So some quick research is showing if you want to replace the valves and diaphragm in that snow pump, you can run pure meth... the new valve/diaphragm is this one I believe?
http://www.pumpvendor.com/Shurflo_94-390-06.htmlChances are the valve/diaphragm got dissolved enough that its leaking and not able to build pressure so that part will need to be replaced anyway...
Then switch out the lines for braided without plastic fittings and you could be good to go... might be worth looking a Devils Own for fittings and lines...
I would get the pump model and call sureflo just to verify... it could be relatively inexpensive to convert your setup over to support 100 meth..
Good luck with getting them to work warranty with you! If you bought it from them you should be OK. If you purchase it for the less than the MSRP from another reseller they will not honor any warranty.
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