Engine Starting
q 1) Carefully turn the high speed needle valve in completely until it stops,
then turn the needle valve out 2-1/2 turns. This is the mixture setting for
initial starting.
IMPORTANT Do not adjust the low speed needle valve at this time.
It’s factory-adjusted for the break-in process.
q 2) If hand starting, prime the engine by opening the throttle barrel
completely, placing your nger over the mufer opening and ipping the
propeller through compression 2~3 times. If you will be using an electric
starter, do not prime the engine. The starter will turn the engine over fast
enough to draw fuel on its own.
q 3) Connect the glow starter to the glow plug. Open the throttle barrel
to about 1/4 throttle and start the engine. If you are starting the engine by
hand, you will need to vigorously ip the propeller several times before
the engine will start. Once the engine begins running, immediately turn
the high speed needle valve in about 1/4 turn to keep the engine running.
q 4) Advance the throttle to full while turning the high speed needle
valve in to keep the engine running. The engine should be producing a
very noticeable white exhaust from the mufer and sound like it is running
rough. Allow the engine to run only for about 5 minutes, then shut the
engine off.
q 5) Now that you have started your engine, it must be properly broken
in. Proper break-in will seat all of the moving parts, particularly the piston
ring and cylinder. This procedure takes about 45 minutes of run-time and
is highly recommended. An engine that is properly broken in will produce
more power, be more user-friendly and last much longer than an engine
that does not receive a break-in period. For this reason we highly
recommend following the break-in procedure detailed in the Operating
Instructions before running the engine further.
OUR RECOMMENDATIONS
The following items are recommended for use with your Magnum XL RFS
series aircraft engine. These items are recommended for initial start-up and
running. Please read through the Operating Instructions for further details.
Fuel: Power Master 15% Premium Sport Fuel Blend for Break-In and
for Normal Use
We suggest using Power Master brand fuels. Power Master fuel comes in
many different nitromethane contents that can be used in your XL RFS
series engine. Power Master fuels are blended using only high-quality
nitromethane, methanol, castor oil and synthetic lubricants to provide
high power output, along with easy starting and unmatched lubricating
and heat dissipation qualities.
Fuel Tank: Dubro 10oz. Fuel Tank (Product Number 410)
Dubro fuel tanks are a perfect match for your XL RFS series engine. This
size recommendation will give you about 15 minutes of run-time at full
throttle. Dubro fuel tanks are possibly the easiest fuel tanks to assemble
and maintain, and feature a chin at the base of the fuel tank that prevents
the fuel tubing from kinking when installed in your aircraft.
Thunderbolt HP Glow Plug (Product Number 115480)
The Thunderbolt HP glow plug is designed specically for four-stroke
engines and produces low idle speeds, smooth transition, and cooler
running temperatures. The glow plug is also very durable and able to
withstand repeated use, day after day.
APC 12 x 6 Propeller (Product Number LP12060)
We have found that XL RFS series engines run best using APC brand
props. They are designed to be very efcient and run quiet at high rpm’s,
and they are also durable. Use this size propeller to break in your engine,
then change to the propeller that best suits your application. Use the
guide in the Operating Instructions to help you nd the right size propeller.
Glow Starter: Magnum Glow Starter w/Meter (Product Number 237438)
The Magnum glow starter is an excellent choice for heating the glow plug.
It uses a Sub-C NiCD, includes a meter to determine the quality of your
glow plug, and it also includes a charger to recharge the battery. It’s a
very economical product to purchase and can be used with any engine
that uses a glow plug.
Engine Mount: Dave Brown Engine Mount (Product Number 4045L)
The Dave Brown engine mount is a glass-lled reinforced nylon mount
that mounts to a plywood rewall in the model. It is lightweight, strong
and easy to install. The 'L' type mount features longer mounting beams
to allow for the rear-mounted carburetor found on four-stroke engines.
XL .52RFS AIRCRAFT ENGINE QUICK-START GUIDE
The following information is provided to get your new Magnum XL RFS series engine running right away with minimal effort. We have listed our
recommendations for fuel, propeller, glow plug, starting procedures and other recommended accessories. Also included is general information
about the accessories needed for the engine that we hope you will nd helpful.
This Quick-Start Guide should not be used as a replacement for the Operating Instructions included, rather, it should be used along with the
Operating Instructions. We highly recommend reading through the
Operating Instructions to familiarize yourself with each part of the engine,
along with the proper procedures for engine break-in and tuning.
q 1) Mount the engine to the recommended engine mount. A wood beam
mount built into the airframe would also be sufcient.
q 2) Install the mufer and exhaust pipe onto the engine using the
cinch nuts provided. The exhaust pipe can be rotated to better suit
the installation in your model. Be sure to tighten the cinch nuts rmly to
prevent the mufer and exhaust pipe from loosening.
q 3) Install a glow plug into the cylinder head, making sure to use the
copper gasket provided with the glow plug.
q 4) Install the propeller using the propeller nut, safety nut, and washer
provided. Tighten the nuts securely using an adjustable wrench.
q 5) Connect the fuel lines from the fuel tank to the engine. The fuel
pick-up line should be connected to the fuel nipple on the carburetor
and the pressure line should be connected to the pressure nipple on the
mufer. Do not connect any fuel line to the breather nipple on the bottom
of the crankcase.
QUICK-START STARTING PROCEDURES
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