|
Figure 6
with Table 6 show an example of a throttle system. The throttle system allows
you, the driver, to control the speed at which the engine runs. As the throttle
control on the engine is moved forward, the engine speed (RPM) increases.
Again, as with the braking system, the system becomes more complex when a
spring return is added to release the the throttle when the driver takes their
foot off the pedal. Unlike the braking system, however, a spring return is
required on the throttle system for the driver's safety. |
|
In order
for the throttle to release to the idle position, the extension spring must be
pulling against the force you provide to increase the throttle speed. To
accomplish this task, mount one end of the spring to a fixed object on the
frame, the other end to the throttle rod. The fixed end should be further
towards the back of the go-kart than the movable end of the spring if using an
EXTENSION spring, otherwise a COMPRESSION spring should be placed between a
fixed stop and the rod end (see Figure 6). |
|
To
control the range of throttle movement, stops need to be placed on the throttle
rod or cable (Figure 6 shows stops on the rod). In general, a stop needs to be
larger than the opening through which if is passing. A wire stop only needs to
be larger than the housing through which the wire posses. |
|
The
throttle cable itself is attached to the throttle control on the engine, and
the other end is attached to the foot pedal either directly or by a throttle
control rod. A throttle control rod, as shown in Figure 6, is simply a rigid
connection from the foot pedal to the throttle cable. Both the throttle control
cable and/or rod must be able to move back and forth freely, but with o limited
range of motion as mentioned previously. |
|
If
your engine has manual friction
control throttle, you will need to
convert if to an adjustable governor
control in order to adjust the throttle
with a foot pedal. To do this you
will need to follow these steps: |
 |
|
1.) Remove the air cleaner from the engine
in order to get at the manual friction control.
2.)
Remove the bolt shown at right.
3.)
Remove the link as shown and discard.
Your
engine is now ready to accept a foot pedal controlled throttle cable.
|
|
Figure 7
with Table 7 show how the throttle cable is attached to the Briggs and Stratton
engine. This assembly requires Northern Hydraulics kit #2449, which bolts to
the governor slide below the gas tank on the side of the engine. With this kit
attached to your engine's throttle control, your throttle will spring back to
the idle position when released. The throttle system shown in Figure 6 provides
a stronger spring to accompany the spring in kit #2449, but is not necessary. |
|
The kill
button switch allows you to shut off the engine from the drivers seat, which is
important for the driver's safety. Mount the switch on the go-kart frame where
if is easy to reach from the drivers seat. The spade end of the wire attaches
to the ground stud on the control panel of the engine underneath the gas tank
(see Figure 7); most engine manuals will inform you of where this ground stud
is located on the engine. When the button on the switch is pushed, the engine
is grounded and kills the electric current in the engine, thus turning it off.
On some engines it may be necessary to remove the wire between the stud and the
ground switch, otherwise every time the throttle is released the engine will
quit. |
|
 |
|
|
Dia.# |
Item # |
Description |
Qty. |
| 1 |
13820 |
Gas Pedal |
1 |
| 2 |
13823 |
Throttle Control Rod Kit |
1 |
| 3 |
13824 |
Kill Button Switch |
1 |
|
|
 |
|
 |
|
|
Dia.# |
Item # |
Description |
Qty. |
| -- |
2449 |
Throttle Cable Spring Kit |
1 |
| 1 |
-- |
Spring Throttle Return |
1 |
| 2 |
-- |
Spring Anchor |
1 |
| 3 |
-- |
Cable Clamp |
1 |
| 4 |
-- |
Hold Down Screw |
1 |
| 5 |
-- |
Stop Screw |
1 |
| 6 |
-- |
Cable Retainer |
1 |
|
