Maintaining The Spark Plugs; Valve Clearance Adjustment; Check Valve Clearance - Generac Power Systems 15 kW EcoGen Owner's Manual

Maintaining the Spark Plugs

Check and replace the spark plugs as necessary.
WARNING
Electrical shock. Do not disconnect spark
plug wires with engine running. Doing so
could result in death or serious injury.
WARNING
Moving Parts. Avoid AVR fan housing for 80
minutes after generator shutdown. Fan
operates even if fuse is removed. Rotating fan
blades could result in death or serious injury.
WARNING
Electric shock. AVR maintains electrical
charge after generator shutdown. Wait five
minutes before AVR removal. Failure to do
so could result in death or serious injury.
1. With the generator shut down, lift the lid and
remove the front panel.
2. See "A" in Figure
AVR filter housing from back panel.
3. Clean the area around the base of the spark plugs
to keep dirt and debris out of the engine.
4. Remove spark plug cables from spark plug terminals.
5. Remove the spark plugs and check the condition.
Install new plugs if the old spark plugs are worn or
if reuse is questionable.
6. Clean the spark plugs by scraping or washing with
a wire brush and commercial solvent. Do not blast
the spark plugs to clean.
7. See Figure 4-14. Check spark plug gap using a
wire feeler gauge. Replace the spark plug if the
gap is not within specification as provided in
Section 2 — Specifications.
Figure 4-14. Checking Spark Plug Gap
8. Install the spark plugs and torque to 18.4 ft-lbs (25
Nm).
9. Attach spark plug cables to spark plug terminals.
Owner's Manual for 60 Hz EcoGen™ Generators
(000140)
(000222a)
(000223)
4-12. Remove screw to release
000211
10. Install AVR filter housing.
11. Install front panel and lower the generator lid.

Valve Clearance Adjustment

Check the valve clearance after the first 25 hours of
operation, then as per recommended service interval
(See Service Schedule). Adjust if necessary.
Important: Please contact an Independent Authorized
Service Dealer for service assistance. Proper valve
clearance is essential for prolonging the life of the
engine.

Check Valve Clearance

1. Verify that engine is at ambient air temperature.
NOTE: Allow the AVR to complete its cool down before
disconnecting power, which is indicated by the green light
turning off.
WARNING
Accidental Start-up. Disconnect the negative battery
cable, then the positive battery cable when working
on unit. Failure to do so could result in death
or serious injury.
WARNING
Electric shock. AVR maintains electrical
charge after generator shutdown. Wait five
minutes before AVR removal. Failure to do
so could result in death or serious injury.
2. See Figure 4-12. Remove screw to release AVR
filter housing from back panel. Remove AVR filter
housing.
3. See Figure 4-15. Depress external latch to
disconnect 4-pin connector (A) from AVR.
4. See Figure 4-16. Remove three screws (B) to
release AVR fan from AVR.
A
Figure 4-15. Remove AVR Fan Connector
Maintenance
(000130)
(000223)
001404
29