O.S. engine MAX-BGX-1 RING Owner's Instruction Manual page 3

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Take care that the glow plug clip or battery leads do not come into contact with the propeller.
Also check the linkage to the throttle arm. A disconnected linkage could also foul the propeller.
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After starting the engine, carry out any needle-valve readjustments from a safe position behind the rotating
propeller. Stop the engine before attempting to make other adjustments to the carburettor.
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Adjust the throttle linkage so that the engine stops when the throttle stick and trim lever on the transmitter are fully
retarded. Alternatively, the engine may be stopped by cutting off the fuel supply. Never try to stop the engine
physically.
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Take care that loose clothing (ties, shirt sleeves, scarves, etc.) do not come into contact with the propeller.
Do not carry loose objects (such as pencils, screwdrivers, etc.) in a shirt pocket from where they could fall through
the propeller arc.
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Do not start your engine in an area containing loose gravel or sand. The propeller may throw such material in your
face and eyes and cause injury.
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For their safety, keep all onlookers (especially small children) well back (at least 20 feet or 6 meters) when preparing
your model for flight. If you have to carry the model to the take-off point with the engine running, be especially
cautious. Keep the propeller pointed away from you and walk well clear of spectators.
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Warning! Immediately after a glowplug-ignition engine has been run and is still warm, conditions sometimes exist
whereby it is just possible for the engine to abruptly restart if the propeller is casually flipped over compression
WITHOUT the glowplug battery being reconnected. Remember this if you wish to avoid the risk of a painfully rapped
knuckle!
INTRODUCTION
This 'RN' version of the MAX-BGX-1 RING is fitted, as stan-
dard, with a 'remote' needle-valve, mounted at the back of
the engine, safely distanced from the propeller.
This device was origonated by OS several years before be-
ing adopted by a number of other manufacturers.
INSTALLING THE GLOW PLUG
Carefully insert plug, with washer,
fingertight only, before final tightening
with the correct size plug wrench.
BEFORE INSTALLING THE REMOTE NEEDLE
Fit the remote needle to the attachment bracket as shown in
the photo.
When beam-mounting the engine in the model, bolt the en-
gine to the bearers along with the attachment bracket. Please
refer to the INSTALLATION section of the engine instructions
when installing the engine.
Connect the needle-valve to carburettor jet nozzle with sili-
cone tubing supplied. In the event of the tubing becoming
damaged, it should be replaced with 78mm length of 5mm
ODX2mm ID silicone tubing.
NOTES
4
BASIC ENGINE PARTS
Carburettor Type 8AA(RN)
Crankshaft
Glow plug
Washer
Lock Nut
Silicone Tube
5
Cylinder Head
Crankcase
Drive Hub
Propeller Washer
Propeller Nut
Remote Needle
M5x15
M5 Nut
Beam Mount
Glowplug No.8
Cover Plate
Beam Mount
Backplate Mount
Remote Needle
Valve Bracket