Is your Mercury or Mariner outboard running hot? The water pump impeller is often the culprit. This repair kit has everything you need to get the cooling system flowing again. It's designed for a range of 2-stroke Mercury/Mariner engines from 30 to 70 horsepower, including the JET 400, 402, 450, 500, and 700 models, covering 2, 3, and 4-cylinder versions. The kit includes a new impeller and the housing (or wear plate) – the key parts that wear out. It replaces OEM numbers 46-77177A3, and is also equivalent to Sierra 18-3324 and Mallory 9-48312. IMPORTANT: Outboard parts are tricky. Don't just go by the year of your boat. To be 100% sure this fits, you need to check your engine's MODEL NUMBER and SERIAL NUMBER on the nameplate. A quick search with those details will confirm. Doing the impeller is standard maintenance every few years. This kit is a quality replacement that'll help keep your engine cool and running strong all season long. Great for DIY boat owners or mechanics.
