the piped setup I am using -leaves speks of black -always - I squirt a little gas on a rag -it wipes off
as for power - what is being missed by some here is that the ignition engine and the pumper carb keep the engine working thru all kinds of power on and low idle flailing about -
at 2 lbs with 7 ozs added for ignition and small battery -it is -for me a far better setup than any comparable weight glow
My piped ST2300's would run with it-and then some - but needed 18-ozs fuel(25% nitro 20% oil) They beat any of the Moki / OS etc setups for power and weight
But I need 10 ozs fuel gas - and this makes total weight about a wash. and starting is far easier and more simple -- switch on - flip - fly -
I am right on 9.5 lbs as shown.
Nitro /alky fuels will always beat gasoline for max power ----if the setups are other wise equal - both piped correctly etc.. The hooker is more than double the amount of fuel is needed .