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How to Strip an Engine

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How to Strip an Engine

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  • May 2006
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Engineering Report

Engine Dismantle
And Rebuild

Travis Wight

TEN053B

Mr. Mulligan

Contents

Introductionp1

What is a Two Stroke Engine?P2

How a Two-Stroke Engine Works

Power Strokep3
Fuel Intakep4
Compression strokep5

Dismantling the Enginep

Engine Assessmentp

Engine Rebuildp

Appendices

Introduction

The task at hand was to find a medium sized internal combustion engine. With this engine we had to dismantle it recording all the steps taken to pull it down. After the engine had been taken apart, all the functions of the engine had to be observed and recorded. After observing and recording all the information, it was then required to make any minor repairs, adjustments or replacements. Once the repairs had been carried out, the engine had to be rebuilt back to its original or better then working condition.

What is a Two-Stroke Engine?

A two-stroke engine is an engine that is mainly used in lower-power devices. Two stroke engines are used in devices such as jet skis, dirt bikes, lawn mowers and other petrol powered garden equipment such as whipper snippers, chainsaws and leaf blowers. Two-stroke engines are renowned and used for their simplistic design. Without having valves it reduces weight and reduces complexity of its design. The engine can function in any orientation. This means that it can be moved upside down, around in any direction without the engine stopping. This has a massive advantage over four stroke engines because they need to stay upright for the oil flow to remain constant. Two stroke engines have the ability to create a lot of power because of the amount of power strokes per revolution, in addition with its small lightweight design; two stroke engines have a high power-to-weight ratio.

Fig 1) Cross section of a two-stroke engine's barrel and crank case.

How a Two-Stroke Engine Works
Power Stroke
Starting from the point where the spark plug...

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