Marine grease
My favorite marine grease is mystic JT6 l used to use it on my snowmobiles now I use it on my outboards, I tried the synthetics (mobile one) I didn't like the way it dripped out of my greaseguns when it was warm. They carry mystic at cal ranch, but they don't always have the marine specific tubes, I use the high pressure on my backhoe and it really stays in place, the marine grease is blue. Last tube I bought was around $4 way less the the Yamaha stuff,