Section 14 - Fuel System; General Information; Carburetor; Main Jet Elevation/Size Chart - Pioneer 1200 Maintenance Service Manual

SECTION 14 – FUEL SYSTEM
∆
DANGER
• See General Warning, Section 1, Page 1-1.
∆
WARNING
• See General Warning, Section 1, Page 1-1.

GENERAL INFORMATION

The FE400 engines are equipped with a float bowl type carburetor with fixed jets that require no adjustment.
The size of the jets are determined by the altitude where the engine will be operating. The engines are
equipped with the jets sized for the operating elevation of customer destination at the time of manufacture.

CARBURETOR

See General Warning, Section 1, Page 1-1.
Before suspecting the carburetor as the cause of poor engine performance, make sure the fuel and ignition
systems are in proper operating condition. Check the following items:
• Spark plug and gap condition. See Spark Plug, Section 13, Page 13-1.
• Air filter element. See Air Filter on page 14-15.
• Fuel filters. See Fuel Filters on page 14-16.
• Choke and air intake system (for restriction of air flow). See Choke and Air Intake System on
page 14-11.
• Fuel pump. See Fuel Pump Removal on page 14-19.
• Fuel lines (from fuel tank to filter to pump to filter to carburetor). See Fuel Lines on page 14-26.
• Exhaust system (for restrictions). See Section 15 – Exhaust System.
If the carburetor floods or leaks fuel at the float bowl gasket or carburetor vent tube, the fuel inlet valve could
be worn or dirty or have a damaged float that has filled with fuel and sinks.
The following chart lists the elevation ratings for various jet sizes. No adjustment is required for the pilot jet. If
the vehicle idles rough, turn the pilot air screw out until the vehicle idles smoothly.

MAIN JET ELEVATION/SIZE CHART

ALTITUDE
0-3280 ft.
(0-1000 m)
3280-6562 ft.
(1000-2000 m)
6562 ft. and over
(2000 m and over)
2003 Pioneer 1200/1200SE Gasoline Vehicle Maintenance and Service Manual
FE400 ENGINE
MAIN JET SIZE
88
85
82
14
Page 14-1