Generac Power Systems NP-40G - Manual (Page 36)

Section 2.1- GENERAL INFORMATION
2. Check the battery. Fill all battery cells to the proper
level with distilled water. DO NOT USE TAP WATER IN
THE BATTERY. If necessary, recharge the battery to a
100 percent state of charge or replace It, If defective.
3. Turn OFF all electrical loads. Start the engine at no-
load and let It warm up.
4. Apply electrical looads to at least 50% of the unit’s
rated capacity.
5. When engine Is thoroughly warmed up, turn off or
disconnect all electrical loads. Then, shut the engine
down.
THE UNIT IS NOW READY FOR SERVICE.
Engine Tuneup
The following procedure may be used as a minor
tuneup. On completion of the procedure, the engine
should run properly. If It does not run properly, additional
checks and repairs are required.
1. Service and repair engine air cleaners, as necessary.
2. Check engine oil level and condition of oil. Add or
change oil as required.
3. Remove shrouding and clean away dirt from the en­
gine cylinder head and cooling fins.
4. Check fuel filters and clean or replace as necessary.
5. Replace the spark plug with a Champion RC12YC (or
equivalent) plug.
a. Set spark plug gap to 0.030 Inch (0.76mm).
b. Install new plug and tighten to 13 foot-pounds (1.8
N-m).
c. If a torque wrench Is not available, tighten spark
plug as tight as possible with fingers and then
(1) If plug is RE-USED, tighten about 1/4 turn more
with a wrench.
(2) If plug Is NEW, tighten it about 1/2 turn more with
a wrench.
6. Check that wiring Is free of breaks, abrasions and are
properly routed.
7. Check for spark as outlined in "Ignition“ section of Part
6 of this manual.
8. Run engine, adjust carburetor If necessary and check
operation.
Page 2.1-3