MAX-21VZ-B V-Spec
OWNER'SINSTRUCTIONMANUAL
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
SAFETY INSTRUCTIONS AND |
|
WARNINGS ABOUT YOUR O.S. ENGINE - - |
- - 2-5 |
ENGINE CONSTRUCTION---------------- |
6 |
NOTES WHEN APPLYING AN ELECTRIC |
|
STARTER ----------------------------- |
7 |
ABOUT THE ENGINE-------------------- |
8 |
BEFORE STARTING------------------- |
9-11 |
BASIC ENGINE PARTS ------------------ |
11 |
CARBURETOR CONTROLS--------------- |
12 |
GLOWPLUG--------------------------- |
13 |
INSTALLATION OF THE STANDARD |
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ACCESSORIES------------------------ |
14 |
INSTALLATION------------------------- |
15 |
STARTING THE |
ENGINE & RUNNING-IN---16-19 |
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FINAL |
ADJUSTMENT------------------ |
20-22 |
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CARBURETOR |
CLEANLINESS------------- |
22 |
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CARE AND MAINTENANCE ------------ |
23-24 |
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CHECKING THE ENGINE ----------------- |
24 |
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GUARANTEE----------------------- |
25 |
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TROUBLE SHOOTING----------------- |
26-29 |
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ENGINE EXPLODED VIEW & PARTS LIST |
- - - 30-31 |
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CARBURETOR EXPLODED VIEW & |
|
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PARTS LIST------------------------- |
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32-33 |
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O.S. GENUINE PARTS & ACCESSORIES - - |
- - 34-35 |
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THREE |
VIEW |
DRAWING ------------------ |
36 |
1
SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE
Remember that your engine is not a "toy", but a highly efficient internalcombustion 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 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.
•The advice which follows applies basically to ALL MODEL ENGINES and is grouped under two headings according to the degree of damage or danger which might arise through misuse or neglect.
WARNINGS
These cover events which might involve serious (in extreme circumstances, even fatal) injury.
NOTES
These cover the many other possibilities, generally less obvious sources of danger, but which, under certain circumstances, may also cause damage or injury.
2
Model engine fuel is poisonous. Do not allow it to come into contact with the eyesormouth.Alwaysstore it in a clearly marked container and out of the reach of children.
Model engine fuel is also highly flammable. Keep it away from an open flame, excessive heat, sources of sparks, or anything else which might ignite it. Do not smoke or allow anyone else to smoke, near to it.
WARNINGS
Never operate your engine in an enclosed space. Model engines, like automobile engines, exhaust deadly carbon-monoxide. Run your engine only in an open area.
Model engines generate considerable heat. Do not touch any part of your engine until it has cooled. Contact with the muffler (silencer), cylinder head or exhaust header pipe, in particular, may result in a serious burn.
3
NOTES
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.
Install an effective silencer (muffler). Frequent close exposure to a noisy exhaust (especially in the case of the more powerful highspeed engines) may eventually impair your hearing and such noise is also likely to cause annoyance to others over a wide area.
The wearing of safety glasses is also strongly recommended.
Take care that the glowplug clip or battery leads do not come into contact with rotating parts. Also check that the linkage to the throttle arm is secure.
For their safety, keep all onlookers (especially small children) well back (at least 20 feet or 6 meters) when preparing your model for running.
4
NOTES
To stop the engine, fully retard the throttle stick and trim lever on the trans-mitter, or, in an emergency, cut off the fuel supply by pinching the fuel delivery line from the tank.
Warning! Immediately after a glowplugignition engine has been run and is still warm, conditions sometimes exist whereby it is just possible for the engine to abruptly restart if it is rotated over compression WITHOUT the glowplug battery being reconnected.
5
ENGINE CONSTRUCTION
With this engine, the piston will feel tight at the top of its stroke (TDC) when the engine is cold. This is normal. The cylinder bore is a little tapered. The piston and cylinder are designed to achieve a perfect running clearance when they reach their running temperatures.
Cylinder Liner
Crankshaft A little tapered
Around TDC
Piston
When the engine is cold. When the engine is hot.
6
NOTES WHEN APPLYING AN ELECTRIC STARTER
Do not over-prime. This could cause hydraulic lock and damage the engine on application of the electric starter.
If over-primed, remove glowplug, close needle-valve and apply starter to pump out surplus fuel. Cover the head with waste to prevent pumped out fuel coming into your eyes.
NOTE
As delivered, the engine has its carburetor lightly fit into its intake. Secure it changing its angle according to the car chassis.
7
ABOUT THE ENGINE
The MAX-21 VZ-B V-Spec is a high performance 3.5cc class power unit for one- eight-scale radio-controlled 'off-road' or 'buggy' cars. It has been expressly designed for racing competitions.
T-type plug (turbo plug) design improves the power, fuel consumption and durabili-
ty.
The new 21 C carburetor is supplied with 8mm and 9mm dia. reducers to manage different course conditions.
Standard accessories
Glow Plug P3 T-type head (Turbo head) 1piece
(Hot Type)
Cylinder-head gasket (0.1mm) 1 sheet
Exhaust Seal Ring 1 piece
Carburetor Reducer 8mm (Red) 1 piece (w/ "0" Ring)
Dust Cap03,016,018 every Ipiece
8
BEFORE STARTING
Tools, accessories, etc.The following items are necessary for operating the engine.
Optional Extras
GLOW PLUG T-Type (Turbo Plug)
P3 is supplied with the engine. As replacement, suggested O.S. plugs are P3 and P6.
SUPER AIR CLEANER 203 ASSEMBLY
This is a heavy-duty wet type air cleaner designed specifically tor 3.5cc 'off-road' model car engines.
T-2050 EXHAUST HEADER PIPE ASSEMBLY
This is designed to use with the T-2050 Tuned Silencer
T-2050 TUNED SILENCER ASSEMBLY
This is designed specifically for 3.5cc 'off-road' model car engines.
T-2050 TUNED SILENCER COMPLETE SET
This is a set of T-2050 Tuned Silencer and T- 2050 Exhaust Header Pipe Assembly.
TOOLS
HEX WRENCH
Necessary for engine installation. 1.5mm, 2mm, 2.5mm, 3mm opposite side
SCREWDRIVER
Necessary for carburetor adjustments.
No.1,No.2,etc
9
LONG SOCKET WRENCH WITH PLUG GRIP
Recommended for easy removal and replacement of the angled and recessed glowplug, the O.S.Long Socket Wrench incorporates a special grip.
Items necessary for starting
FUEL
Generally, it is suggested that the user selects a fuel that is commercially available for model two-stroke engines and contains 10-30% nitromethane. As a starting point, we recommend a fuel containing 20% nitromethane, changing to a fuel containing more nitro if necessary. When the brand of fuel is changed, or the nitro content increased, it is advisable to repeat the running-in procedure referred to in the RUNNING-IN paragraphs. Please note that with high-nitro fuels,
although power may be increased for competition purposes, glowplug elements do not last as long and engine life will be shortened.
REMINDER!
Model engine fuel is poisonous. Do not allow it to come into contact with the eyes or mouth. Always store it in a clearly marked container and out of the reach of children.
Model engine fuel is also highly flammable. Keep it away from open flame, excessive heat, sources of sparks, or anything else which might ignite it. Do not smoke or allow anyone else to smoke, near to it.
FUEL FILTER
To fit in the fuel line between fuel tank and carburetor to prevent dust coming into the carburetor.
GLOWPLUG IGNITER
Commercialy available handy glowplug heater in which the glowplug battery and battery leads are integrated.
10
STARTER BOX
For starting the engine.
7.2V BATTERIES FOR STARTER BOX
Batteries for starter box. Select according to the starter box used. Be sure to full charge before using.
FUEL PUMP
For filling the fuel tank, a simple, polyethylene "squeeze" bottle, with a suitable spout, is required.
SILICONE FUEL LINE
Heatproof silicone tubing of approx. 5mm o.d. and 2mm i.d. is required for the connection between the fuel tank and engine.
BASIC ENGINE PARTS
Heatsink Head
Carburetor
Type 21C
Exhaust
Cover Plate
Mounting Lugs
Crankcase
Crankshaft
11
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