Generac Power Systems MC - Manual (Page 39)

A.)- Adjust Carburetor as outlined in Test 23, The Carburetor must be
adjusted BEFORE attempting to adjust the Governor,
RESULT Problem is corrected...........................Test completed
Engine ’’hunts’’ and/or a-c voltage
or frequency is incorrect.................Go to Paragraph B
_ Carburetor
Throttle Lever
TEST 32;- GOVERNOR
B,)-Make sure Governor Spring is
connected to Governor Arm and to
Governor Adjusting Screw, Loosen
Engine Governor Shaft Clamp Nut
and turn Engine Governor Shaft
counterclockwise as far as it
will go. Then tighten Governor
Shaft Clamp Nutand torque to 110
inch-pounds.
Engine Governor
Shaft Clamp Bolt,
Nut and Washers
Engine Governor
Shaft
RESULT:- Engine runs normal, provides
62 Hertz at no—load.......................... Test completed
Engine hunts and/or a-c voltage
or frequency is incorrect........ ........ Go to Paragraph C
C,)- With engine running, adjust hex nuts at end of Governor Adjust­
ing Screw to obtain 62 Hertz at no-load. One hex nut serves as a jam
nut - make sure this nut is tight when 62 Hertz is obtained,
RESULT:- Engine runs normal,,,,.,,"................ ...Test completed
Engine hunts............... Set Carburetor for richer mixture
NOTE
All mechanical governors have a normal offspeed fluctuation,
This is the reaction time of the governor,
TEST 33;- CHECK FREQUENCY
Use an accurate Frequency Meter to check alternator output frequency.
Frequency should be 62 Hertz at no-load. With a normal electrical load
applied, frequency should be 59-62 Hertz and stable (disregarding the
normal offspeed fluctuation).
2.2-17