Valve Clearance; Manual Choke Operation - Westinghouse iGen4500 User Manual

MAINTENANCE
8. Put a teaspoon of engine oil into the cylinder and pull the
recoil handle until resistance is felt. At this position the
piston is coming up on its compression stroke and both
valves are closed. Storing the engine in this position will
help prevent internal corrosion. Return the recoil handle
gently.
9. Reinstall the spark plug. Leave the spark plug boot
disconnected to prevent accidental starting.
10. Install the engine service cover.

VALVE CLEARANCE

Checking and adjusting valve clearance must be done
when the engine is cold.
1. Remove the rocker arm cover and carefully remove
the gasket. If the gasket is torn or damaged, it must be
replaced.
2. Remove the spark plug so the engine can be rotated
more easily.
3. Rotate the engine to top dead center (TDC) by pulling
the recoil handle slowly. Looking through the spark plug
hole, the piston should be at the top (both valves are
closed).
4. Both the rocker arms should be loose at TDC on the
compression stroke. If they are not, rotate the engine
360°.
5. Insert a feeler gauge between the rocker arm and the
valve stem to measure valve clearance.
Valve Stem
Intake Valve
0.0031 – 0.0047 in
Valve Clearance
(0.08 – 0.12 mm)
Torque
6. If an adjustment is necessary, hold the rocker arm pivot
and loosen the pivot adjusting nut.
7. Turn the rocker arm pivot to obtain the specified
clearance. Hold the rocker arm pivot and re-tighten the
pivot adjusting nut to the specified torque.
Torque: 106 inch-pound (12 N•m)
24 | Westinghouse Outdoor Power Equipment, LLC
NOTICE
Rocker Arm
Pivot
Adjusting Nut
Rocker Arm Pivot
Exhaust Valve
0.0051 – 0.0067 in
(0.13 – 0.17 mm)
8-12 N•m 8-12 N•m
8. Perform this procedure for the other valve.
9. Install the gasket, rocker arm cover, and spark plug.

MANUAL CHOKE OPERATION

If the battery is dead or disconnected, you may need to set
the choke by hand for proper operation.
1. Remove the engine service cover.
2. Locate the small black choke lever on top of the
carburetor.
3. To close the choke for cold starting: Use a screwdriver
to push the black lever toward the front of the generator.
4. Start the generator. The start-up sequence should
automatically open the choke. If the choke does not
open automatically, push the choke manually to open it.
Certain ambient temperatures and environments may
require you to close the choke halfway for a successful
start.
NOTICE