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Wisconsin — Restoring Compression

Maintenance · cylinder

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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Procedure

  1. Remove spark plugs.
  2. Squirt about one fluid ounce of crankcase oil through each spark plug hole.
  3. Turn engine over several times with starting crank to distribute oil.
  4. Reassemble spark plugs.

Tools required

Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.

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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