Magnum XL .30RFS Operating Instructions Manual

The Magnum XL .30RFS is a single cylinder, overhead valve four stroke

engine incorporating ringed piston technology for long life and high power

output under extreme conditions.  A dual needle carburetor is utilized for

easy and precise mixture adjustments.  A polished aluminum muffler is

included to keep the noise to a minimum without sacrificing power.  The

engine was designed by expert engineers and built by master craftsmen

using only the highest quality materials and CNC machinery.  These quali-

ties provide the long life and dependability you have come to expect

from an engine of this caliber.

INTRODUCTION

BECOMING FAMILIAR WITH THE

MAGNUM XL .30RFS

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 Starting Guide in-

cluded. This guide will help you get started right away and also includes

some good recommendations.  We do recommend reading through this in-

struction sheet in it’s 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 XL .30RFS engine.

SPECIFICATIONS

Displacement.............................................5.0cc (.30cu.in.)

Bore............................................................................19.7mm

Stroke..........................................................................16.4mm

Practical R.P.M.................................................2,200 - 13,000

Weight (w/Muffler)....................................................9.6oz.

Crankshaft Thread Size...............................................1/4 - 28

WARNING!

Magnum model engines will consistently give you dependable perfor-

mance 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 sensi-

bly and with care at all times.  This Magnum model 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, misused or if you fail to observe

proper safety precautions while using it.

N

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

the engine while it is running.

N

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

stand to run the engine.  Follow the mounting instructions in your kits

instruction manual or on the plans for individual mounting recommenda-

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

N

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.

N

Inspect the spinner, propeller and propeller nut on a regular basis,

looking for any signs of nicks, cracks or loosening.

N

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.

N

While the engine is running stand behind the engine to make any ad-

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

Do not lean towards the engine.  Do not wear loose clothing or allow any-

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

N

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

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

and others at all times.

N

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

from flowing over the engine and result in engine damage from overheating.

ENGINE INSTALLATION

q Engine Orientation

The Magnum XL .30RFS engine can be orientated in any position on the

firewall.  Keep in mind that if you mount the engine inverted, carburetor

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

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

Engines mounted inverted tend to run richer during idle and transition to

full throttle, and are generally more difficult to setup and tune properly.

OPERATING INSTRUCTIONS

Muffler

Intake

Pipe

Throttle Arm

Rotor Bolt

Low Speed

Needle Valve

Rocker Cover

Pushrod

Tubes

Prop

Nut

Prop

Washer

Drive Washer

Crankcase Breather Nipple

Fuel

Nipple

High Speed

Needle Valve

Pressure Nipple