Generac — Adjust Valve Clearance
Adjustments · valve train
From a Generac owner's manual — check it applies to your exact model before use.
Applies to: Generac 7.5 kW PowerPact
Procedure
- Cool engine before adjustment
- Remove enclosure lid, fasteners, back panel
- Remove spark plug wire and spark plug
- Remove 4 screws attaching valve cover, discard gasket
- Loosen rocker jam nut with 10mm wrench
- Turn pivot ball stud while checking clearance with feeler gauge to 0.002-0.004 in (0.05-0.1 mm)
- Hold pivot ball stud, tighten rocker arm jam nut to 174 in-lbs (19.68 Nm)
- Recheck clearance
- Install new valve cover gasket
- Install valve cover, tighten fasteners in cross pattern to 35-62 in-lbs (4-7 Nm)
- Install rubber plug into fan screen
- Install spark plug and wire
- Install back panel and enclosure top lid
- Place generator in AUTO
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- valve clearance 0.002-0.004 in (0.05-0.1 mm)
- jam nut torque 174 in-lbs (19.68 Nm)
- valve cover fastener torque 35-62 in-lbs (4-7 Nm)
Full service-parts list: Generac 7.5 kW PowerPact →
Source: Generac owner's 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.