O.S. engine max-18tz series Owner's Instruction Manual
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O.S. engine max-18tz 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.
ENGINE CONSTRUCTION, NOTES WHEN
CONTROLS (11K), (11L)
GLOWPLUG, INSTALLATION,
CONTENTS
2-5
6-7
8
9-10
ENGINES EXPLODED VIEW &
11-13
14-16
17-20
1
21-23
24-25
26-29
30-37
38-41
42-44
45-48

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Mike schmieder
February 13, 2025

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Summary of Contents for O.S. engine max-18tz series

  • Page 1: Table Of Contents

    CONTENTS FINAL ADJUSTMENT, SAFETY INSTRUCTIONS AND 21-23 CARBURETOR CLEANLINESS WARNINGS ABOUT YOUR O.S. ENGINE ENGINE CONSTRUCTION, NOTES WHEN CARE AND MAINTENANCE, APPLYING AN ELECTRIC STARTER 24-25 CHECKING THE ENGINE 18TZ SERIES INSTRUCTIONS...

  • 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 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. Mount the engine in your model securely, following the manufacturers' For their safety, keep all onlookers...

  • Page 4: Applying An Electric Starter

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

  • Page 5: 18Tz Series Instructions

    18TZ SERIES INSTRUCTIONS Standard accessories MAX- Glow Plug P3 T-type head (Turbo head) This manual handles the following four versions. 1piece 18TZ-T with 11L carburetor MAX- (Hot Type) 18TZ(S)-T with 11L carburetor MAX- Exhaust Seal Ring 1piece 18TZ-TX with 11L carburetor MAX- 18TZ(P)-T with 11K carburetor MAX-...

  • Page 6: Basic Engine Parts, Carburetor

    TOOLS STARTER BOX HEX SCREWDRIVER For starting the engine. Necessary for engine installation. It is not necessary for 1.5mm, 2mm, 2.5mm, 3mm the recoil starter ver- sion-i.e. 18TZ-TX. 7.2V BATTERIES FOR STARTER BOX SCREWDRIVER Batteries for starter box. Necessary for carburetor adjustments. Select according to the No.1, No.2, etc starter box used.
  • Page 7 CARBURETOR CONTROLS (11K) Four adjustable controls are provided on this carburetor. The Needle-Valve: For adjusting the mixture strength when the Needle Valve throttle is fully open. The Mixture Control Valve: For changing the mixture strength at mid Mixture Control Valve speed and acceleration.

  • Page 8: Engine Installation

    GLOWPLUG Glowplug life Since the compatibility of the glowplug and fuel Particularly in the case of very high performance may have a marked effect on performance and engines, glowplugs must be regarded as expendable reliability, it may be worthwhile to choose the items.

  • Page 9: Notes Concerning The Recoil Starter

    In case of the 18TZ-TX NOTES CONCERNING THE RECOIL STARTER Avoid forcing the screws. Secure with locknuts. ( 18TZ-TX ONLY) REMINDER! If the bottom of the recoil starter housing would otherwise touch the car chassis, install the en- Do not attempt to disassemble the recoil starter. If you do so, the very strong spring inside will be gine mount spacers (optional extra) between suddenly ejected.
  • Page 10 In case of the 11K carburetor Element glows when energized. Set the throttle-stop screw so that the minimum Pliers throttle opening (idle setting) is approximately 0.3-0.5mm. approx 0.3-0.5mm Replace the plug when the element does not glow or is burnt out. In case of the 11L carburetor Glow Plug Igniter Set the throttle-stop screw so that the minimum...

  • Page 11: Final Adjustment

    time is required before the car is raced Run the car on the track until one tank of fuel again. In the event of any major working has been consumed, then close the Needle- parts (e.g. piston/cylinder liner assembly) Valve 30˚ and run the car for another full tank being replaced or the fuel being changed, of fuel.

  • Page 12: Carburetor Cleanliness

    Carry out adjustments patiently, under actual If the engine runs too fast with the throttle running conditions, until the engine responds closed, the throttle stop screw should be quickly and positively to the throttle control. turned counter-clockwise to allow the throttle opening to be reduced.

  • Page 13: Care And Maintenance

    CARE AND MAINTENANCE The minute particles of foreign matter, that are 4. Then, inject some after-run oil into the engine, and present in any fuel may, by accumulating and rotate the engine with an electric starter for 4 to 5 partially obstructing fuel flow, cause engine seconds to distribute the oil to all the working performance to become erratic and unreliable.

  • Page 14: Trouble Shooting

    Symptom TROUBLE SHOOTING Engine fails to fire. Corrective action Cause Fuel tank is empty. Fill the tank with fuel and repeat Fuel not reaching the engine. Priming procedure. Glowplug element is burnt out. Replace glowplug. Glowplug battery discharged Recharge or replace the battery. Clean or replace fuel filter.
  • Page 15 Symptom Unstable idle Corrective action Cause Unsuitable glowplug Use suggested glowplug in the instructions. Do not use extremely high nitro Unsuitable fuel or low oil content fuel. Extremely light flywheel Add suitable load. Silencer is disconnected or has play Install silencer securely. Symptom Not reaching expected peak r.p.m.

  • Page 20: Parts List

    11K CARBURETOR EXPLODED VIEW S.M3x3 Type of screw C...Cap Screw M...Oval Fillister-Head Screw F...Flat Head Screw N...Round Head Screw S...Set Screw 11K CARBURETOR PARTS LIST Code No. Description 21982700 Mixture Control Valve Assembly 27881820 "O" Ring(L) (2pcs.) 22781800 "O" Ring(S) (2pcs.) 21285901 Needle Valve Assembly 27881820...

  • Page 21: Parts List

    11L 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 11L CARBURETOR PARTS LIST Code No. Description 21285901 Needle Valve Assembly 27881820 "O" Ring (2pcs.) 21881950 No.14 Universal Nipple Assembly 22681310 Throttle Stop Screw 21884110...

  • Page 22: Genuine Parts & Accessories

    O.S. GENUINE PARTS & ACCESSORIES RACING ENGINE PARTS O.S. Glow Plug Exhaust Manifold Assembly Tuned Silencer M1001SC Joint tube type M1001 (72106400) (72106420) Left side exhaust, Left side exhaust, (71641600) T-1040 L52 T-1040 R52 Spring connect type Joint tube type (72103056) (72103051) Manifold Spring...

  • Page 23: Three View Drawing

    O.S. GENUINE PARTS & ACCESSORIES RACING ENGINE PARTS Engine Mount Spacer Exhaust Seal Ring Dust Cap Set (2pcs.) (72404000) (21427200) (5pcs.) (73300305) (3pcs.) (73300812) 16mm (3pcs.) (73301612) Super Joint Tube 15 18mm (3pcs.) (73301812) (72103310) Cap Screw Set Long Socket Wrench (10pcs.) With Plug Grip M2.6x7...
  • Page 24 18TZ-T THREE VIEW DRAWING SPECIFICATIONS ■ 3.0 cc ( 0.183 cu.in. ) Displacement ■ 16.0mm (0 . 629 in. ) Bore ■ 15.0mm ( 0.590 in. ) Stroke ■ Practical R.P.M. 3,000-34,000 r.p.m. ■ Power output 1.8 ps / 1.83 hp / 29,000 r.p.m. 4- 3.3 ■...
  • Page 25 18TZ-TX THREE VIEW DRAWING SPECIFICATIONS ■ 3.0 cc ( 0.183 cu.in. ) Displacement ■ 16.0mm (0 . 629 in. ) Bore ■ 15.0mm ( 0.590 in. ) Stroke ■ 3,000-34,000 r.p.m. Practical R.P.M. ■ Power output 1.8 ps / 1.83 hp / 29,000 r.p.m. ■...

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