Mercury - Quicksilver Gear Lube Pump Adapter Maintenance Tools Marine-Grade Construction 883704K03. Overview. If you've ever serviced your own lower unit, you know there's something satisfying about doing the job right - clean pump strokes, no stripped threads, no leaks dribbling down the skeg. It's one of those maintenance moments that makes you feel connected to your boat. A simple, reliable adapter turns that task from a headache into an easy routine.. This Mercury Marine part brings that con