Closed Throttle Or Idle Adjustment; Engine Rpm Adjustment - Pioneer 1200 Maintenance Service Manual

14
FUEL SYSTEM
IDLE
SCREW
Figure 14-8 Idle Screw

CLOSED THROTTLE OR IDLE ADJUSTMENT

1. With the engine running and the Forward/Reverse handle in NEUTRAL, position a tachometer (CCI P/
N 1016112) close to the spark plug wire and plug, and adjust the low idle screw on the carburetor until
the tachometer reads 1200 to 1250 RPM (Figure 14-8, Page 14-10).

ENGINE RPM ADJUSTMENT

∆
DANGER
• Do not operate gasoline vehicle in an enclosed area without proper ventilation. The engine
produces carbon monoxide, which is an odorless, deadly poison.
1. Adjust the governor, then proceed to step 3. See Governor Cable Installation and Adjustment on
page 14-7.
2. With the engine running at normal operating temperature, and the Forward/Reverse handle in NEU-
TRAL, position a tachometer (CCI P/N 1016112) close to the spark plug wire and plug, and adjust the
high speed RPM. Press the accelerator pedal to the floor, the tachometer should read:
2.1. After the accelerator pedal and rod are adjusted, the final governed engine RPM should be set to:
FE400 Engine: 3850 (±30) RPM. See Engine RPM Adjustment, Section 14, Page 14-10.
3. To reduce RPM, loosen the accelerator cable retaining nut on the outside of the electrical box wall and
tighten the retaining nut on the inside of the wall until the specified RPM is reached (Figure 14-5,
Page 14-8). To increase RPM, loosen the cable retaining nut inside the electrical box and tighten the nut
outside the box until the desired RPM is reached.
4. Be sure both retaining nuts are locked against the electrical box and then check the RPM again. If the
RPM needs to be adjusted, repeat step 3.
5. If more adjustment is required than the cable housing will allow, make sure the spring on the other end
of the accelerator cable is properly positioned. Excessive belt and torque converter wear can also pre-
vent proper RPM adjustment. Check them for excessive wear. See Section 17 – Torque Converter.
Page 14-10 2003 Pioneer 1200/1200SE Gasoline Vehicle Maintenance and Service Manual
Engine Control Linkage