Brian,
Thanks for identifying. I went to the monthly club meeting last night. I still have my RAM 500 and use the WREN 54 manual for service ideas. I think the Funsonic is a similar engine. Once when I had problems with RPM read out RAM suggested I degauss the front of the engine. I don't remember the exact procedure but I remember it involved running a strong magnet near the front of the engine. Bob Price who designed the RAM ECU may have made that suggestion to me.
I think I am now using the compressor nut with magnet that I purchased from WREN on my RAM 500. I am sure you have to get a stable RPM reading before the ECU will work properly.
Sid