EasyManua.ls Logo

O.S. engine max-18tz series - User Manual

O.S. engine max-18tz series
25 pages
Save Page as PDF
Print Icon
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Loading...
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.
●
●
1
CONTENTS
SAFETY INSTRUCTIONS AND
WARNINGS ABOUT YOUR O.S. ENGINE
ENGINE CONSTRUCTION, NOTES WHEN
APPLYING AN ELECTRIC STARTER
18TZ SERIES INSTRUCTIONS
TOOLS, ACCESSORIES, etc.
BASIC ENGINE PARTS, CARBURETOR
CONTROLS (11K), (11L)
GLOWPLUG, INSTALLATION,
NOTES CONCERNING THE RECOIL STARTER
PRESSURIZED FUEL SYSTEM,
STARTING THE ENGINE & RUNNING-IN
('Breaking-in)
2-5
6-7
8
11-13
14-16
17-20
FINAL ADJUSTMENT,
CARBURETOR CLEANLINESS
CARE AND MAINTENANCE,
CHECKING THE ENGINE
TROUBLE SHOOTING
ENGINES EXPLODED VIEW &
PARTS LIST
CARBURETOR EXPLODED VIEW &
PARTS LIST
O.S. GENUINE PARTS & ACCESSORIES
THREE VIEW DRAWING
38-41
9-10
42-44
24-25
26-29
30-37
21-23
45-48

Table of Contents

Questions and Answers

  • L
    Luis WebbAug 5, 2025
    What to do if O.S. engine fires intermittently but does not run?
    • M
      Mindy SnyderAug 6, 2025
      If your O.S. engine fires intermittently but doesn't run, several factors could be at play. Make sure there's enough fuel in the tank by filling it up. A deteriorated glowplug could also be the culprit, so consider replacing it. Check for a clogged fuel filter or a dirty air cleaner and silencer; if necessary, clean or replace the fuel filter, replace the cleaner element, and clean inside the silencer. Ensure the engine hasn't overheated; if it has, wait for it to cool down. Also, check the clutch release and adjust the tension of the clutch spring if it's incorrect. Make sure you aren't disconnecting the starting battery too soon; wait until the RPM becomes stable. Finally, vibration causing air bubbles in the fuel can be a problem; install O-rings to the tank screws to prevent bubbles.
  • R
    Rhonda DyerAug 11, 2025
    Why is my O.S. engine not reaching expected peak r.p.m.?
    • D
      Darlene WestAug 11, 2025
      If your O.S. engine isn't reaching the expected peak RPM, it could be due to insufficient warming up or running-in. Ensure you set the needle only after warming up and complete the running-in process. Also, check that the silencer or manifold is securely connected; replace the seal ring and secure any loose connections. A split or broken fuel tubing from the tank can also cause this issue, so replace the tubing if necessary.
  • C
    Connor MorseAug 16, 2025
    How to fix unstable idle on O.S. engine?
    • W
      walkerkellyAug 16, 2025
      To fix an unstable idle on your O.S. engine, first ensure you're using the suggested glowplug as indicated in the instructions. Avoid using unsuitable fuel with extremely high nitro or low oil content. If you have an extremely light flywheel, add a suitable load. Finally, check that the silencer is securely installed; if it's disconnected or has play, install it securely.
  • J
    Jordan ManningAug 21, 2025
    What causes poor response in O.S. engine?
    • M
      marygrossAug 21, 2025
      Poor response in your O.S. engine can stem from several causes. A deteriorated glowplug is a common culprit, so consider replacing it. Incorrect carburetor settings can also lead to poor response; readjust the low RPM range using the metering needle and mixture control valve. Additionally, check the transmitter setting, as an incorrect setting of the transmitter exponential function can cause this issue. Finally, ensure the linkage is correct and that the throttle servo does not interfere with the servo linkage.
  • D
    Donna JenkinsAug 26, 2025
    How to improve poor r.p.m. drop in O.S. engine?
    • Z
      Zachary GarciaAug 27, 2025
      To improve poor RPM drop in your O.S. engine, check the throttle position. If it's open too far, close the metering needle to an adequate position to lower the idle RPM. Ensure the carburetor is fully seated; if not, install it securely. Also, check the metering needle; if it's closed too far, open it a little.
  • C
    Christopher HendersonOct 31, 2025
    What to do if my O.S. engine fails to fire?
    • J
      Jonathan ThompsonOct 31, 2025
      If your O.S. engine fails to fire, several issues could be the cause. First, ensure that the fuel tank is adequately filled and that fuel is reaching the engine; if not, fill the tank and repeat the priming procedure. Check the glowplug element for burnout and the glowplug battery for sufficient charge; replace the glowplug or recharge the battery as needed. A clogged fuel filter or dirty air cleaner and silencer can also prevent firing; clean or replace the fuel filter, replace the cleaner element, and clean inside the silencer. If you've over-primed the engine, remove the glowplug and pump out any excess fuel. Also, make sure the fuel tubing is connected securely and is free from kinks, splits, or holes. Incorrect servo linkage or a reverse rotating direction of the starter box can also ...

Summary

OWNERS INSTRUCTION MANUAL

SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE

Essential safety guidelines and warnings for operating the O.S. engine to prevent injury or damage.

ENGINE CONSTRUCTION

NOTES WHEN APPLYING AN ELECTRIC STARTER

Precautions for using an electric starter to avoid hydraulic lock and engine damage.

MAX-18 TZ SERIES INSTRUCTIONS

About the engine

Information on the 18TZ series engines, their development for specific vehicles, and included accessories.

TOOLS, ACCESSORIES, etc.

FUEL

Recommendations for fuel type, nitromethane content, and running-in procedures.

GLOWPLUG IGNITER

Description of the glowplug igniter and its function in starting the engine.

TOOLS

HEX SCREWDRIVER

Specifies the necessary hex screwdriver sizes for engine installation.

SCREWDRIVER

Specifies the types of screwdrivers needed for carburetor adjustments.

LONG SOCKET WRENCH WITH PLUG GRIP

Recommended wrench for glowplug removal and replacement.

BASIC ENGINE PARTS

CARBURETOR CONTROLS (11 K)

CARBURETOR CONTROLS (11 L)

GLOWPLUG

The role of the glowplug

Explains how the glowplug initiates ignition and maintains engine running.

Glowplug life

Tips for extending glowplug life and factors affecting it.

When to replace the glowplug

Identifies symptoms indicating a glowplug needs replacement.

INSTALLATION OF THE CARBURETOR

ENGINE INSTALLATION

NOTES CONCERNING THE RECOIL STARTER (18 TZ-TX ONLY)

PRESSURIZED FUEL SYSTEM

STARTING THE ENGINE & RUNNING-IN (Breaking-in)

FINAL ADJUSTMENT

CARBURETOR CLEANLINESS

REALIGNMENT OF METERING NEEDLE AND MIXTURE CONTROL VALVE

How to reset the metering needle and mixture control valve to their standard positions.

CARE AND MAINTENANCE

Installing Dust Caps

Instructions on installing dust caps on ports when storing the engine to prevent contamination.

CHECKING THE ENGINE

TROUBLE SHOOTING

MAX-18 TZ(P)-T ENGINE PARTS LIST

MAX-18 TZ(P)-T ENGINE EXPLODED VIEW

An exploded diagram showing the assembly of the 18TZ(P)-T engine.

MAX-18 TZ-T ENGINE PARTS LIST

MAX-18 TZ-T ENGINE EXPLODED VIEW

An exploded diagram showing the assembly of the 18TZ-T engine.

MAX-18 TZ(S)-T ENGINE PARTS LIST

MAX-18 TZ(S)-T ENGINE EXPLODED VIEW

An exploded diagram showing the assembly of the 18TZ(S)-T engine.

MAX-18 TZ-TX ENGINE PARTS LIST

MAX-18 TZ-TX ENGINE EXPLODED VIEW

An exploded diagram showing the assembly of the 18TZ-TX engine.

11 K CARBURETOR EXPLODED VIEW

11 K CARBURETOR PARTS LIST

A list of parts for the 11K carburetor with corresponding part numbers.

11 L CARBURETOR EXPLODED VIEW

11 L CARBURETOR PARTS LIST

A list of parts for the 11L carburetor with corresponding part numbers.

O.S. GENUINE PARTS & ACCESSORIES

O.S. Glow Plug

Identification of different O.S. glow plug models.

18 TZ(P)-T THREE VIEW DRAWING

18 TZ-T THREE VIEW DRAWING

18 TZ(S)-T THREE VIEW DRAWING

18 TZ-TX THREE VIEW DRAWING

O.S. engine max-18tz series Specifications

General IconGeneral
Fuel TypeGlow fuel
Ignition SystemGlow plug
Engine Type2-stroke
Glow PlugO.S. #8
Fuel10-20% nitro content recommended
Displacement0.18 cu in (2.95 cc)
Output1.2 hp @ 28, 000 rpm

Related product manuals