impeller

  1. KZW

    Engine Cooling Water not Flowing

    Need help. My boat is no longer huffing with the engine (Universal M25 XPB) running (i.e. cooling water is not being expelled). There is a distinct sound when water is flowing through the system. That sound isn't there. It sounds like the seacock is closed (it isn't). When the water exhaust port...
  2. R

    Proper impeller for Universal M-12 diesel

    I have a 1984 M-12 diesel in my Oday 28 I think that motor came w either a Sherwood or an Oberdorfer pump. Are the impellers compatible? The Sherwood impeller is part num 287439 Impeller 302875 for Oberdorfer Any idea where to find these and are they the same? The Sherwood impeller has...
  3. R

    Fresh Water Impeller Replacement Cycle and Challenge finding the part

    I have an M-12 two-cylinder 10 HP Universal Diesel inboard motor in my 1984 ODay 28. I replaced the fresh water pump 4 years ago. I replace the sea water impeller every year. I went to order a replacement impeller (301339) for the fresh water pump (UNV-301336). I'm told that is an obsolete...
  4. RoyS

    Impeller Woes

    Have a 40 year old Yanmar 2QM15. Sometime in the past a P.O. converted this salt water cooled engine to fresh water with the addition of a second pump and a heat exchanger in a kit sold by Sendur. I now have two largely inaccessible water pumps belt driven on my engine. I change the impellers...
  5. tfox2069

    Hunter 36 remove bottom stair for impeller and belt changes

    So I've seen another closed thread on this subject, which never solved this problem beyond angled tools or ratchets, mirrors, and lots of dropped tiny screws into the nether regions of the boat. I’ve managed to resolve it, and thought I’d share the fruits of a 6 hour effort. Problem: Changing...
  6. J

    Inboard raw water not pumping out of back overheating

    Checked impeller and its not damaged. Diesel engine overheating and raw water is not exiting back of boat. No antifreeze or coolant. What now?
  7. dkerphunter

    Raw Water Flow Reduced After Impeller Change

    Hello, I just changed the impeller and gasket in the raw water pump on our Yanmar 3GM30F. Before the service the raw water flow was great in terms of volume and frequency. After the service, it decreased to a trickle with lower frequency. There's a clear clear "before and after", leading to...
  8. S

    Yanmar 4JH3 Raw Water Pump Impeller

    Has anyone else used the relocation kit by [SeaSpaceMarine.com] to relocate their raw-water pump? My daughter's boat requires lifting the engine and removing the pump completely just to check the impeller. So instead of repeating this process every year, I am thinking of relocating the pump now...
  9. S

    Yanmar 4JH3 Raw Water Pump Impeller

    Has anyone else used the relocation kit by [SeaSpaceMarine.com] to relocate their raw-water pump? My daughter's boat requires lifting the engine and removing the pump completely just to check the impeller. So instead of repeating this process every year, I am thinking of relocating the pump now...