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  5. Owner's Instruction Manual

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

Summary of MAX-21RG Series

  • 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 familia...

  • Page 2: Warnings

    ! ! 2 remember that your engine is not a "toy", but a highly efficient internal- combustion machine whose power is capable of harming you, or others, if it is misused. As owner, you, alone, are responsible for the safe operation of your engine, so act with discretion and care at all times. If at som...

  • Page 3: Notes

    ! 4 this engine is intended for model cars. Do not attempt to use it for any other purpose. Mount the engine in your model securely, following the manufacturers' recommendations, using appropriate screws and locknuts. Fit an effective silencer (muffler). Frequent close exposure to a noisy exhaust (e...

  • Page 4

    6 the max-21rg series has been developed for 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 group of r/c model vehicle enthusiasts, from newcomers to experienced competitors. All major parts of the max-21rg hav...

  • Page 5

    8 note: where spacers are supplied joined in pairs (see sketch) separate them as shown. Either face may be placed downwards. Avoid forcing the screws. Secure with locknuts. If the bottom of the recoil starter housing touches the car chassis, install the engine mount spacers (supplied) between the en...

  • Page 6

    10 assembly 1. ・ ・ ・ 2. Installing the element. ・ slide the element base over the center tube (see fig.1) and press down. If it is tight at the bottom, apply one or two drops of fuel at the point marked in fig.2 press down near to the center (not the outside) to avoid risk of breaking the element ba...

  • Page 7

    12 further precautions when removing the air cleaner, check the inside of the center tube and carburetor venturi. If any dirt is detected, this indicates that the filter element was incorrectly installed or should have been replaced earlier.In this event, it is vitally important to wash out the insi...

  • Page 8

    15 carburetor controls the needle-valve: ・ the mixture control screw: ・ the throttle stop screw: for setting the minimum idling speed: ・ three adjustable controls are provided on this carburetor. For adjusting the mixture strength when the throttle is fully open. For adjusting the mixture strength a...

  • Page 9

    16 0.3 〜 0.5mm use the same fuel as is to be employed for all initial running and containing not less than 18% lubricant. Temporarily remove the glowplug to check that it glows bright red when energized. Open the needle-valve 3 turns from the fully closed position. Switch on the transmitter and rece...

  • Page 10

    18 if the engine fails to start check the following: glowplug battery discharged or glowplug defunct. Fuel not reaching carburetor. Engine flooded. Do not over-prime. (this could also cause hydraulic lock and damage the engine on application of the electric starter.) remove glowplug, close needle-va...

  • Page 11

    20 carburetor cleanliness the correct functioning of the carburetor depends on its small fuel orifices remaining clear. (see care and maintenance section on page21.) ball link and slide valve extension ■ when readjusting the position of the ball link, always apply a 6mm spanner (wrench) to the flats...

  • Page 12

    22 4. Then, inject some after-run oil into the engine, and rotate the engine with an electric starter for 4 to 5 seconds to distribute the oil to all the working parts. Inside the engine. Repeat this procedure until the engine fails to fire. Do this while the engine is still warm. Note: 5. Do not in...

  • Page 13

    24 21rg, 21rg(p) engine exploded view c.M2.6x15 1 2 3 4 4 5 6 7 8 9 10 11 12 12-a 13 14 15 c.M2.6x18 c.M2.6x7 c.M3x8 type of screw c...Cap screw m...Oval fillister-head screw f...Flat head screw n...Round head screw s...Set screw 25 21rg, 21rg(p) engine parts list the specifications are subject to a...

  • Page 14

    26 21rg-x, 21rg(p)-x engine 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.M2.6x15 1 2 3 4 4 5 6 7 8 9 10 11 12 11-a 13 14 15 c.M2.6x18 c.M2.6x7 m.+m2.6x7 16 16-1 16-2 27 21rg-x, 21rg(p)-x engine parts list the specifi...

  • Page 15

    28 1 1-1 1-2 2 3 3-1 3-2 3-3 3-4 4 5 6 7 8 9 10 11 c.M2.6x7 type of screw c...Cap screw m...Oval fillister-head screw f...Flat head screw n...Round head screw s...Set screw carburetor exploded view 29 carburetor parts list the specifications are subject to alteration for improvement without notice. ...

  • Page 16

    30 29.6 45 21 4- 3.3 33.5 10.5 37 54 80.7 95.8 40 84 (65.6) unf1/4-28 44 3.46 cc / 0.211 cu. In 16.6 mm / 0.654 in 16.0 mm / 0.630 in 3,000-35,000 r.P.M. 1.9 ps / 30,000 r.P.M. 325g / 11.47 oz.(rg,rg(p)) 397.5g / 14.03 oz.(rg-x,rg(p)-x) ( ) -rg/rg(p) dimensions(mm) three view drawing displacement bo...