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O.S. engine MAX-21RG Series Owner's Instruction Manual

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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.
CONTENTS
INTRODUCTION, BASIC ENGINE PARTS
INSTALLATION OF THE ENNGINE
2-5
6
7-8
8
9-12
12
13
ENGINE EXPLODED VIEW
13-14
15
15-18
1
18
18-19
20
21
21-22
22
23
24-27
28-29
30

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Summary of Contents for O.S. engine MAX-21RG Series

  • Page 1: Table Of Contents

    It is suggested that any instructions supplied with the vehicle, radio control equipment, etc., are accessible for checking at the same time. CONTENTS SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE IF THE ENGINE FAILS TO START 18-19 INTRODUCTION, BASIC ENGINE PARTS FINAL ADJUSTMENT...

  • Page 2: 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 3: Starting The Engine

    NOTES This engine is intended for model cars. • • The wearing of safety glasses is also Do not attempt to use it for any other strongly recommended. purpose. Take care that the glowplug clip or • Mount the engine in your model •...

  • Page 4: Engine Installation

    The MAX-21RG Series has been developed for BASIC ENGINE PARTS 1/8 scale off-road 'buggy' and scale cars.It provides a combination of performance and value that brings it within the reach of a larger Heatsink Head group of R/C model vehicle enthusiasts, from Carburetor newcomers to experienced competitors.

  • Page 5: Installation Of The Carburetor

    Avoid forcing the screws. Secure with locknuts. If the INSTALLATION OF THE CARBURETOR bottom of the recoil starter housing touches the car chassis, install the engine mount spacers (supplied) As delivered, the engine has its carburetor lightly between the engine's mounting lugs and the engine fitted into its intake boss.
  • Page 6 ASSEMBLY If your fingers become contaminated, wash them with soap and water. Slide the element base over the center tube (See Fig.1) and press down. NOTE: During storage, the oil may have become ・ If it is tight at the bottom, apply one or two drops of unevenly dispersed through the element.

  • Page 7: Notes Concerning The Recoil Starter

    FURTHER PRECAUTIONS Pull the operating handle straight out when ◆ When removing the air cleaner, check the inside of the starting the engine, so that the cord does not center tube and carburetor venturi. If any dirt is detected, rub against the vehicle body or engine. this indicates that the filter element was incorrectly This will help prevent the cord from being ◆...

  • Page 8: Carburetor Controls

    and contains between 10% and 30% nitromethane. As lead-acid cell with extended leads (or a resistance) to a starting point, we recommend a fuel containing 10% reduce the applied voltage to approximately 1.5 -V. nitromethane, changing to a fuel containing more nitro BATTERY LEADS if necessary.

  • Page 9: Starting The Engine & Running-In('Breaking-In)

    STARTING THE ENGINE & RUNNING-IN ('Breaking-in') • For long life and high performance, every engine needs DO NOT energize glowplug, to be properly 'run-in' or 'broken-in'. The running-in but apply electric starter to procedure for this engine can be carried out with the draw fuel to carburetor.

  • Page 10: If The Engine Fails To Start

    FINAL ADJUSTMENT IF THE ENGINE FAILS TO START • Run the vehicle (with throttle fully open) over the Check the following: longest available straight course, in order to observe • Glowplug battery discharged or glowplug defunct. the model's speed. Next return the car to the starting point, close the Needle-Valve 30˚...

  • Page 11: Carburetor Cleanliness

    ■ REALIGNMENT OF MIXTURE CONTROL VALVE CARBURETOR CLEANLINESS In the course of making carburetor adjustments, it is The correct functioning of the carburetor depends on just possible that the Mixture Control Valve may be its small fuel orifices remaining clear. inadvertently screwed in or out too far and thereby (See Care and Maintenance section on Page21.) moved beyond its effective adjustment range.Its basic...

  • Page 12: Guarantee

    inside the engine. Repeat this procedure until the GUARANTEE engine fails to fire. Do this while the engine is still warm. This engine is constructed from the very best materials available and to the very highest 4. Then, inject some after-run oil into the engine, and engineering standards, using the most advanced rotate the engine with an electric starter for 4 to 5 precision machinery.

  • Page 13: Engine Parts List

    21RG, 21RG(P) ENGINE EXPLODED VIEW 21RG, 21RG(P) ENGINE PARTS LIST C.M2.6x15 Description Code No. 23604010 Heatsink Head 23603000 Cylinder & Piston Assembly 23906000 Piston Pin 23817000 Piston Pin Retainer (2pcs.) Connecting Rod 23605000 23618001 Carburetor Complete (Type 20E) 23981700 Carburetor Retainer (with screw) Crankshaft Ball Bearing (Front) 41614000 23601000...
  • Page 14 21RG-X, 21RG(P)-X ENGINE PARTS LIST 21RG-X, 21RG(P)-X ENGINE EXPLODED VIEW Code No. Description 23604010 Heatsink Head C.M2.6x15 23603000 Cylinder & Piston Assembly 23906000 Piston Pin 23817000 Piston Pin Retainer (2pcs.) 23605000 Connecting Rod Carburetor Complete (Type 20E) 23618001 23981700 Carburetor Retainer (with screw) 41614000 Crankshaft Ball Bearing (Front) Crankcase...

  • Page 15: Carburetor Exploded View

    CARBURETOR EXPLODED VIEW Type of screw C...Cap Screw M...Oval Fillister-Head Screw F...Flat Head Screw N...Round Head Screw S...Set Screw C.M2.6x7 CARBURETOR PARTS LIST Code No. Description Mixture Control Valve Assembly 23818180 46066319 "O" Ring(L) (2pcs.) 22781800 "O" Ring(S) (2pcs.) 23818500 Throttle Stop Screw 23618190 Needle Valve Assembly...

  • Page 16: Three View Drawing

    Dimensions(mm) THREE VIEW DRAWING 4- 3.3 SPECIFICATIONS Displacement 3.46 cc / 0.211 cu. in Bore  16.6 mm / 0.654 in Stroke  16.0 mm / 0.630 in Practical R.P.M.  3,000-35,000 r.p.m. Power output  1.9 ps / 30,000 r.p.m. Weight 325g / 11.47 oz.(RG,RG(P)) 33.5 10.5 397.5g / 14.03 oz.(RG-X,RG(P)-X)

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