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46
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6. MAGNETO
6-1 OPERATION AND FUNCTION
The ignition system of the EH09D and EH12-2D is a breakerless flywheel magneto with an automatic
advancing system.
Being different from the breaker point type ignition system, this system is completely free from such
troubles as starting-up failure due to dirty, burnt or corroded point surface.
The electronic automatic advancing ensures extremely easy starts and stable high performance at oper-
ating speed by advancing the ignition timing to the most suitable point.
6-2 BASIC THEORY
(1) Revolution of the flywheel generates electricity on the primary side of the ignition coil, and the base
current I
1 flows to the power transistor.
Current I
1 turns the power transistor “ON” and the electric current I2 flows.
5-5 BREAK-IN OPERATION
A new engine or an engine that has been completely overhauled by being fitted with a new piston, rings,
valves and connecting rod should be thoroughly RUN-IN before being put back into service.
Good bearing surfaces and running clearances between the various parts can only be established by
operating the engine under reduced speed and loads for a short period of time.
While the engine is being tested, check for oil leaks.
Make final carburetor adjustment and regulate the engine operating speed.
Table. 5-2
petSdaoLdeepSenignEemiT
1petS daoLoNmpr005,2.nim01
2petS daoLoNmpr000,3.nim01
3petS daoLoNmpr006,3.nim01
4petS
D90HE)PH0.1(Wk7.0
mpr006,3.nim03
D2-21HE)PH4.1(Wk0.1
5petS
D90HE)PH9.1(Wk4.1
mpr006,3.nim06
D2-21HE)PH8.2(Wk1.2
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