Mercury - 2-4-C Marine Grease with PTFE Multi-Purpose Marine Lubricant 14 oz Cartridge 8M0190471. Overview. If you've spent enough time around boats, you know the moments that stick with you aren't always the big ones-sometimes it's that quiet satisfaction when everything on the boat moves exactly the way it should. The steering wheel turns without hesitation. The throttle glides instead of grabbing. The hardware stays quiet and cooperative, even after a long day in rough chop. That kind of reli