Anyone who has rebuilt thier fuel pumps with the Winderosa kit from Manufacturer's Supply, please read this!
I've been working on a problem over the last couple of days that I thought was my carbs leaking into the vertiocal cylinder. Turns out, my rebuilt Fuel Pump was at fault.
What happened was that the membrane on vacuum side of the pump ripped. This allowed fuel to flow out of the pump, through the vacuum line and into the intake pipe of the vertical cylinder. This ended up filling up the cylinder, overflowing into the intake and exhaust.
You can see the ripped membrane Here
I spent a couple of days trying to figure out what was up with my carbs, not thinking that my (pretty) recently rebuilt fuel pump may have been the culprit.
Finally, after opening up the pump and realizing what was happening, I called my local Polaris snowmobile shop and picked up an official "Mikuni" rebuild kit. The quality of this kit far outshines the Winderosa, and for $16.99 (retail) it's still a small sum compared to a new pump.
I know a few of you are also seeing this problem starting to crop up. The easiest way to see if this is happening to your bike would probably be to just unplug the vacuum line leading into the Vertical cylinder intake pipe and see if fuel flow out.
I hope this helps some of you. I spent a LOT of time the last few nights pounding my head against the wall trying to figure this out (he!!, almost burned down the garage). Hopefully, I can help someone else from doing the same.
Thanks to Chris, Andy, James and everyone else who helped me out over the last couple of days!!!!
-dj
I've been working on a problem over the last couple of days that I thought was my carbs leaking into the vertiocal cylinder. Turns out, my rebuilt Fuel Pump was at fault.
What happened was that the membrane on vacuum side of the pump ripped. This allowed fuel to flow out of the pump, through the vacuum line and into the intake pipe of the vertical cylinder. This ended up filling up the cylinder, overflowing into the intake and exhaust.
You can see the ripped membrane Here
I spent a couple of days trying to figure out what was up with my carbs, not thinking that my (pretty) recently rebuilt fuel pump may have been the culprit.
Finally, after opening up the pump and realizing what was happening, I called my local Polaris snowmobile shop and picked up an official "Mikuni" rebuild kit. The quality of this kit far outshines the Winderosa, and for $16.99 (retail) it's still a small sum compared to a new pump.
I know a few of you are also seeing this problem starting to crop up. The easiest way to see if this is happening to your bike would probably be to just unplug the vacuum line leading into the Vertical cylinder intake pipe and see if fuel flow out.
I hope this helps some of you. I spent a LOT of time the last few nights pounding my head against the wall trying to figure this out (he!!, almost burned down the garage). Hopefully, I can help someone else from doing the same.
Thanks to Chris, Andy, James and everyone else who helped me out over the last couple of days!!!!
-dj
