ORIGINAL: jimmyjames213
ive actually had castor ''wax'' (i think thats the correct term) where it falls out of the methanol soultion into a wakey like substance in the cold clogging the carb but i run 100% castor oil so that shouldnt be an issue for most.
the lighterfluid method works great, as does heating up your engine (i like the blow torch method) or just put a few of those hand warmers by the engine.
for the most part i dont have problems getting engines started in the 20-30's anything below that is harder
My personal temperature limit is low 20's F. but last year, a couple buddies talked me into going out when it was in the low - mid teens.
We had a real hard time getting one engine going...I opened both the high and low speed waayyy up and it was still too lean.
I finally decided to remove the NV assembly, and found a "clot" of white waxy substance...it was stuck in the fuel inlet nipple...
His flight box, with metal gallon fuel can, was sitting on the snowy ground...
Flight box fuel pumps get sluggish in the cold too...