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Upon completion of properly tuning the carburetor, replace the vehicle spark plug. If
condition continues, verify adequate oil flow and ensure proper spark, then verify proper
ENGINE TIMING (refer to guide for proper procedure and specifications) if necessary. If
out of range, the MAGNETO ASSEMBLY is most likely sending a faulty reference to the
CDI, and needs replacement (refer to guide for removal/installation). Recommend
replacement of CDI at the same time.
NO-START CONDITION
Verify proper startup procedure to start engine. If no-start condition continues, verify fuel
flow by removing plug in overflow hose on carburetor.
Fuel flow
Verify adequate ignition spark by removing
spark plug.
No fuel flow
Verify fuel in tank.
Verify fuel flow at petcock valve.
Verify fuel flow at filter.
Verify clear lines to carburetor.
Possible lack of gas cap ventilation.
Possible stuck carburetor float or needle
valve.
Ignition spark is adequate
Ensure sufficient battery charge.
Inadequate ignition spark
Replace spark plug and once again verify
spark.
If no spark condition remains, verify current
flow to coil lead.
If no current to coil lead, verify current at
vehicle kill switch output.
If current at output, verify current at CDI
lead to coil.
If current at both locations, coil is faulty and
needs replacement.
If lack of current exists at either location,
part is faulty and needs replacement; ensure
proper battery charge.
