Cooling System; Attention After Submersion; Corrosion Protection; Out Of Service Procedure - Generac Power Systems 7kW Air-cooled, Automatic Standby Generators Owner's Manual

Maintenance
To adjust valve clearance (if necessary):
• Make sure the engine is at 60° to 80° F.
• Make sure that the spark plug wire is removed from the spark
plug and is out of the way.
• Remove the four screws attaching the valve cover.
• Loosen the rocker jam nut. Use a wrench to turn the pivot ball
stud while checking clearance between the rocker arm and the
valve stem with a feeler gauge. Correct clearance is:
• Intake — 0.005-0.007 inch (0.13-0.17 mm)
• Exhaust — 0.007-0.009 inch (0.18-0.22 mm)
Hold the rocker arm jam nut in place as the pivot ball stud is
turned.
When valve clearance is correct, tighten the rocker arm jam nut.
Tighten the jam nut to 70 to 106 in/lbs. torque. After tightening the
jam nut, recheck valve clearance to make sure it did not change.
• Install new valve cover gasket.
• Re-attach the valve cover.
Start all four screws before tightening or it will not be possible
to get all the screws in place. Make sure the valve cover gasket
is in place.
• Install spark plug.
• Re-attach the spark plug wire to the spark plug.
4.8

COOLING SYSTEM

Air inlet and outlet openings in the generator compartment must
be open and unobstructed for continued proper operation. This
includes such obstructions as high grass, weeds, brush, leaves
and snow.
Without sufficient cooling and ventilating air flow, the engine/gen-
erator quickly overheats, which causes it to quickly shut down.
(See Figure 4.5 for vent locations.)
Make sure the door and roof are in place during operation as
running the generator with them removed can affect cooling air
movement.

The exhaust from this product gets extremely
hot and remains hot after shutdown. High
grass, weeds, brush, leaves, etc. must
remain clear of the exhaust. Such materi-
als may ignite and burn from the heat of the
exhaust system.
20
NOTE:
NOTE:
Figure 4.5 – Cooling Vent Locations
AIR OUTLET
4.9 ATTENTION AFTER
SUBMERSION
If the generator has been submerged in water, it MUST NOT be
started and operated. Following any submersion in water, have
a Dealer thoroughly clean, dry and inspect the generator. If the
structure (ex. home) has been flooded, it should be inspected by
a certified electrician to ensure there won't be any electrical prob-
lems during generator operation or when utility is returned.

4.10 CORROSION PROTECTION

Spray engine linkages with a light oil such as WD-40.

4.11 OUT OF SERVICE PROCEDURE

4.11.1 REMOVAL FROM SERVICE
If the generator cannot be exercised every seven days, and will
be out of service longer than 90 days, prepare the generator for
storage as follows:
1. Start the engine and let it warm up.
2. Close the fuel shutoff valve in the fuel supply line and allow
the unit to shut down.
3. Once the unit has shut down, switch to the OFF position.
4. Set the generator's main circuit breaker to its OFF (or OPEN)
position.
5. Set the AUTO/OFF/MANUAL switch to OFF and turn off the util-
ity power to the transfer switch. Remove the 7.5A fuse from
the generator control panel. Disconnect the battery cables as
outlined in "General Hazards".
6. While the engine is still warm from running, drain the oil
completely. Refill the crankcase with oil. See "Engine Oil
Recommendations".
AIR INTAKE
AIR OUTLET
AIR INTAKE