Table of Contents
Advertisement
Quick Links
It is of vital importance, before attempting to
operate your engine, to read the general
'SAFETY INSTRUCTIONS AND WARNINGS'
section on pages 2-5 of this booklet and to strictly
adhere to the advice contained therein.
Also, please study the entire contents of this
instruction manual, so as to familiarize yourself
with the controls and other features of the
engine.
Keep these instructions in a safe place so that
you may readily refer to them whenever
necessary.
It is suggested that any instructions supplied
with the vehicle, radio control equipment, etc.,
are accessible for checking at the same time.
Advertisement
Table of Contents
Related Manuals for O.S. engine max-21RG-M
Summary of Contents for O.S. engine max-21RG-M
- Page 1 It is of vital importance, before attempting to operate your engine, to read the general 'SAFETY INSTRUCTIONS AND WARNINGS' section on pages 2-5 of this booklet and to strictly adhere to the advice contained therein. Also, please study the entire contents of this instruction manual, so as to familiarize yourself with the controls and other features of the engine.
-
Page 2: Table Of Contents
CONTENTS SAFETY INSTRUCTIONS AND CARE AND MAINTENANCE WARNINGS ABOUT YOUR O.S. ENGINE CHECKING OF THE ENGINE INTRODUCTION, BASIC ENGINE PARTS TROUBLE SHOOTING WHEN THE ENGINE FAILS TO START INSTALLATION NOTES CONCERING ENGINE EXPLODED VIEW THE RECOIL STARTER ENGINE PARTS LIST... -
Page 3: Safety Instructions And Warnings About Your O.s. Engine
As owner, you, alone, are responsible for the safe operation of your engine, so act with discretion and care at all times. If at some future date, your O.S. engine is acquired by another person, we would respectfully request that these instructions are also passed on to its new owner. - Page 4 WARNINGS • Never touch, or allow any • Never operate your engine in an en- object to come into contact closed space. Model engines, like auto- with, the rotating propeller and mobile engines, exhaust deadly carbon- do not crouch over the engine monoxide.
- Page 5 NOTES This engine was designed for model boats. • • Take care that the glowplug clip or battery Do not attempt to use it for any other purpose. leads do not come into contact with the propeller or any other rotating parts. Also Mount the engine in your model securely, •...
- Page 6 NOTES Adjust the throttle linkage so that the • • If your engine is fitted with a recoil starter, engine stops when the throttle stick and pull the operating handle straight out when trim lever on the transmitter are fully starting the engine, so that the cord does retarded.
-
Page 7: Introduction, Basic Engine Parts
The O.S. "RG Series" is a high-performance BASIC ENGINE PARTS 21RG-MX MAX- water-cooled marine engine for small radio- controlled boats, especially sport type hulls. Glow Plug No.8 Water Cooled Head A companion model, the MAX-21RG-MX in- Starter Handle corporating a recoil starter system is also available. - Page 8 INSTALLATION OF THE CARBURETOR INSTALLATION OF THE FLYWEEL Insert the taper collet on the crankshaft, taking care As delivered, the engine has its carburetor lightly not to push the crankshaft to the cover plate end. fitted into its intake boss. Secure it as follows. Loosen the retainer screw, rotate the carburetor to its correct position and make sure that it is pressed Crankshaft...
-
Page 9: Installation
INSTALLATION Make sure that the engine mounting beams in the hull are parallel, with their top surfaces in the same plane. If they are not, the engine will not rest firmly as the engine mounting faces (undersides of the mounting lugs) are precision machined to be flat Chamfer inside edges of bearers. -
Page 10: Glowplug 9
Try to avoid spilling fuel over the starter unit GLOWPLUG and its cord. Some fuels have a detrimental Since the compatibility of the glowplug and fuel can effect on these parts. have a marked effect on performance and reliability, it The starter prevents the engine from being is suggested that the user selects the R/C type plug rotated in the wrong direction. -
Page 11: Tools, Accessories, Etc
Glowplug life TOOLS, ACCESSORIES, etc. Particularly in the case of very high performance The following items are necessary for operating the engines, glowplugs must be regarded as expendable engine. items. However, plug life can be extended and engine FUEL performance maintained by careful use, i.e.: When the brand of fuel is changed, or the nitro content Install a plug suitable for the engine. - Page 12 PROPELLER FUEL PUMP Use well balanced propellers only. As the ideal For filling the fuel tank, a simple, poly- diameter, pitch and shape vary according to the size, ethylene "squeeze" bottle, with a suit- weight and type of model, final selection can be made able spout, is required.
-
Page 13: Carburettor Controls
REALIGNMENT OF MIXTURE CONTROL VALVE CARBURETTOR CONTROLS In the course of making carburettor adjustments, it is Two adjustable controls are provided on this carburettor. just possible that the Mixture Control Valve may be The Needle Valve: inadvertently screwed in or out too far and thereby When set to produce maximum power at full throt- moved beyond its effective adjustment range. -
Page 14: Starting & Initial Running-In('Breaking-In) 13
STARTING & INITIAL RUNNING-IN('Breaking-in') When starting the engine, put the hull on a stand, etc. • Turn the flywheel by hand to draw the fuel to the out of the water. fuel inlet. For long life and high perfomance, every engine •... - Page 15 To stop the engine, fully close the throttle to cut off Heat the glowplug by connecting the battery leads. air supply. Make sure that the direction of rotation of the electric starter is correct, namely, clockwise. PRECAUTIONS If necessary, reverse leads on battery to provide When starting the engine, clockwise rotation.
- Page 16 Note! Warm up the engine by running it at around idling If as a result of your boat being capsized, the setting for a while after starting, engine takes in water, remove the glowplug, As with the engine of a full size boat. High r.p.m. invert the engine and eject water by carefully operation without warming up will shorten engine turning the flywheel, first by hand and then with...
-
Page 17: Adjustment 16
ADJUSTMENT Continue with further runs, gradually closing the WARNING : ° needle-valve (20 to 30 at a time) until no further Running the engine with the boat out of the water, increase in speed is obtained. without load and without cooling water, will seri- ously damage it, due to overheating. - Page 18 7. Launch the boat and gradually open the throttle to Remember that, if the engine is operated with the fuel/air mixture slightly too lean, it will overheat and its fullest extent. If at this point, the engine puffs out a good deal of smoke and does not accelerate run unevenly or cut out.
-
Page 19: Care And Maintenance 18
CARBURETTOR CLEANLINESS CARE AND MAINTENANCE Proper functioning of the carburettor depends on its To ensure that you obtain long life and peak small fuel orifices remaining clear. The minute performance from your engine, observe the following. particles of foreign matter that are present in any fuel, As previously observed, foreign matter in the fuel can partially obstruct these orifices and upset mixture can cause problems. -
Page 20: Checking Of The Engine
At the end of each operating session, drain out any In the event of water having entered the cylinder, crankcase, etc., refer to the procedures recom- fuel that may remain in the fuel tank. Afterwards, energize the glowplug and try to restart the engine, mended in the footnote to "running-in"... -
Page 21: Trouble Shooting When The Engine Fails To Start 20
TROUBLE SHOOTING WHEN THE ENGINE FAILS TO START Four key points For quick, reliable starting, the following four conditions are required. 1 Good compression. 2 Adequate "glow" at glowplug. 3 Correct mixture. 4 Sufficient electric starter rotating speed. If the engine fails to start, or does not keep running after being started, check symptoms against the following chart and take necessary corrective action. - Page 22 Corrective action Cause Symptom Factor Voltage too high or too low. Re-check and readjust referring to ..Incorrect heating of Engine fires "BEFORE STARTING" glowplug. intermittently but does not run....Excess fuel Continue to apply starter.
-
Page 23: Engine Exploded View
MAX-21RG-M/MX EXPLODED VIEW C.M2.6X18 C.M2.6X7 M.+2.6X7 C.M2.6X18 C.M2.6X7 t -1 t -2 - -A Type of screw C … Cap Screw M … Oval Fillister-Head Screw F … Flat Head Screw N … Round Head Screw S … Set Screw... -
Page 24: Engine Parts List
MAX-21RG-M/MX ENGINE PARTS LIST Code No. Description 2 3704 100 Water Cooled Head Assembly 2 3603 000 Cylinder & Piston Assembly 2 3906 000 Piston Pin 2 3817 000 Piston Pin Retainer(2pcs.) 2 3605 000 Connecting Rod 2 5382 000... -
Page 25: Carburettor Exploded View & Parts List
CARBURETTOR EXPLODED VIEW & PARTS LIST Code No. Description 2 4981 405 Throttle Lever Assembly 2 6381 501 Set-screw 2 5381 203 Carburettor Rotor 2 6781 309 Mixture Control Valve 2 4881 824 '' O '' Ring (2pcs.) 2 6781 506 Rotor Spring S.M3X3 2 5382 100... -
Page 26: O.s. Genuine Parts & Accessories
O.S. GENUINE PARTS & ACCESSORIES T-2030 TUNED SILENCER GLOW PLUG MARINE UNIVERSAL SUPER JOINT JOINT TUBE 21 (72106030) (72106300) (22442009) No.8 (71608001) (71605100) CRANKSHAFT LONG SOCKET WRENCH SUPER FILTER LOCK WASHER (72403050) CLAMP WITH PLUG GRIP (10sets) (55500002) 1521 (71521000) (71530200) DUST CAP SET φ... -
Page 27: Three View Drawing 26
Dimensions(mm) MAX-21RG-M THREE VIEW DRAWING φ SPECIFICATIONS Displacement 3.46cc/0.211cu.in. Bore 16.6mm/0.654in. Stroke 16.0mm/0.630in Practical R.P.M. 3,000 35,000r.p.m. Power output 1.7ps/28,000r.p.m. Weight 317g/11.18oz. 33.5 10.5 JAPAN UNF 1/4-28 29.6 21.5 88.5... - Page 28 Dimensions(mm) MAX-21RG-MX THREE VIEW DRAWING φ SPECIFICATIONS Displacement 3.46cc/0.211cu.in. Bore 16.6mm/0.654in. Stroke 16.0mm/0.630in Practical R.P.M. 3,000 35,000r.p.m. Power output 1.7ps/28,000r.p.m. Weight 389g/13.72oz. 33.5 10.5 JAPAN UNF 1/4-28 29.6...
-
Page 29: Memo
MEMO... - Page 30 6-15 3-Chome Imagawa Higashisumiyoshi-ku Osaka 546-0003, Japan TEL. (06) 6702-0225 FAX. (06) 6704-2722 URL : http://www.os-engines.co.jp Copyright 2001 by O.S.Engines Mfg. Co., Ltd. All rights reserved. Printed in Japan. 090100...