TP-6881 7/1598 Section 5 Component Testing and Adjustment
5.13.1 Fuel Solenoid Valve
A solenoid valve upstream of the regulator and the
flexible fuel connector provides automatic fuel on/off
control. See Figure 5-25. The engine starting battery
powers the solenoid valve and the engine starting
controls open the valve when the engine cranks or runs.
Fuel Valve Operation Test Procedure
1. Disconnect the positive (+) battery lead from the
gas valve terminal.
2. Apply 12 VDC to the gas valve terminal and listen
for an audible click, indicating that the valve
actuates.
3. Replace the gas valve if it does not actuate in
step 2.
1. Selector valve
2. Regulator
3. Fuel inlet, 1/2 in. NPT female
4. Fuel solenoid valve
2
1
4
3
Figure 5-25 Fuel System
5.13.2 Capacitive Discharge Ignition
(CDI) Timing
These systems use a capacitive discharge (CD) coil.
With CDI fixed timing, ignition timing and spark remains
constant regardless of engine speed. Timing of spark is
controlled by location of the flywheel magnet group.
For the 8RESV, a typical fixed ignition system consists
of:
D 1 magnet assembly that is permanently affixed to the
flywheel
D 1 electronic capacitive-discharge or magnetic
discharge ignition module that mounts on engine
crankcase
D 1stop switch ( or key switch) that grounds modules to
stop engine
D 1 spark plugs
For the 10RESV and 12RESV, a typical fixed ignition
system consists of:
D 1 magnet assembly that is permanently affixed to the
flywheel
D 2 electronic capacitive-discharge or magnetic
discharge ignition modules that mount on the engine
crankcase
D 1 stop switch (or key switch) that grounds modules to
stop the engine
D 2 spark plugs
See the engine service manual for ignition system
service information.
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