Magnum XL .80RFS Operating Instructions Manual

INTRODUCTION

BECOMING FAMILIAR WITH YOUR ENGINE

If you are familiar with the operation of model engines or just can’t wait to

run your new engine, please read through the Quick-Start Guide included.

This guide will help you get started right away and also includes some good

recommendations.  We do recommend reading through these Operating

Instructions in their entirety to familiarize yourself with the features and

operation of your new engine.  We have also included a Troubleshooting

Guide should you encounter any problems.

Please use the photos below to familiarize yourself with the components of

your new Magnum XL RFS series engine.

1

CAUTION - PLEASE READ!!

Global Services  18480 Bandilier Circle  Fountain Valley, CA  92708  Phone: (714) 963-0329  Fax: (714) 964-6236  Email:  service@globalhobby.com

Both Engines Feature:

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Ringed-Piston Design for Long Life and High Power

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Rear-Updraft, Dual-Needle Carburetor w/Choke

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High-Flow Quiet Muffler

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Dual Ball Bearing-Supported Crankshaft & Camshaft

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Dual Bushing-Supported Connecting Rod

Thank you for choosing a Magnum XL RFS series aircraft engine.  The XL .80RFS

and .91RFS engines are single cylinder, four-stroke engines incorporating

an aluminum piston, iron ring and steel sleeve for long life and high power

output.  A dual needle valve carburetor for precise fuel/airflow metering is

standard.  Both engines feature a ball bearing-supported crankshaft and

camshaft, dual bushing-supported connecting rod, and  a high-flow muffler

for more power and reduced noise.  Your Magnum XL RFS series engine

was designed by expert engineers and built by master craftsmen using only the

highest quality materials and CNC machinery.  These qualities provide the long

life and dependability you have come to expect from an engine of this caliber.

Magnum XL RFS series model airplane engines will consistently give you

dependable performance and reliability and will be a source of satisfaction

and pleasure if you follow these instructions as to the engine’s proper and

safe use.  You alone are responsible for the safe operation of your engine,

so act sensibly and with care at all times.  This Magnum XL RFS series

model airplane engine is not a toy.  It is a precision-built machine whose

power is capable of causing serious injury to yourself and others if abused or

misused, or if you fail to observe proper safety precautions while using it.

●

Keep spectators, especially small children, at least 20 feet away from the

engine while it is running.

●

Mount the engine securely in the airplane or on a suitable engine test

stand to run the engine.  Follow the mounting instructions in your kit's

instruction manual or on the plans for individual mounting recommendations.

Do not clamp the engine in a vise to test-run it.

●

Use the recommended size propeller and follow the proper procedure for

mounting the propeller.  Use the correct size wrench to tighten the propeller

nut and the safety nut.  Do not use pliers.

●

Inspect the spinner, propeller, and propeller and safety nuts on a regular

basis, looking for any signs of nicks, cracks or loosening.

●

To stop the engine, adjust the throttle linkage to completely close the throttle

barrel and therefore cut off the fuel/air supply.  You can also pinch the fuel

line to stop the engine, but only if it is accessible.  Do not throw anything into

the spinning propeller or attempt  to use your hands to stop the engine.

●

While the engine is running, stand behind the engine to make any

adjustments to the needle valves.  Do not reach over or around the propeller.

Do not lean toward the engine.  Do not wear loose clothing or allow anything

to be drawn into the spinning propeller while the engine is running.

●

If you need to carry your model while the engine is running, be conscious

of the spinning propeller.  Keep the airplane pointed away from you and

others at all times.

●

Do not use tight-fitting cowls over the engine.  They can restrict air from

flowing over the engine, which could result in engine damage from overheating.

ENGINE INSTALLATION

Engine Orientation

Your XL RFS series engine can be orientated in any position on the firewall.

Keep in mind that when the engine is mounted inverted, carburetor

adjustments will need to be made differently and the fuel tank may need to

be lowered.  (See fuel tank size and orientation to carburetor on the next page.)

OPERATING

INSTRUCTIONS

Displacement: ................ .80ci (12.8cc) / .91ci (14.95cc)

Bore: ............................... 26.5mm / 27.7mm

Stroke: ............................ 24.8mm / 24.8mm

Practical RPM: ............... 2,000 - 12,000 / 2,000 - 12,000

Weight: ............................ 20.0oz / 20.7oz (w/o Muffler)

21.7oz / 22.4oz (w/ Muffler)

XL .80RFS/.91RFS ENGINE SPECIFICATIONS

For XL .80RFS and XL .91RFS

Series Four-Stroke Engines