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Thank you for choosing a Magnum XL RFS series aircraft engine.  The XL
1.80RFS is a single cylinder, four-stroke engine 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.
The engine features a dual-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.

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!!

XL 1.80RFS

Global Services  18480 Bandilier Circle  Fountain Valley, CA  92708  Phone: (714) 963-0329  Fax: (714) 964-6236  Email:  [email protected]

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.)

Features

Ringed-Piston Design for Long Life and High Power

Rear-Updraft, Dual-Needle Carburetor

High-Flow Quiet Muffler

Dual Ball Bearing-Supported Crankshaft & Camshaft

Dual Bushing-Supported Connecting Rod

SINGLE CYLINDER

FOUR-STROKE ENGINE

OPERATING INSTRUCTIONS

(P/N 210989)

XL 1.80RFS ENGINE SPECIFICATIONS

Displacement .......................... 29.52cc
Bore: ........................................ 36mm
Stroke: ..................................... 29mm
Practical RPM: ........................ 1,800 - 10,000
Weight w/Muffler: .................... 38.9oz

http://globalservices.globalhobby.com

Summary of Contents for XL 1.80RFS

Page 1: ...an 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 ...

Page 2: ...an remove the carburetor and reinstall it in the opposite direction with no effect on performance To remove the carburetor loosen the two screws holding the intake manifold in place Next remove the two screwsholdingthecarburetor to the engine and remove it by gently pulling it down off the intake pipe Installation is the reverse of disassembly Be careful not to damage the O ring when reinstalling ...

Page 3: ...le valve is preset from the factory for initial starting and break in Do not adjust it until after the engine is broken in The low speed needle valve regulates the air fuel mixture at idle and during transition from idle to full throttle Turn the needle valve screw clockwise to lean the mixture Turn it counterclockwise to richen the mixture The low speed needle valve screw is preset from the facto...

Page 4: ...g on the high speed needle valve and you can begin to fine tune the needle valve settings to increase performance BREAK IN PROCEDURE Now that your engine is broken in you can set the high and low speed needle valves for optimum performance Please jump to the top of the next column OPTIMIZING THE MIXTURE SETTINGS WARNING Be careful never to lean the engine out too much Remember that the lubricants ...

Page 5: ...Tappet Screw 284300 Crankcase 284301 Backplate 284302 Connecting Rod 284303 Crankshaft 284304 Wrist Pin Retainer 284305 Propeller Washer 284306 Piston 284307 Cylinder Sleeve 284308 Piston Ring 284309 Propeller Nut Safety Nut 284310 Muffler Assembly 284311 Muffler Only w Nipple 284312 Rocker Cover 284313 Rocker Arm 284314 Cam Gear 284315 Carburetor Assembly 284316 Throttle Barrel 284317 Intake Pipe...

Page 6: ...re tight including the muffler and exhaust pipe cinch nuts Periodically check your fuel system including the plumbing inside the fuel tank for leaks or cracks We recommend changing the silicone fuel tubing inside and outside the fuel tank at the start of every flying season or about once a year Long Term Storage If you will not be using your engine for a long period of time such as during the wint...

Page 7: ...el Be sure to tighten the cinch nuts securely to prevent the muffler and exhaust pipe from loosening 3 Install the propeller to the engine using the propeller washer propeller nut and the safety nut provided Tighten the nuts securely using an adjustable wrench 4 Connect the fuel lines to the carburetor and to the muffler Make sure that the silicone crankcase return tube is connected between the cr...

Page 8: ... close completely completely 6 Engine overheats A Engine running too lean A Richen high speed needle valve B Cowl too restrictive B Open larger vents in cowling to allow air to exit C Wrong type of fuel used C Use fuel with recommended oil content D Engine not fully broken in D Allow engine further break in time 7 Engine stops abruptly A Engine running too lean A Richen high speed needle valve B P...

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