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Vanguard Twin Cylinder OHV Liquid-Cooled Manual

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Vanguard
TM
Twin-Cylinder OHV Liquid-Cooled Engine
Section 2 - Troubleshooting
Page 11
SECTION 2
TROUBLESHOOTING
GENERAL INFORMATION
Most complaints concerning engine operation can be
classified as one or a combination of the following:
1. Will not start
2. Hard Starting
3. Lack of power
4. Runs Rough
5. Vibration
6. Overheating
7. High Oil Consumption
NOTE: What appears to be an engine
malfunction may be a fault of the powered
equipment rather than the engine. If equipment
is suspect, see Equipment Affecting Engine
Operation.
WILL NOT START
Engine Will Not Turn Over
1. Make sure that safety equipment installed by the
Original Equipment Manufacturer (OEM) is
functioning properly and is not preventing the
engine from cranking. Remove any parasitic load
on engine (drive unit disengaged).
2. Make sure battery cables and solenoid
connections are clean and tight.
3. Check battery voltage from positive battery
terminal to battery terminal on solenoid.
Voltage must not be below 11.7 volts.
Check Starter
A jumper wire is required for the next test.
1. Disconnect wire at tab terminal on solenoid.
2. Attach one end of jumper wire to positive terminal
on battery. Then, make contact to tab terminal
on solenoid, Fig. 7.
3. If starter cranks, there is a problem with the key
switch or wiring.
Fig. 7
4. If starter does not crank, remove jumper wire from
battery and attach to battery terminal on
solenoid.
5. With other end of jumper wire, make contact to the
field terminal on solenoid, Fig. 8.
Fig. 8
6. If starter turns over, the solenoid is defective.
Replace solenoid.
If starter does not turn over, the starter motor is
defective. Replace starter motor.
Engine Turns Over Slowly
If engine turns over slowly, but will not start, first refer to
Will Not Start, steps 1 - 3. Then perform a starter current
draw test.
… 16 …


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