Run at least 30% or higher fuel (there is boat fuel out there....look around)......... your airboat has an airplane engine (I am assuming)....the SV 27 engine is morelike a car engine made for the water...........which requires a higher nitro content in the fuel....and take care of your fuel.....DONT.....leave it out in the sun to long with the cap of....and when storing it....if you can....indoors...ina dark closet.....get flexshafts from Toyotatruckin....the stock shafts break at the weld......MINE FROM YOTA....STILL GOING STRONG!!!!!!!! and run the40x52/3 Grimracer prop......this is what I am running in this short vid.....at the end...the boat got caught on lilipads.....
check it.......
http://www.youtube.com/watch?v=ElWkcfl0Axg