I’m having the same problem with my Martin 20 and want to know if the original motor in this thread was ever repaired?? If so, what did the owner (jimbrizzolara) do that made it work??
My motor seems to be in great condition, but it is acting as though it’s not getting spark (spark plug is wet). The magneto checks out (new coil and condenser) and even at 3/8″ gap I get a white-hot spark on a plug grounded to the block. I’ve rechecked the carburetor, the poppet valve and even the timing and everything seems to be as it should. Any suggestions???
I had two of these a while back, and IIRC, it flooded VERY easily. Try closing down the carb and roping it over to clear out the motor. Then open the needles a little bit at a time while trying to start the motor.
Also, I think the idle adjustment is an air valve, not a fuel valve. So opening that up more actually leans out the motor, not richening it.
Tried your suggestion, Tom, and there’s still no hint of firing. The spark plug, even leaned out, is damp. I switched spark plugs, even though I doubted it would make a difference (It didn’t). This one’s really stumping me…
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