I usually leave the props on my boat during the off season, but this year I sent them back for some massaging. Thus, the splines are exposed to the elements as the boat sits outside. Should I have something covering them?

Just grease her up.

Should have a coating of grease on them anyways at all times.

A little Mercury 2-4-C grease couldn't hurt, or a piece of PCV pipe over the prop shaft is another low cost option.

I've always stored my boat indoors, unheated. I've never had a problem with my nekked shafts. just a little grease on the splines. Pretty high-grade stainless.

I'll add a little more grease on my next visit. Thanks.

I grease them up and slide a 1 1/2 pvc pipe over it.

Hey Waterbum - thanks for the shout out. How's the winter been? Are you blueprinting the hull next year? I'll have to add the pvc pipe when I'm down at New Year's.

Ding-ding! Folks we have a winner.

I'd rather be good looking than so damn smart.