I have just purchased a 91 pumped hyper. I currently have 2 Raptor 50's both with hypers and have no problem starting them with a torqmaster 90. The torqmaster will not come close to turning over the 91, (now that you have stopped laughing) what is recommended for starting these? I would like to have a portable starter and have heard the hydratork does not work well. I have been using a 18v dewalt drill on the low speed setting but I know this is probably not a good way to start this engine. Does anyone have suggestions for starting these? I am flying in the 40 and 50 degree temps right now so this doesn't help... Thanks