Wanco AB Series, Owner'S Manual

Page: 19 / 36

Owner’s Manual 15
Wanco Two-Bearing Belt-Drive Generators
Figure 3-2 Sample installation
■
When mounting the engine and generator, remember that most
engine crankshafts turn counterclockwise (when viewing the
engine shaft straight on).
■
Smaller pulleys require more belt tension to deliver sufficient
horsepower. To reduce the belt’s load on the crankshaft and
bearings, determine the correct pulley size based on the equation
in Figure 3-3.
■
Altitude affects the horsepower performance of all engines. For
every 1000 feet above sea level, engine horsepower is reduced by
3.5%, consequently reducing the generator wattage by 3.5%.
■
If the exact pulley size is not available, you must slightly adjust the
engine speed to compensate for the pulley diameter. It is important
to note that slower engine speed will result in less horsepower. The
result may be a lack of power sufficient to carry the full electrical
load of the generator.
■
Most one- and two-cylinder engines have horsepower rated at 3600
RPM. If the engine and generator both operate at 3600 RPM, the
pulley diameter for the engine and generator will be the same.
Pulleys
Common
baseplate
Rubber mounts
Engine
Generator
Belt