Hi I'm sorry I just saw this message. You will have to find out who built the block for your Westerbeke. Mine was a Mitsubusi but your might be a Kubota. Once you find that out it is easier to source parts. I know when I got my fresh water pump I found a Vetus for one third the price Westerbeke wanted. That was eight years ago and it is still going strong. Obviously the parts you will find cheaper are the barts that bolt on to the block. I was however able to find a great Heat Exchanger for half price from these guys a company called Mrcool. (I tried to post the link but CF wouldn't let me) it is a .US website

Hello there, Your name came up when I searched for w 46 parts. I wonder if you coulsd help me source parts for my westerbeke. Specifically at the moment raw water pump. I know its a mitsubishi 4dq5 .. but havent found any sources. Would really appreciate any help. Its an o"day 40 btw. Thanks, Rob