Universal M25 XPB with Yanmar Raw Water Pump?

[rah138]

Hi,

I have a Universal M25 XPB and the water pump">raw water pump stopped working. The prongs on the cam that turned my water pump are destroyed and so now I either need to mount a pulley driven water pump and tear down the engine and install a new cam shaft. I'm leaning towards mounting a pulley driven system and purchased a Yanmar 2GM raw water pump but not sure how or where to mount it. Has anyone done this before? Can you take pictures of how you mounted it?

Thanks!
Ryan

[Jim van Cleve]

Originally Posted by rah138

Hi,

I have a Universal M25 XPB and the raw water pump stopped working. The prongs on the cam that turned my water pump are destroyed and so now I either need to mount a pulley driven water pump and tear down the engine and install a new cam shaft. I'm leaning towards mounting a pulley driven system and purchased a Yanmar 2GM raw water pump but not sure how or where to mount it. Has anyone done this before? Can you take pictures of how you mounted it?

Thanks!
Ryan

Ryan, I had the same, broken fork issue on the M25XPB, in my 1968 Pearson 35.
I installed a crankshaft driven Jabsco pump on the front of the existing sheave and plated off the hole where the original raw water pump was. A moderate amount of drilling and tapping was required but nothing extreme. This was 8 yrs
and about 1000 engine hours ago and it’s been flawless. Good luck with your project.

[Lepke]

You could use a 12v pump that has a good flow.