TROUBLESHOOTING AND ELECTRICAL SYSTEM: 850 GAS
Test Procedures
Page 12-20
2007-2008 XRT 800, 810 and 850 Maintenance and Service Manual
12
TEST PROCEDURE 13 – IGNITION SPARK
See General Warning on page 1-1.
NOTE:
Keep the battery connected while performing this test procedure.
1. Place the Forward/Reverse handle in the NEUTRAL position and the neutral lockout switch in the MAIN-
TENANCE position. Chock the wheels.
2. Remove the plug wire from the spark plug. Using an ignition spark gap test tool (Thexton 404
®
or equiv-
alent), check for correct spark
(Figure 12-16, Page 12-20)
.
2.1. Adjust the tester probes to approximately 18,000 volts (18 Kv) setting (SE –
Small Engine Setting
on the Thexton 404 tool). Connect the tester to the spark plug wire, and connect the alligator clip
to a solid engine ground.
2.2. Start the engine. There should be a strong blue spark between the probes of the spark gap tester.
If there is no spark, or if the spark is a faint yellow or red color, test components of the ignition circuit.
See Test Procedure 15 – Ignition Coil on page 12-21.
3. If the spark gap tester tool indicates a strong blue spark, it is possible the spark plug has failed internally.
Check the spark plug gap. The gap should be set at 0.027 to 0.031 of an inch (0.69 to 0.79 mm). If the
gap is correct, replace the spark plug with a new part and test the engine for proper operation.
TEST PROCEDURE 14 – RPM LIMITER
See General Warning on page 1-1.
1. Disconnect the battery cables as instructed.
See WARNING “To avoid unintentionally starting...” in
General Warning on page 1-2.
2. Disconnect both of the bullet terminals
(Figure 12-18, Page 12-21)
.
3. Using a multimeter set to 200 ohms, place the red (+) probe on the brown ground wire and place the
black (–) probe on one of the black wire female bullet connectors. The reading should be no continuity.
If the reading is not correct, replace the RPM Limiter.
Figure 12-16 Ignition Spark Test
Figure 12-17 White/Black Engine Kill Wire
1. Ignition Gap Test Tool 2. Chassis
1. Disconnect White/Black Engine Kill Wire 2. RPM Limiter
2
1
1
2
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