Ignition System (Cont’d)
Always perform a radio range check before flying. Range check the radio system according
to the radio manufacturer’s guidelines with the engine off, then with the engine running. The
operational radio range should be nearly the same. If there are “glitches”, DON’T FLY!
Check for holes in the braided shielding or loose connections (spark plug cap to spark plug, all
connectors, and switches). If that doesn’t solve the problem, re-locate your ignition and receiver
components farther apart. If the problem persists, return the ignition to Desert Aircraft for
inspection.
If your radio has a failsafe, program the throttle to close in Failsafe mode.
Plug gap is .018” to .020” (.45mm to .50mm)
Soft mount ignition module
Plug cap
Shiel
ded plug wire
Velcro
Module
Timing sensor
Connector to switch and battery
Foam
Sensor c
onnector
Fuel and Oil Mix
Low octane pump gasoline is recommended. Higher octane gasoline can actually lower
performance unless a tuned exhaust system is used.
We recommend purchasing your fuel from “name brand” gas stations. We have seen problems
with cheaper gas from some discount type outlets.
We recommend filtering your fuel between your fuel container and your plane’s fuel tank. A high
flow filter, or clunk/filter, between the tank and motor is also a good idea.
Make sure the plane’s tank is well vented and the fuel clunk moves freely.
Use of any other fuel or additives such as nitro formulas, aviation gas, white gas, etc.,
can harm the motor and void the warranty.
Do not use any silicon sealers on the fuel system. Gas can break it down and carry it into the
carburetor.
For Break-in, we recommend a petroleum-based oil such as Lawn Boy Ashless or Pennzoil Air
Cooled 2 stroke oil at 32:1 ratio. Run at least 2 to 4 gallons of petroleum oil/gas mix for break-in.
This allows the ring to seat quickly without blow by. Use a prop that allows peak RPM over 6,200
during the break-in process. The High needle can be set just slightly rich during break-in. Too
rich will cause problems with excess residue and carbon build up.
After the break-in process, we recommend a high quality synthetic oil. As for brand of oil,
there are many good ones on the market. Some oils, and their mix ratios, that Desert Aircraft
recommends are: Amsoil Saber Professional (100 to 1), Red-line Two Stroke Racing Oil (40 to
1), Bel-Ray H1-R (50 to 1). Mobil MX2T (32 to 1) These oils can be found at most motorcycle
shops.
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