VanguardTM Twin-Cylinder OHV Liquid-Cooled Engine Section 2 - Troubleshooting
Testing Equipment Wiring
4. If solenoid does not “click”, it is defective. Replace.
1. With keyswitch in OFF position, disconnect solenoid wire (GRAY WIRE) from engine wiring harness connector (WHITE WIRE). 2. Insert red meter test lead into equipment side of wiring harness connector (WHITE WIRE) , Fig. 17. 3. Attach black test lead to a good ground
.
4. Turn keyswitch to ON position. a.Meter should display battery voltage at connector.
Fig. 18
FUEL PUMP - GENERAL INFORMATION
Fig. 17
The fuel pump, mounted on the No. 1 cylinder fan bracket, allows remote fuel tank installations. The fuel pump will prime at 12” (30.5 cm) maximum lift. Fuel pump pressure is 1.5 psi (0.1 Bar). The pump is operated by pulsating crankcase vacuum from the engine. The vacuum pulse line is installed on the No. 1 cylinder valve cover, Fig. 19.
If meter does not display battery voltage, problem is with wiring harness. Check for loose or broken wire. If meter displays battery voltage, test engine wiring harness. Testing Solenoid A pair of jumper wires and a 9 volt transistor battery are required for this test. 1. Attach one jumper wire to solenoid wire (GRAY WIRE) and positive terminal on battery , Fig. 18. 2. Attach second jumper wire to negative terminal on battery and a good ground . 3. Solenoid should “click”.
Fig. 19 NOTE: An air leak at the fuel pump pulse line hose connections will result in improper fuel flow.The fuel pump is available as an assembly only. Replace fuel lines and vacuum pulse line if stiff and brittle.
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