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PARTS OF FOUR-CYCLE MOTOR (Jump Spark, Air-cooled)

[blocks in formation]

R, Timer Shaft

S, Timer

SP, Spark Plug

T, Fly-wheel

U, Fly-wheel Locknut

V, Fly-wheel Key

W, Ball Thrust

X, Valve Gear

Y, Valve Cam

Z, Valve Push-rod Roller

ZA, Valve Push-rod

VE, Exhaust Valve

VEF, Exhaust-valve Foot
VEG, Exhaust-valve Stem Guide
VES, Exhaust-valve Stem
VET, Exhaust-valve Spring
VI, Inlet Valve

VIG, Inlet-valve Stem Guide
VIS, Inlet-valve Stem
VIT, Inlet-valve Spring
IV, Inlet

[blocks in formation]
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EXPLANATION OF FIG. 40

(Parts of Two-cycle Make-and-break System)

A, Spark Plug

B, Movable Electrode

C, Electrode Rocker Arm

D, Electrode Spindle

E, Electrode Spindle Bushing

F, Angular Dog

G, Trip Adjusting Screw

H, Plunger

I, Plunger Thimble

J, Plunger Spring

K, Rocker-arm Spring

L, Dog Spring

M, Slide Bar

N, Slide-bar Guide

O, Ecccentric and Eccentric Rod P, Pump

Q, Pump Plunger

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