Honeywell HW3000 User Manual

Honeywell Portable Electrical Generator Service Manual

7-7

Remove the cylinder head cover and carefully remove 
the gasket for re-use. (Inspect and replace gasket, if 
necessary.)

Remove the spark plug to reduce engine compres-
sion resistance.

Turn the engine crankshaft using the recoil starter, 
positioning engine at top, dead center, of the com-
pression stroke. This can be verified by the piston 
position in the cylinder.

Insert a feeler gauge between the rocker arm and 
valve spring to measure valve lash.

Hold the rocker arm pivot and loosen the lock nut (see 
B in illustration).

Turn the rocker arm pivot (see C in illustration) to 
obtain specified valve lash.

Retighten the lock nut while holding rocker arm pivot 
and torque to 12 N•m (9 lb. ft.).

Check valve lash again after tightening lock nut.

Repeat steps 4 through 7, as needed, until valve lash 
is within specifications.

Reassemble the spark plug, cylinder head cover, and 
gasket.

Start the engine and run with no load.

Attach a frequency meter and adjust the limiting 
screw on the governor stop to 62.5 Hz ± 0.5.

Stop the engine.

If frequency is out of range, see the “GOVERNOR 
RANGE ADJUSTMENT” procedure below.

Repeat steps 1 through 3. If frequency still out of 
range, see ENGINE DIAGNOSTICS (ALL MODELS), 
page 8-10 

Remove the generator control panel for access.

Loosen the nut on the governor arm pinch bolt (see 
illustration).

Rotate the governor arm shaft counter-clockwise until 
the throttle is completely open and hold in position.

Tighten the nut on the governor arm pinch bolt to 
maintain position.

Confirm the governor arm and throttle move smoothly 
and do not bind.

Reinstall the generator control panel.

Valve lash inspection and adjustment must be performed 
with the engine cold.

FIGURE 7-17:  Lock Nut Location

Standard valve lash

IN.

0.005±0.001 in
(0.125±0.025 mm)

EX.

0.007±0.001 in 
(0.175±0.025 mm)

TABLE 7-5. Standard Valve Lash

12 N•m (9 lb. ft.)

To increase valve lash, 
screw pivot nut out.

To decrease valve lash, 
screw pivot nut in.

30 N•m (22 lb. ft.)

FIGURE 7-18:  Governor Arm Assembly