Generac G0072100 — Checking Valve Clearance
Maintenance · engine valvetrain
For the Generac G0072100, from the Generac owner's manual.
Applies to: Generac G0072100, Generac G-Force 400 Series engine, Generac G-Force 800 Series engine, Generac G-Force 1000 Series engine
Before you start
- Accidental Start-up. Disconnect the negative battery cable, then the positive battery cable when working on unit.
- Risk of Burn. Allow the engine to cool before performing the following procedure.
Procedure
- Close fuel valve and disconnect battery to avoid accidental startup.
- Remove spark plug wire(s) and position away from spark plug(s).
- Remove spark plug(s).
- Remove the four screws attaching the valve cover. Remove and discard gasket. Repeat for second cylinder if equipped.
- Verify piston is at top dead center (TDC) of its compression stroke (both valves closed).
- Verify valve clearance between each rocker arm and valve stem with a feeler gauge.
- Install replacement valve cover gasket(s).
- Install valve cover(s); tighten fasteners in a cross pattern.
- Install spark plug(s).
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)
- Not required on 14 or 18 kW units with 816cc engine
Full service-parts list: Generac G0072100 →
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.