ORIGINAL: Konrad
Good position about the ''Made in America''.
I'm concerned that if this engine has a broken lug, and that there may be some distortion in the crankcase. This can case extra drag and often results in sealing problems with the crankshaft and crankcase. Now I fear that the most likely damage is that if this engine was crashed ( broken lug) that the low speed needle might has been jammed into the low speed metering orifice (found in the spray bar) If this has happened the damaged low speed fuel orifice will not allow for proper mid range operation.
I'm concerned about the 1/2 turn low speed needle setting. I suspect that this is still too tight and might be your fuel restriction at full throttle. Is this 1/2 turn set with the carb just barely closed?
Can you define ''full RPM''? I don't think a 10 x 6 will spin 14K on this engine. Do you get a high speed needle response from rich to lean?
The fuel is not an issue for getting the engine to start. It is more an issue with longevity.
All the best,
I dont think the broken lug was from a crash. I think it was from being disassembled for some time sitting in my buddy's garage in a box with a bunch of other r/c stuff... The threads on the needles are in good shape and the needles themselves are straight as an arrow, and the ends look good.
I did a bunch of googling trying to find a base setting on the needles and the 1/2t/3t low/high settings were what I found on a aircraft info site. (cant remember the name off-hand) Chris at Fox Mfg. said to set the low speed to 1-1 1/2 turns and high speed 3 turns. I haven't had time to try this yet, but will in the next day or two.
Well, Full RPM = WOT. When I ran it last time, It seemed to be really loaded up and wouldn't clean out to run full WOT. With the line disconnected, it would open up all the way. I did not tach it as I was just running it for the first time. I would guess I was getting about 8000-9000rpm with the line connected and 10000-12000 with it disconnected. I think something is amiss in the carb, and I want to try an idlebar plug. Chris at Fox said they have a new carburetor out for the fox .40's that (in his words) will outperform all previous carburetors. Downside to this is the cost of the carb ($49.40) is about the same as a new engine using their trade-in program.
The bit about 14k on a 10x6 was read on another engine forum - I think it might have been the Mecoa Forum even.. I am gonna grab a 9x7 prop too and try both of them out when the engine is running better. I have a feeling the carb is junk though; I just havent ran it enough to determine if this is the problem or not.