Originally Posted by kchace
I believe grease labeled as "Marine Corrosion control and Trailer wheel bearing grease" would be a good choice. Typically "Red" grease. It sounds like what has been used by the PO.
One thing you must be careful of when changing grease types is mixing different types of grease "bases". Some types of greases are not compatible with others. Look up "Grease compatibility chart".
A few clips on greases:
Aluminum complex greases are truly waterproof.
Lithium, lithium complex, calcium sulfonate, calcium complex, and bentone based greases are not waterproof.
Calcium complex typesare good at resistance, but the aluminum based are the only water proof greases in the bunch.
Be aware of age hardening after 2-3 years, so cycle new grease in accordingly.
Also look at the grease. If a moly grease looks gritty/sandy and not mirror-like when wiped with your finger, the moly is not fine enough to work as a backstop lubricant.
In all cases, oil is the main lubricant, making up 75-95% of the grease by volume.
None are compatible with each other long term., so where possible, clean old mystery grease out first.
Bentone (clay) greases do not play well with any others with immediate degradation on mixing.