did i read somewhere that if you dont isolate the fp from the tunnel it will ice up?i thought the article said to put some foam under it?anybody know?
progold
New member
This is an easy mod and your fuel pump will never freeze up again,just take off the two nuts that hold the fuel pump into place and add a few washers over the studs to raise the fuel pump off the tunnel,or make a spacer out of rubber either one will to the trick ,i used the washers myself solved the problem never froze up again.
do you think most srx owners do this?
progold
New member
I dont know about the srx owners but i own a viper and i think the fuel pumps are in the same place and it is a common mod what happens is that when you are running youe sled through the day your front heat exchanger will keep that part af the tunnel a little warm and if you stop during the night or the temperture drops it will cause any moister under the fuel pump to freeze because the fuel pump is mounted right on the tunnel that is where this mod comes in ,like i said before do this before the season starts it`s easy to do if you are not sure check in the teck session for step by step.
akrievins
New member
was this fixed from the factory on the 03 and up Vipers?
Good info in the Tech Pages . . .
Many of the fuel pumps built for the Viper have a vent hole in the bottom. Melted snow (water) can easily pool in this vent hole with the pump mounted on the tunnel and be drawn into the vent of the pump where it freezes when the sled is shut off for a while (cold temps). This alledgedly caused the pump to not work properly. Yamaha issued a memo (I forget if it became an official bulletin) that advised dealers to silicone off this vent hole. The stock Viper did not require the higher volumes of fuel that the vent allowed anyway.
I do believe that there is a letter in the Tech Update for '03 or '04 that discusses a factory solution.
I personally feel that there was actually a slight defect in manufacturing (out-sourced) that allowed the affected runs of pumps to freeze. I feel that it had to do with machining and debris from machining in the pump housing and outlets.
In any case, lifting the pump off the tunnel (washers) or sealing off the vent hole (silicone or plug) both seemed to alleviate the problem. I did both back in 2002 and have run 8000+ miles since without the problem repeating itself.
Pouring hot water on the pump during cold startup worked too, but I think it compounded the problem during the next cold startup.
Many of the fuel pumps built for the Viper have a vent hole in the bottom. Melted snow (water) can easily pool in this vent hole with the pump mounted on the tunnel and be drawn into the vent of the pump where it freezes when the sled is shut off for a while (cold temps). This alledgedly caused the pump to not work properly. Yamaha issued a memo (I forget if it became an official bulletin) that advised dealers to silicone off this vent hole. The stock Viper did not require the higher volumes of fuel that the vent allowed anyway.
I do believe that there is a letter in the Tech Update for '03 or '04 that discusses a factory solution.
I personally feel that there was actually a slight defect in manufacturing (out-sourced) that allowed the affected runs of pumps to freeze. I feel that it had to do with machining and debris from machining in the pump housing and outlets.
In any case, lifting the pump off the tunnel (washers) or sealing off the vent hole (silicone or plug) both seemed to alleviate the problem. I did both back in 2002 and have run 8000+ miles since without the problem repeating itself.
Pouring hot water on the pump during cold startup worked too, but I think it compounded the problem during the next cold startup.
wow good info thanks guys!!!i ended up putting some close cell insulation under it.hopefully that will do the job!
liveride777
New member
so this seems like a stupid question but in order to get to the pump im going to have to pull the tank correct? whats the easiest way to get at the pump.
thanks
thanks
no not the tank.on my srx if you remove the airbox,the pump is right under there.i dont have a viper so im not sure where it is on those.
progold
New member
It`s the same same thing for the viper ,i removed the air box clutch cover and secondary clutch made the job a lot easier gives you more room to work,if you check in the tech section of this forum there is great instructions and pictures on how to do this mod this is where i got my info to do this mod.
Be sure to get the airbox boots back on the carbs right. Don't want no burndowns.