Porter-Cable 837 Instruction Manual page 12

HOW TO HOLD THE SAW
Exposed metal parts of the tool may be made live if the blade
cuts into live wiring within a wall. Hold the saw as shown in Fig. 7.
TO START AND STOP THE SAW
1. Make sure that the battery pack voltage is the same as that shown on the
specification plate on the tool. Connect the battery pack to the tool.
2. Hold the saw firmly. Squeeze the trigger switch (A) Fig. 8 to start the motor.
Release the trigger switch to stop the motor.
Fig. 8
SWITCH LOCK-OUT
Lock the switch in the "OFF" position when not in use (A) Fig. 9.
To unlock the switch, slide the switch forward (B) Fig. 10. Unlocking the switch
allows the tool to be turned "ON". Squeeze the trigger switch to start the motor.
A
VARIABLE SPEED
The saw is equipped with a variable speed control (0 to 2900 SPM). As the
switch trigger is squeezed, the speed of the saw blade increases.
Use the lower speeds for most metal cutting, and the higher speeds for wood. A
few practice cuts at various speeds (on scrap material), will aid you in choosing
the best speed for obtaining the desired results on your application.
Fig. 9
12
A
B
Fig. 7
Fig. 10