VanguardTM Twin-Cylinder OHV Liquid-Cooled Engine Section 2 - Troubleshooting
NO LOAD STARTER CURRENT DRAW TEST
3. Attach negative battery cable ground such as drive housing.
Remove starter motor.
4. Attach positive battery cable terminal on solenoid.
To hold starter securely while testing, clamp starter mounting bracket in a vise. DO NOT clamp starter housing in a vise or field windings or magnets may be damaged. Testing Starter (No Load) The No Load starter current draw test will be performed with the meter in the 300mV position. The DC Shunt must be installed on the negative (-) terminal of the battery, Fig. 11.
ATTACH NEGATIVE BATTERY CABLE
5. Attach one end of jumper wire terminal, Fig. 11.
to a good to battery to solenoid tab
6. Activate starter by contacting positive battery terminal with other end of jumper wire , Fig. 11. a. Allow 3 seconds for meter reading to stabilize. 7. Current draw should not exceed 50 amps DC. If amperage draw exceeds specification, replace starter. Hard Starting Make sure the oil level is correct. This engine is equipped with a “Low Oil Pressure Sensor” and will not start if the oil level is too low. Make sure drive unit is disengaged. A loose drive belt like a loose blade can cause a backlash effect, which will counteract engine cranking effort.
NOTE: Magnetron® ignition system requires a minimum of 350 RPM before it will produce a spark. Systematic Check If the engine is hard starting or will not start and the cause of malfunction is not readily apparent, perform a systematic check in the following order: 1. Ignition 2. Carburetion 3. Compression This check-up, performed in a systematic manner, can usually be done in a matter of minutes. It is the quickest and surest method of determining the cause of failure.
Fig. 11 1. Attach RED meter test lead terminal on shunt. 2. Attach BLACK meter test lead terminal on shunt.
to RED post to BLACK post
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