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SH Engines SH .21 XB User Manual

SH Engines SH .21 XB
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Displacement ..............................................................................3.497cc
Bore ............................................................................................16.27mm
Stroke .........................................................................................16.75mm
Maximum RPM
...........................................................................38,000rpm
Power..........................................................................................2.8hp@38,000rpm
Weight .........................................................................................464gr
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Ceramic Piston (XB) with 8-Port Chrome-Plated Brass Sleeve (Liner)
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Aluminium Piston (XB-1) with 8-Port Chrome-Plated Brass Sleeve (Liner)
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Dual Ball Bearing-Supported Crankshaft and Dual Bushing-Supported Connecting Rod
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Three-Needle Slide Carburettor and Heat-Dissipating Cylinder Head
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7.5mm and 8.5mm Carburettor Intake Restrictors
P/N PT2008-XB
P/N PT2008-XB-1
Cylinder Head
Carburettor
Assembly
Crankshaft
Fuel
Nipple
Throttle Arm
High Speed
Needle Valve
Low Speed
Needle Valve
Due to manufacturing changes and
improvements, your engine may
differ slightly from that shown.
Crankcase
Idle Stop Screw
Page 1
SH .21 XB AND XB-1 PRO COMPETITION OFF-ROAD ENGINE OPERATING INSTRUCTIONS
INTRODUCTION
BECOMING FAMILIAR WITH YOUR ENGINE
CAUTION - PLEASE READ BEFORE USE!
Thank you for choosing the SH .21 XB/XB-1 PRO Competition Off-Road engine.
All SH engines are designed for high power output and easy handling.
The SH .21 XB/XB-1 PRO Competition Off-Road engines are designed specically
for 1/8th scale off-road racing and feature competition-grade aluminium-alloy
parts, a ceramic piston (XB) / Aluminium piston (XB-1) with 8-port chrome-plated
brass sleeve (liner), dual ball bearing-supported crankshaft, three-needle
slide carburettor with 7.5mm and 8.5mm intake restrictors, heat-dissipating
cylinder head and superb attention to detail and quality. All SH engines are
manufactured using CNC manufacturing equipment to ensure every engine is
produced to the exacting quality that you would expect from an engine of this
caliber. SH engines offer the best in reliability, power and cost.
SH engines will consistently give you dependable performance and reliability
and will be a source of satisfaction and pleasure if you follow these instructions
as to the engine’s proper and safe use. You alone are responsible for the safe
operation of your engine, so act sensibly and with care at all times. This engine
is not a toy. It is a precision-built machine whose power is capable of causing
serious injury to yourself and others if abused, misused or if you fail to observe
proper safety precautions while using it.
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Never use any fuel in your engine other than glow fuels specically designed
for use in model car/buggy engines. Use of any other types of fuel can cause
severe damage to the engine and/or personal injury.
NEVER USE GASOLINE/PETROL OR DIESEL FUEL!
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Never operate your model on any public streets. This could cause trafc
accidents, personal injury or property damage.
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Before starting the engine, make sure that the throttle trim is set to the idle
position. Starting the engine at any setting above idle can cause the model
to lurch out of your hands.
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When the engine is running, there are certain parts that rotate at high speeds.
Be careful not to touch the drive shafts, gears, clutch assembly or other
moving parts. Serious injury could result.
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It is normal for the engine to get very hot during operation, especially the
cylinder head and exhaust system. Never touch the engine or exhaust system
while they are hot.
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Model car engines produce vibration when they are running. It is important
to periodically check the engine mounting screws, exhaust mounting
screws and other assemblies to ensure they are tight. Running the engine
with the engine mounting screws loose can lead to severe engine and/or
chassis damage.
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Glow fuel engines emit exhaust vapors that are poisonous and can be
dangerous to your health. It is important that you operate your engine in a
very well-ventilated area, preferably outdoors.
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Glow fuels, like those used in your model engine, are poisonous. Follow all
the precautions that are printed on the fuel manufacturer's container.
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Keep glow fuels out of the reach of children.
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Glow fuels are extremely ammable. Keep glow fuels away from high heat,
sparks, and ame.
Please read through these operating instructions in their entirety to familiarise
yourself with the features and operation of your new SH .21 XB/XB-1 PRO
Competition Off-Road engine.
Should you encounter any problems with your engine, we have included a
separate Troubleshooting Guide with these Operating Instructions to help
you solve them. Please use the photos below to familiarise yourself with the
components of your new SH engine.
Mid Range
Needle Valve
Exhaust Port

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SH Engines SH .21 XB Specifications

General IconGeneral
BrandSH Engines
ModelSH .21 XB
CategoryEngine
LanguageEnglish