Rotax 503
Rotax 503
Jpipe, I see your engine is mounted up side down. On my 1st Gyro I had it mounted that way. I live in Florida. If I didn't fly for a week, the gas/oil mix would wash down off the cylinder walls onto the spark plugs. This in effect would wet the plugs in a puddle of raw gas. Raw gas in liquid state doesn't burn. I removed the plugs and shook them out and put them back in. I also used a squeeze bulb from one of the ultralight parts houses. Not from a boat place. I pumped the squeezed bulb until it was hard, pulled the starter rope threw 3 times. Put the ignition on, put the choke on and start the engine. It never failed to start within 3 pulls. This has always worked for me. Also, when you get to 100 hours on your engine, replace the fuel pump. They are cheap and the have failed me 2 times within 150 hours. I have replace them at 100 hours and have never had another failure. The diaphrgm goes bad. It will get your attention if your in the air.
Hope this also helps. Alan Uhr Old home of the SuperGyro.