I have ruined engines running them lean in only a few runs. Now what I will buy from your argument is that it would be tough to wear one out running overly rich. Running our motors very rich (2 strokes running near 4 stroke like you state you do) simply wastes tons of fuel (they already do this with no issues BTW) as it does not allow the head temp to get to the proper heat so the fuel combusts properly. This is to assure that the engine is producing the power it is supposed to and that it is ideal for fuel economy and emmissions. Let me take your car for example - it has a computer in it (I am assuming it is less than 10 years old) that controls the mixture. I know I don't have any engines with that much time on them. I remember a great debate from Dave Geirkie (spelling) who said he didn't think many RC engines ever see 100 hours of run time. ![]() Our model engines typically don't get there, because we tend to crash them before they die or we simply don't run them long enough. All engines will wear out if run LONG enough. Really? Never a rod, sleeve or piston, Never a bearing? Those are the parts that wear out. I've been running engines rich for almost 50 years now and I've never been able to wear one out The motor idles like a real aircraft would on the ground purring, fires up easily.after a run.refuel and it fires up quickly. Is 250F reasonable temps on these airplane engines? Should I richen the motor for cooler temps or lean for higher temps than 250F? ![]() The engine seems to be so strong but seems a little to rich.so the high needle was leaned out and the temps climbed and stayed steady at 250F temps at full trhottle.The motor was pulling really hard while I was holding on the aircraft. Anyone who can help would be of many thanks. My low and high speed needles seem to be on par with performance.no dead sticks and plenty of lube.I am just looking for operational temps for max power. I am so used to helicopter fuel tuning.but to change over to airplane engine tuning seems to be a different ball park. I had the engine just under 190 F during it's breaking process with 12.25x3.75 APC prop on a TH uproar 40. Just one gallon on the engine using 15% CP syn fuel.
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