Wisconsin — Valve Tappet Adjustment
Adjustments · valve train
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.
Browse Wisconsin generators & specs →
Procedure
- Remove spark plugs to ease turning.
- Identify exhaust rocker arm right, inlet left when facing side.
- Measure clearance between valve top and rocker arm nose with feeler gauge.
- Turn tappet adjusting screw clockwise to decrease clearance, counter-clockwise to increase.
- Adjust No. 1 inlet, then No. 3 inlet.
- Return to No. 1 cylinder and adjust exhaust, then No. 3 exhaust.
- Repeat No. 2 and No. 4 bank starting with No. 4 inlet.
- Mark each rocker arm with chalk when completed.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Inlet 0.008 inch cold
- Exhaust 0.014 inch cold
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.