Service Manual

5-3
Table of Contents
Electrical
Twin Cylinder Engine Service Manual
February 2017 - Digital Edition
ELECTRICAL SYSTEM AND COMPONENTS
This section covers the description, location, and operation of the electrical system components including the
charging system, electric starter, and the ignition spark circuit.
WARNING
Electric shock can cause injury.
Do not touch wires while engine is running.
Spark Circuit
The spark circuit components include the two ignition coils, ywheel magnets, and spark plugs.
Spark Plugs: One per cylinder, emission certied for all three choices:
1. NHSP BP8RES
2. Champion RN9YC
3. NGK BPR6ES
Proper gap is 0.030 in. (0.76 mm). A normal spark plug condition (color, oily, dry) should be light gray or tan in
color. The center electrode should be dry, like new. The porcelain should be white to tan, not cracked.
Ignition Coils: The ignition coils create high voltage spark for the combustion ignition. They are mounted under the
blower shroud on top of each cylinder, next to the ywheel. They are interchangeable for either cylinder (Figure 1).
Figure 2
Schematics
Electrical Diagram (Rev. A)
51
Voltage Regulator = Yellow
Fuel Solenoid= Red
Mag Kill= Black
Engine Ground=Green