Wisconsin — Spark Plug Service
Maintenance · spark plugs
From a Wisconsin service manual covering: V-460D, V-461D, V-465D, V460D, V461D, V465, VH4, W4-1770, vg4d. Check it applies to your exact model before use.
Applies to: Wisconsin VH4
Procedure
- Remove spark plugs and clean and re-gap.
- Check spark plug gap with a wire type gauge and regap.
- Use a new gasket when mounting either old or new plugs and thoroughly clean threads in cylinder head before installation.
- Tighten spark plugs to 22 foot pounds torque. If torque wrench is not available, tighten plug until it begins to seat on the gasket, then turn 1/2 to 3/4 of a turn more.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Spark plug gap 0.030 of an inch
- Champion 14 mm No. N-12Y or equal
- Torque 22 foot pounds
- Replace approximately every 350 hours
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.