Yanmar 3gm30f Water Pump Impellers

[smoothsailing]

HUNTER 1997 340

My Yanmar is a fresh water cooling system.


Is there a difference between the fresh water impeller and the raw water impeller or are the both the same?

TIA

Bill

 

[kloudie1]

Bill, the "fresh" water impeller is actually in coolant and is a cast iron impeller kinda like on a car engine. The raw water impeller is the one that pumps water from outside the boat through the heat exchanger and out the exhaust pipe. This is the little impeller with flexible rubber vanes. I believe that the Yanmar part number for the rubber impeller is 124223-42092

 

[smoothsailing]

Bill, the "fresh" water impeller is actually in coolant and is a cast iron impeller kinda like on a car engine. The raw water impeller is the one that pumps water from outside the boat through the heat exchanger and out the exhaust pipe. This is the little impeller with flexible rubber vanes. I believe that the Yanmar part number for the rubber impeller is 124223-42092

Thanks, That was very helpfull

 

[John T1594]

3GM30F Impellers

As noted in another thread, The 30GM30F came with a variety of raw water pumps so make sure you have the correct impeller and gasket for your engine.
http://forums.hunter.sailboatowners.com/showthread.php?t=162208

 

[sailaway78]

Spare

A spare impeller is highly recommended, along with the tools and ability to change same. Couple years ago I had a new Yanmar impeller spin the hub. It had less than 10 hours on it.