Manual

Concrete Vibrator, Backpack Model WBP50
Page 8 March 2014
To start a cold engine, move the choke lever to the CLOSED
position. To restart a warm engine, leave the choke lever in
the OPEN position.
Turn the engine switch to the ON position.
Set the throttle lever to the SLOW position. Pull the starter
grip lightly until you feel resistance, then pull briskly. Return
the starter grip gently.
OTE:N Do not allow the starter grip to snap back against
the engine. Return it gently to prevent damage to
the starter.
If the choke lever has been moved to the CLOSED position to
start the engine, gradually move it to the OPEN position as
the engine warms up.
MPORTANTI
The engine will not start if the throttle lever is all the way back
in the OFF position. Push the lever forward about 1/2” into the
SLOW position to engage it.
Setting the Engine Speed
Position the throttle lever for the desired engine speed.
Vibrator heads rotate at twice the speed of the engine and
are designed for nominal speeds of 12,000…13,000 RPM
(Engine speed of 6,000…6,500 RPM). Operating at excessive
speeds may reduce the performance or life of the product.
Maximum engine speed will change with the size of the
vibrator head and shaft. Use the engine governor screw to
adjust the throttle range within safe operational limits.
The engine throttle lever is controlled by the orange throttle
lever on the left side of the backpack. The throttle lever
should be set to SLOW for startup, FAST for operation, and
STOP for shutdown.