User manual DESERT AIRCRAFT DA50R

[. . . ] Thinner props may require using shorter prop bolts, especially if not using a spinner back plate. Adjust the carburetor linkage so that the motor will stop when the carburetor is completely closed. Be careful of any sparks from electrical contacts such as fuel pumps, battery chargers, etc. Always turn the prop a few revolutions after running the motor to discharge the ignition system. [. . . ] Unless you are having problems starting the motor, don't bother "testing" the ignition with the plug removed from the cylinder. When removing the spark plug caps, PULL STRAIGHT out on the caps, not the shielded ignition wires!If the cap seems loose, and is not making a solid metal-to-metal contact with the spark plug base, contact Desert Aircraft for a replacement. To prevent radio interference, the spark plug caps must have the split retainer ring around their base ­ DON'T FLY WITHOUT THEM!Protect the shielded plug wires from rubbing against fiberglass or sharp edged of wood or metal!Rubber grommets and plastic "spiral wrap" insulation from automotive or electronic supply stores work well to protect your braided shielding. Holes in the braided shielding can emit R/F noise (i. e: RADIO INTERFERENCE!) Damaged plug wires are not replaceable and may require the ignition to be replaced!Keep ignition components and wiring separated as much as possible from your receiver, receiver battery, servos, wiring and switches. Range with one section of the antenna extended should be at least 80 to 100 ft. Check for holes in the braided shielding or loose connections (spark plug caps, 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. Plug gap is . 018" to . 020" (. 45mm to . 50mm) 4 Fuel and Oil Mix Low to Mid octane pump gas is recommended. 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 mover freely. Use of any other fuel or additives such as methanol, nitro formulas, aviation gas, white gas, etc. , can harm the motor and will void the warranty. 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. Use a prop that allows peak RPM over 6. 500 during the break-in process. After the break-in process, we recommend a high quality synthetic oil. Some oils, and their mix ratios, that Desert Aircraft recommends are: Amsoil 100:1 Pre-Mix (100 to 1), Amsoil Saber Professional (100 to 1), Amsoil 2000 (50 to 1), Red-line (40 to 1), Bel-Ray H1-R (50 to 1). Mobil MX2T (32 to 1) These oils can be found at most motorcycle shops. Recommended Props Always tighten prop bolts and inspect your prop and spinner before each flight! [. . . ] o Needle settings may need adjustment when the engine is moved from one plane to another or cowl configurations (= airflow and pressure) is changed. IF ANY PROBLEM PERSISTS, PLEASE CONTACT DESERT AIRCRAFT FIRST! We designed and manufactured your engine and have serviced and trouble shooted thousands more. We cover your engine's warranty, not someone at the field or a stranger on the Internet. Please give us the opportunity to help! 7 DA 5 0 R WA RRA N T Y Your DA 50R engine and ignition system are covered with a 2 year warranty by Desert Aircraft, starting from the date of purchase. Disassembly of the engine or ignition system will void the warranty on that item. [. . . ]