greases, cost about $7 tube vs $3 for traditional lithium types.

what is the thrust cage bearing? does it turn the speed of the propeller shaft? does it see the load from the prop? here a synthetic grease may be of benefit. probably a moly-fortified grease would be good, as well as one that's highly water resistant of course. Redline CV grease comes to mind. Most important thing with grease is not the grease properties but the environment the grease is in- is the casing it's in clean and dry, and do the seals keep out dirt and water/moisture? If not, then you'll have problems with any grease.