O.S. engine MAX-12TG-P Instruction Manual
O.S. engine MAX-12TG-P Instruction Manual

O.S. engine MAX-12TG-P Instruction Manual

Max-12tg series

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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.
SAFETY INSTRUCTIONS AND
WARNINGS ABOUT YOUR O.S. ENGINE
ENGINE CONSTRUCTION, NOTES WHEN
APPLYING AN ELECTRIC STARTER
INSTRUCTIONS
BASIC ENGINE PARTS
TOOLS, ACCESSORIES, etc.
STANDARD ACCESSORIES
CARBURETOR CONTROLS,
INSTALLATION OF THE CARBURETOR
NOTES CONCERNING THE RECOIL STARTER
GLOWPLUG
JAPAN
CONTENTS
2-5
ENGINE INSTALLATION
STARTING THE ENGINE &
6-7
RUNNING-IN ('Breaking-in)
8
FINAL ADJUSTMENT
9
TROUBLE SHOOTING
10-11
CARE AND MAINTENANCE
12
EXPLODED ENGINES VIEWS &
PARTS LIST
13-15
CARBURETOR EXPLODED VIEW &
PARTS LIST
16
O.S. GENUINE PARTS & ACCESSORIES
17
THREE VIEW DRAWING
1
18-19
20-26
27-30
31-34
35-37
38-45
46-49
50-52
53-56

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Summary of Contents for O.S. engine MAX-12TG-P

  • Page 1 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 ENGINE INSTALLATION 18-19 ENGINE CONSTRUCTION, NOTES WHEN STARTING THE ENGINE &...
  • Page 2: 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 ! NOTES This engine is intended for model cars. Take care that the glowplug clip or Do not attempt to use it for any other battery leads do not come into contact purpose. with rotating parts. Also check that the linkage to the throttle arm is secure.
  • Page 4: Applying An Electric Starter

    ENGINE CONSTRUCTION Near TDC With this engine, the piston Piston will feel tight at the top of its Cylinder Liner stroke (TDC) when the engine is cold. This is normal. The Crankshaft cylinder bore has a slight taper. The piston and cylinder Slight taper are designed to achieve a perfect running clearance...
  • Page 5: Instructions

    The 12TG Series engines are developed for 1/10 scale R/C cars. They are rear exhaust 12TG SERIES INSTRUCTIONS MAX- engines designed for sport use. For easier handling, the engines are This manual handles the following five versions. equipped with a newly designed 12E or 12D carburetor.
  • Page 6: Tools, Accessories, Etc

    TOOLS, ACCESSORIES, etc. REMINDER! Model engine fuel is poisonous. Do not The following items are necessary for operating the allow it to come into contact with the eyes engine. or mouth. Always store it in a clearly Items necessary for starting marked container and out of the reach of children.
  • Page 7: Carburetor Controls

    Standard accessories INSTALLING THE GLOWPLUG 12TG, 12TG-P Fit washer to glowplug and MAX- MAX- insert carefully into cylinder- Glow Plug No.8 1piece head, making sure that it is Socket not cross-threaded before Wrench Exhaust Seal Ring 1piece tightening firmly. Glowplug Washer 12TG-X, 12TG-PX...
  • Page 8: Installation Of The Carburetor

    Three adjustable controls are provided on this Carburetor Type 12E carburetor. The Needle-Valve(Adjusted at the factory): For adjusting the mixture strength when the throttle Needle Valve is fully open. The Mixture Control Screw Fuel Inlet (Adjusted at the factory): For adjusting the mixture strength at part-throttle Throttle Lever Needle Holder and idle speed, to obtain steady idling and smooth...
  • Page 9: Notes Concerning The Recoil Starter

    NOTES CONCERNING THE RECOIL STARTER Starter Handle REMINDER! This will help prevent the cord from being damaged by abrasion or engine heat. Try to avoid spilling fuel over the starter unit and its cord. Some fuels have a detrimental effect on these parts.
  • Page 10: Engine Installation

    ENGINE INSTALLATION When installing the engine on the chassis, note the The recommended screws for securing the engine are following points. 3mm or 4-40 steel Allen hexagon socket type. (Chamfer inside edges of bearers when the engine If existing holes in the engine mount do not align mount edges interfere with the engine.
  • Page 11: Glowplug

    STARTING THE ENGINE & RUNNING-IN ('Breaking-in) RUNNING-IN ('Breaking-in) While Operating Running- in is a procedure for an engine to come Please do not run on a public street, this close to actual running conditions (fuel, r.p.m., could cause serious accidents, personal engine temperature, etc.).
  • Page 12 The carburetor is set as shown below at the In case of the 12D carburetor factory. Start the engine as it is. approx 0.5mm Common to 12D/12E carburetors Approx. 0.5mm open The needle-valve is set approx. 2.5 turns opened factory setting from the fully closed position.
  • Page 13 Now connect glowplug battery lead to heat In case of the 12TG and 12TG-P the plug filament and start the engine. Start the engine using a starter box, making sure the engine rotation direction is correct (counter- In case of the 12TG-X and 12TG-PX clockwise seen from the crankshaft end).
  • Page 14: Final Adjustment

    Next, disconnect the glowplug battery and try Note: running the car on the track. If the engine stalls, In the event of any major working parts (e.g. open the throttle fractionally, but try to keep the piston/cylinder liner assembly) being replaced or the engine running as rich as possible: if it stops fuel being changed, especially to high nitro fuel, the because of being excessively over-rich, close the...
  • Page 15 Adjust medium and low RPM running. Adjust high RPM running. Run the vehicle (with throttle fully open) over the With the engine running, close the throttle and longest available straight course, in order to allow it to idle for about five seconds, then reopen observe the model's speed.
  • Page 16: Trouble Shooting

    REALIGNMENT OF METERING NEEDLE AND In case of the 12E carburetor MIXTURE CONTROL SCREW In the course of making carburetor adjustments, it Rotate the Mixture Control Throttle is just possible that the Metering Needle and the Screw until its slotted Lever Mixture Control Screw may be inadvertently head is flush with the ball...
  • Page 17 Engine fires intermittently but does not run. Corrective action Cause Insufficient fuel in the tank. Fill the tank with fuel. Replace glowplug. Deteriorated glowplug Clogged fuel filter Clean or replace fuel filter. Air cleaner and silencer inside is dirty. Replace cleaner element and clean inside silencer. Wait until engine cools.
  • Page 18: Care And Maintenance

    Poor response Corrective action Cause Replace glowplug. Deteriorated glowplug Readjust low r.p.m. range with metering Incorrect carburetor settings needle or mixture control screw. Incorrect setting of transmitter Exponential function. Check the transmitter setting. Make sure the throttle servo linkage does not Incorrect linkage bind and is connected correctly.
  • Page 19 Then, inject some after-run oil into the engine, and Note: rotate the engine with an electric starter or the Do not inject a petroleum based after-run oil into recoil starter for 4 to 5 seconds to distribute the oil the carburetor as this may cause the O-rings to all the working parts.
  • Page 24: Parts List

    12E 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 12E CARBURETOR PART LIST Code No. Description 21285901 Needle Valve Assembly 27881820 "O" Ring (2pcs.) 21881950 No.14 Universal Nipple Assembly 22681310 Throttle Stop Screw 21428100...
  • Page 25: Parts List

    12D CARBURETOR EXPLODED VIEW Type of screw C...Cap Screw M...Oval Fillister-Head Screw S.M3x3 F...Flat Head Screw N...Round Head Screw S...Set Screw 12D CARBURETOR PART LIST Code No. Description 21982970 Needle Valve Assembly 27881820 "O" Ring (2pcs.) 21881950 No.14 Universal Nipple Assembly 21982620 Throttle Stop Screw 22781800...
  • Page 26: Glow Plug

    O.S. GENUINE PARTS & ACCESSORIES Exhaust Manifold Assembly O.S. Tuned Silencer Glow Plug Spring connect type M1003 M1001 M1001SC (72106400) (72106420) (72106450) Left side exhaust, Left side exhaust, Left side exhaust, T-1050SC L52 Tuned No.8 Spring connect type Joint tube type Joint tube type Silencer Assembly (71608001)
  • Page 27: O.s. Genuine Parts & Accessories

    O.S. GENUINE PARTS & ACCESSORIES Engine Mount Spacer Super Air Cleaner 202 SUPER AIR CLEANER 203 (72413000) Off-road Type (72412000) On-road Type (72404000) 203 Filter Element (4pcs.) 202 Cleaner Body (72413200) (72412100) Super Joint Tube 15 (72103310) 202 Filter Element (4pcs.) (72412200) Cap Screw Set Long Socket Wrench...
  • Page 28: Three View Drawing

    12TG-X THREE VIEW DRAWING SPECIFICATIONS ■ 2.1 cc (0.128 cu.in.) Displacement ■ 13.8 mm (0.543 in.) Bore ■ 14.0 mm (0.551 in.) Stroke ■ 5,000-30,000 r.p.m. Practical R.P.M. ■ 0.7 ps / 0.71 hp / 28,000 r.p.m. Power output ■ 251.4 g (8.87 oz.) Weight 4- 3.3...
  • Page 29: Three View Drawing

    12TG-PX THREE VIEW DRAWING SPECIFICATIONS ■ 2.1 cc (0.128 cu.in.) Displacement ■ 13.8 mm (0.543 in.) Bore ■ 14.0 mm (0.551 in.) Stroke ■ 5,000-30,000 r.p.m. Practical R.P.M. ■ 0.7 ps / 0.71 hp / 28,000 r.p.m. Power output ■ 250 g (8.82 oz.) Weight 4- 3.3...

This manual is also suitable for:

Max-12tgMax-12tg-xMax-12tg-px

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