Now I'm by no means an amateur when it comes to my nitros, but I've been having trouble with my Genesis. I had it put up for a while, and when I took it out last week, I've noticed that it's sputtering in between 1st and 2nd gear. I've seen videos on youtube with others doing the same thing. At first I thought it was running rich, but I've been experimenting with the needles and I can't seem to get it to stop. I've gotten it close, but still can't get it back to as smooth as I had it before....any suggestions would be appreciated....thanks.

Geeze really? No help?

Its kind of a vague description. Maybe it sounds rich but it is lean and just sounds funny? I ask because those engines are very prone to leaks. Try sealing it. I had to seal the hell out of a new one to get it to run well.

Hmmm...is this the newer .46 or older?   Use fresh fuel.  Try tuning all the way rich and lean.   Tune with the high and low speed needles, maybe the idle needle too. <div>
</div><div>Yeah, an air leakk is always a possible cause for bad performance.  Get gasket sealant from an auto shop or anywhere.  You can seal the back plate, and where the carb connects to the engine (won't hurt engine even if it doesn't help).  Check fuel lines for leaks.  Disconnect hoses from engine and blow air through.  Make sure the glow plug glows real bright and is not damaged.  You will have to use process of elimination.  Of course if it is an old engine maybe the internals are really worn down?</div><div>
</div><div>In my experience nitro engines are very finiky by nature.  Never ran as consistent as a gasoline engine, though perform great.</div><div>
</div><div>I have the newer .46 engine with black cooling head...I have noticed the sputtering sound though didn't notice any effect on performance.  Try messing with the low speed needle, that might make the sound go away.</div>

Hi
Yes - they are intertaining engines to play with !
You could try one thing though: i experienced that my FTLP - fuel tank lid pressure - was much lower than the actual fuel pressure.
I have solved it on several Genesis and Nemesis by simply fitting a rather strong spring ( like 6 mm diameter ) with a metal hook to hold down the fuel tank lid.
Image that your engine is racing away with 30,000 rpm and the fuel tank lid opens sligtly: fuel pressure drops immidiately and engine runs lean - ie dropping rpm at once. When rpm drops, exhaust pressure drops and fuel tank lid close again and engine runs and sounds normal..
Give it a try mate - it dosent cost a lot !
Best regards from Denmark
Niels Vangsoe
www.nitromekanikeren.dk

You can put a one-way check valve/filter system in the fuel line as well to help with fuel tank pressure loss. Its worked for some. OFNA makes the valve/filter.