joee20002 Posted January 13, 2010 Report Share Posted January 13, 2010 so i pulled apart my clutch cover and took out the billet pump and found that it was rubbing on the water pump cover and now there are metal shavings in there... so what could be the problem? the plastic gear looks fine... Quote Link to comment Share on other sites More sharing options...
blowit Posted January 13, 2010 Report Share Posted January 13, 2010 so i pulled apart my clutch cover and took out the billet pump and found that it was rubbing on the water pump cover and now there are metal shavings in there... so what could be the problem? the plastic gear looks fine... Are you using a gasket on the pump cover? Even if, there are some wide mfg tolerances in that area from Yamaha so some do rub a bit but excessive rubbing can be an issue. You can help it by grinding off a bit of the tip on the drive shaft that goes into the center case. That typically bottoms out and pushes the impeller outward. Quote Link to comment Share on other sites More sharing options...
blowit Posted January 13, 2010 Report Share Posted January 13, 2010 so i pulled apart my clutch cover and took out the billet pump and found that it was rubbing on the water pump cover and now there are metal shavings in there... so what could be the problem? the plastic gear looks fine... Are you using a gasket on the pump cover? Even if, there are some wide mfg tolerances in that area from Yamaha so some do rub a bit but excessive rubbing can be an issue. You can help it by grinding off a bit of the tip on the drive shaft that goes into the center case. That typically bottoms out and pushes the impeller outward. Quote Link to comment Share on other sites More sharing options...
joee20002 Posted January 13, 2010 Author Report Share Posted January 13, 2010 Are you using a gasket on the pump cover? Even if, there are some wide mfg tolerances in that area from Yamaha so some do rub a bit but excessive rubbing can be an issue. You can help it by grinding off a bit of the tip on the drive shaft that goes into the center case. That typically bottoms out and pushes the impeller outward. yes i using a gasket... and last year it looked fine... Quote Link to comment Share on other sites More sharing options...
AKheathen Posted January 13, 2010 Report Share Posted January 13, 2010 how is your bearing? is the gear pin and/or shaft worn giving excessive play there? Quote Link to comment Share on other sites More sharing options...
Chariot Performance Posted January 14, 2010 Report Share Posted January 14, 2010 Rubbing should not cause shavings here unless the impeller is tightly pressed against the cover. Maybe the pin holding the plastic gear is somehow mislocated or the washer is up tight against the case (inner). Take a straight edge from one side of the side cover to the other. The washer should clear the straight edge. If it does not then you have a serious problem with the impeller setup. If you can't find the problem (should be obvious) then the hole (plastic gear pin) location in relation to the impeller is wrong. Throw it away and buy a different brand if that is so. Jerry Quote Link to comment Share on other sites More sharing options...
joee20002 Posted January 14, 2010 Author Report Share Posted January 14, 2010 Rubbing should not cause shavings here unless the impeller is tightly pressed against the cover. Maybe the pin holding the plastic gear is somehow mislocated or the washer is up tight against the case (inner). Take a straight edge from one side of the side cover to the other. The washer should clear the straight edge. If it does not then you have a serious problem with the impeller setup. If you can't find the problem (should be obvious) then the hole (plastic gear pin) location in relation to the impeller is wrong. Throw it away and buy a different brand if that is so. Jerry i will give that a look thanks guys... Quote Link to comment Share on other sites More sharing options...
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