You're not a marine mechanic and you don't want to be one at 6am with water creeping in. The Johnson Cartridge Series pump is built so you never have to pull the whole unit off the hoses to service it. Swap the cartridge, done. Water-cooled motor runs cooler for longer service intervals. Stainless steel SS2343 shaft. Compact all-in-one design that's proven in racing, cruising, sport fishing, and commercial work. No tools. No full disassembly. The pump stays bolted to the boat, you just change the cartridge. Add it to your cart and keep servicing a two-minute job instead of a weekend project