QUICK START and TROUBLESHOOTING GUIDE
The following information is provided to get your new Magnum XL .25ARNV or XL .28ARNV running right away with minimal
effort. We have listed our recommendations for fuel, propeller, starting procedures and other recommended accessories. Also
included is general information about the accessories needed for the Magnum XL .25ARNV and XL .28ARNV engines that we hope
you will find helpful.
This Quick Start Guide should not be used as a replacement to 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 your
particular engine, along with the proper procedures for engine break-in, tuning, care and maintenance.
OUR RECOMMENDATIONS
The following items are recommended for use with both the XL .25ARNV
and XL .28 ARNV engines. These items are recommended for initial
start-up and running. Please read through the Operating Instructions for
further details.
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Fuel: Power Master 10% 2-Stroke Blend (# 275180) for break-in
and normal operation.
We suggest using Power Master brand fuels. Power Master fuel comes
in 10% and 15% nitromethane contents that can be used in both the
Magnum XL .25ARNV and XL .28ARNV engines. 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. For
the extra lubrication necessary for break-in, use 10% 2-stroke blend.
After break-in, for extra performance, use 15% 2-stroke blend.
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Fuel Tank: Hayes 6oz. Fuel Tank (# 071)
The Hayes 6oz. fuel tank is a perfect match for the .25 and .28. It is
large enough to give you about 15 - 20 minutes of run-time at full throttle,
and is possibly the easiest fuel tank to assemble and maintain.
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Glow Plug: Thunderbolt R/C Long (# 115493)
The Thunderbolt R/C Long glow plug is designed to be used in two stroke
engines using fuels containing 10% - 20% nitro content and in any envi-
ronment. It is a “hot” type of glow plug for easy starting, excellent transi-
tion and incredible top end. The plug is also very durable and able to
withstand repeated use, day after day.
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Propeller: APC 9 x 5 Propeller (# LP09050)
We have found that the engines run at there best using APC brand props.
They are designed to be very efficient, run quiet at high R.P.M.’s and are
also durable. Use this size prop to break-in your engine, then change to
the prop that best suits your application. Use the guide in the Operating
Instructions to help you find the right size propeller.
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Glow Driver: Magnum Glow Starter w/Meter (# 237438)
The Magnum glow starter is an excellent choice for heating the glow
plug. It uses a Sub-C Nicad, 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.
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Motor Mount: Hayes Motor Mount AL-25 (# 011 )
The Hayes motor mount is a glass filled type that mounts to a ply-
wood firewall in the model. It is easy to install and rugged, yet in the
event of a crash, will break away to minimize damage to the engine
and/or airframe.
QUICK STARTING
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Engine Preparation
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1)
Mount the engine to the recommended motor mount. A wood
beam mount built into the airframe would also be sufficient.
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2)
Install the muffler to the engine using the two machine screws
and washers provided. Use one of the muffler gaskets provided. The
back portion of the muffler can be rotated to better suit the installation in
your model. Be sure to tighten the retaining nut securely to prevent the
muffler from loosening.
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3)
Using a 1/4” drill bit, drill out the center hub in the propeller.
Install the propeller to the engine using the washer and propeller nut pro-
vided. Tighten the propeller nut securely using an adjustable wrench.
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Engine Starting
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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.
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2)
If hand starting, prime the engine by opening the throttle barrel
completely, placing your finger over the carburetor opening and flipping
the prop 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 it’s own.
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3)
Connect the glow starter to the glow plug. Open the carburetor
barrel to about 1/4 throttle and start the engine. If you are starting the
engine by hand, you will need to vigorously flip the prop several times
before the engine will start. Once the engine begins running, immedi-
ately turn the high speed needle valve in to keep the engine running.
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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 muffler and sound like it is run-
ning rough. Allow the engine to run only for about 5 minutes, then shut
the engine off.
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5)
Now that you have started your new engine it must be properly
broken-in. Proper break-in will seat all of the moving parts, particularly
the piston and sleeve. This procedure takes about 30 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 you run the engine further.
XL .25A
RNV
and XL .28A
RNV
