UMS 5-55 cc, User Manual

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engine, one of the finest engines in the market
place today. UMS is committed to you
having a positive experience and a lifetime of great
operation with your new engine.
It is important that you read the engine manual
before starting the engine for the first time.
UMS radial engines have different requirements
than engines that you may have operated
in the past. The manual provides important
information for installing the engine, selecting the
correct propeller, fuel requirements and proper
engine break-in procedures.
• Always use the correct size and pitch of propeller for your engine. Refer to the Propeller Chart
in this manual.
• Always confirm proper balance of your propeller prior to installation of the engine. Failure
to do so could result in damage to the engine and/or airframe.
• Always utilize an electric starter to start your engine.
• Always discard any propeller that is nicked, scratched, cracked or damaged in any way.
• Always run your model engine in a well-ventilated area. Model engines can produce possibly
harmful carbon monoxide fumes.
• Always store your fuel safely in a sealed, water-resistant container.
• Always store fuel in a cool, dry location. Do not allow fuel containers to come in direct
contact with concrete, as the fuel may absorb moisture.
• Always responsibly discard fuel if there is condensation and/or water inside the fuel
container.
• Never return unused fuel from the fuel tank back into the fuel container.
• Never attempt to repair or modify a propeller beyond its intended use.
• Never handle model engines, mufflers and/or tuned pipes until they have had time to cool.
They can become extremely hot when in use.
Precautionary Guidelines
Always mount the engine securely on a bench mount or high-quality engine mount.
•
Introduction
Thank you for purchasing an UMS radial