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Wisconsin — Timing Magneto Drive Gear Assembly

Repair & overhaul · Magneto drive gear / impulse coupling

From a Wisconsin service manual covering: FM-X4B7D, V-460D, V-461D, V-465D, V460D, V461D, V465, Y-128-S1, YB-85A. Check it applies to your exact model before use.

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Before you start

  • It is possible to be off 180 degrees in mounting the gear with relation to the timing mark.

Procedure

  1. Remove magneto end cap cover.
  2. Turn distributor rotor until it is in firing position for No. 1 cylinder.
  3. Retain rotor in this position and fit drive gear to the impulse coupling lugs so the prick punch mark on front of gear is located as shown.

Source: Wisconsin service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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