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2
There should be continuity between the terminals
as listed in the table. Replace switch if there is no
continuity or continuity exists where it should not.
4. Check each terminal for continuity to
ground. The only terminal that should
have continuity to ground is the M
terminal.
If there is continuity at any other terminal:
• Replace switch.
If switch is good:
• Check wires for loose or broken
connectors and continuity.
• Repair or replace as required.
Troubleshooting Six-Terminal Key Switch
1. Remove carburetor cover with key switch.
Disconnect wiring harness from key
switch.
2. Set multimeter to Diode Test.
Fig. 45
3. There must be continuity between
terminals with key switch in position
shown.See number sequence of terminals
shown in Fig. 45.There must be continuity
between terminals #1, #3, #6 and the key
switch case when key switch is OFF.
Fig. 46
4. Disconnect interlock switch wires from
spade terminals on switch and at starter
motor connector.
5. Set multimeter to Ohms. See Figure 8.
6. Connect one meter test lead to the end of
one wire connector. Connect the other
test lead to connector terminal for the
same wire.
7. Meter should read low or no resistance.
8. Move wire inside connector.
• Meter should not change value.
• Replace or repair wiring if there is
intermittent or no continuity.
• Repeat for each wire in harness.
Low Oil Pressure Switch
The oil pressure switch is located on the sump,
oil filter adapter ([A] Fig. 47), or on the bypass
cover, Fig. 48.
M M+ BLST
OFF Yes Yes Stop
1 Yes Yes Run
2 Yes Yes Start
52


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