Those are totally different specs to that of the 900. Once you hit 140+F she starts to sound boggy and will start to ruin plugs typically, this entire year, my sled has seldom seen temperatures above 135*F and ran an average probably somewhere around 125*F. Experience shows the ideal running temperature for it is 126*F. At 110*F it's not running well and hardly burning any gas or oil to speak of (amazing to see a sled run on air). Last year, however, the 900 hit 191*F once, the first time it went above 180*F and it ruined a plug almost immediately (the next time I went to start it it was only running on one cyclinder, by the time it was warmed up it wouldn't run at all; replaced plugs never experienced problem again). The plug looked like new without any damage at all... in fact to this date I don't know which one it was. But once I replaced both plugs (with the originals) all was well.
I know the 900 is different from the 700, in fact the 05 900 is a different game from the 06 900 anyway. But the temperatures on your 700 and the mileage you get is way different from mine. Then again, if the outside temperatures/moisture is different, I find that alters the fuel economy more than the engine temperature except for extreme engine temperatures.
I got my best mileage on the 900 when the temperature outdoors was warm, but when I managed to get the engine temperature down as low as possible (if I could get it bellow 135*F I was doing good).
I dunno, it's possible the 9 is due for a tune up anyway :crazy:
Don't get this information mixed up with the current topic though, the 9 is totally different from the 7, I just wanted to make a comparison.