Thread: Marine Grease, is it ok to use?

I use it on everything and have for a long time. Pat

Depends on the soap/thickener used.

Firstly, is it the right grade (thickness) ?

It will have an NLGI # on it somehwere.
Most chassis greases are an NLGI #2 grease.

Most general purpose chassis greases are lithium or lithium complex soaps, the better marine greases use a calcium sulfonate base/thickener which resists corrosion much better and is almost impervious to water washout however....
....it may not be compatible with a lithium base grease.

My charts say it may be ok, but you'd really want to purge all the old grease out first when changing over otherwise you may have a reaction.

Personally I prefer a grease with moly (molybdenum disulphide, MoS2) in it at between 3 and 5% in the sliding splines and ball joints.

It has been said that moly shouldn't be used in needle rollers (uni's) (potential skidding problem) but I've always used it there too and my uni's last a loooong time.
I've used good old Castrol LMM for chassis lubing for well over twenty five years and it's never let me down.
Not exotic but good stuff.

CAT market some brilliant chassis lubes that are moly fortified (5%) and are calcium sulfonate thickened. (like a marine grease)
I'd use them if i coould find them, they are very, very good.

My favourite marine grease ATM is marketed by Lubrimatic. It has an excellent Timken OK load rating and is a calcium sulfonate thickened grease. You should be able to pick it up at a boat shop.