Westerbeke Raw Water Pump - WB-038445

[Khaos13]

The pump on my Westerbeke W21A is a Johnson pump but it uses studs coming from the engine so you only have to fit the nuts and washers. My engine is actually a Mitsubishi K3D tractor engine so the studs are metric.

[Nicholson58]

My 1983 Westerbeke uses a Sherwood. I have two fortunately as there are no current replacements. They are totally rebuildable and parts are available as they also are for the coolant pumps. Rebuild is about $60 to $100 typically.

[pma_foyl]

There are currently many available Sherwood R10870G pumps. I found them easily at a variety prices ($699 to $991). But still cheaper than buying the SAME pump from Westerbeke for $1265. But you may need to have the mounting foot milled (to match the Westerbeke bracket in my case). That the only difference when ordered from Westerbeke; a slightly modified mounting foot. And there are also rebuild kits available. The real Sherwood kits are fine. I’d recommend avoiding the cheap Chinese kits. The parts were definitely lower quality.

[caffel]

Side note, Re: Water Pump Pulleys.
I took over a boat w a Westerbeke/Mitsu 10K generator last year.
It ate belts at an alarming rate until we resurfaced the three pulleys.
Rust from disuse will abrade the belts, so clean/polish them thoroughly if they've been out of service for more than a few weeks.

C A