hey spoontang... my 40 runs pretty good. quiet. pushes my boat 31mph and i can slow it all the way down to 2.3mph at an idle. and with a small drift sock i can slow it down to .8-1mph i ran out to b can and trolled for about 8 hours two saturdays ago and the whole trip it only used 4.3 gallons of gas. cant beat that with the high fuel prices