Operation - BRP Johnson J30TEL4SUA 2007 Service Manual

ENGINE CONTROL

OPERATION

OPERATION
The ignition system is a condenser discharge type
system. The condenser built into the power pack
stores the electrical energy generated by the bat-
tery charge coil.
The ignition timing varies based upon engine
speed. When cranking, the ignition timing is fixed
at BTDC 5° until the engine starts. During normal
operation, the ignition timing varies according to
the engine model and engine operating condition.
1. Crankshaft position sensor No. 1
2. Crankshaft position sensor No. 2
3. Power source coil
4. Ignition coil No. 1
5. Ignition coil No. 2
6. Ignition coil No. 3
7. Engine stop switch
8. Ignition control circuit
9. CPU
10. Power source circuit
72
7
10
The CPSs monitor engine speed and send signals
to the power pack. Based on these signals, the
power pack determines the optimum ignition tim-
ing and supplies voltage stored in the condenser
to the ignition coil primary windings.
Advance
Ignition timing Model 30: BTDC 5° - 29°
Firing order
1
3
2
Magneto
8
9
Power Pack
Specifications
Electronic microcomputer con-
trol
1 - 3 - 2
4
5
6
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