gappa38 Posted August 17, 2012 Report Share Posted August 17, 2012 I went to put in a new clutch kit today and found the water pump gear shredded. Any reasons this would happen or just worn out brittle gear? Quote Link to comment Share on other sites More sharing options...
ginger Posted August 17, 2012 Report Share Posted August 17, 2012 check that the pump spins freely, if it does than its just the shitty plastic design, i bought the mull engineering aluminum replacement gear today, just do i dont have to worry about it. Quote Link to comment Share on other sites More sharing options...
mike0chek Posted August 17, 2012 Report Share Posted August 17, 2012 their prone to fail over the years. Chariot I beleive or Mull engineering offers a billet one thats right, def gonna be one of my next upgrades Quote Link to comment Share on other sites More sharing options...
gappa38 Posted August 17, 2012 Author Report Share Posted August 17, 2012 check that the pump spins freely, if it does than its just the shitty plastic design, i bought the mull engineering aluminum replacement gear today, just do i dont have to worry about it. It really does not seem that free but I think I'll prob just get new bearing seal and billet gear. Is it worth the extra to get a billet impeller while I'm at it? Quote Link to comment Share on other sites More sharing options...
blowit Posted August 18, 2012 Report Share Posted August 18, 2012 It really does not seem that free but I think I'll prob just get new bearing seal and billet gear. Is it worth the extra to get a billet impeller while I'm at it? Regarding your pump issues, there is usually some drag on the pump due to the shaft seal in contact with the shaft. However, the bearing may have failed as well. If you slowly spin the shaft and feels "catchy" at all, replace the bearing and seal. Regarding the billet pump, since we manufacture the billet gear and pump, I might be biased but IMO, replacement of both the gear and pump is an important upgrade for reliability and protection of todays expensive engine builds. Why yamaha opted for a plastic impeller head is beyond me. They have caused a lot of documented problems over the years. Brandon Mull Engineering Quote Link to comment Share on other sites More sharing options...
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