SECTION 10 - FUEL SYSTEM
10.1 FUEL SYSTEM TROUBLESHOOTING
The following troubleshooting chart is to be used to isolate fuel system problems and give possible causes are corrective action responses
The troubleshooting key is generic and can be used for several types of transmissions. Use only those possible causes and corrective actions that apply to the unit.
TROUBLE | POSSIBLE CAUSES | CORRECTIVE ACTION |
| (Refer to Key Below) |
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Hard Starting | 1, 3, 4, 6, 11, 12, 14, 16, 17, 18 | clean, repair or replace |
Fuel Leak at Carburetor | 5, 7, 17 | repair or replace |
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Engine Floods | 5, 15, 17 | repair or replace |
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Will not idle | 1, 2, 3, 6 | repair or replace |
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Rich idle | 1, 6, 14 | repair or replace |
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idles with Needle Closed | 14 | repair or replace |
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Hunts Erratic Idle | 2, 3, 6, 7, 12, 13, 14, 15, 18 | repair or replace |
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Idles Fast Lean | 2, 3, 7 | repair or replace |
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Will Not Accelerate | 1, 6, 11, 12, 14, 15, 16 | repair or replace |
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Over Rich Acceleration | 1, 15 | repair or replace |
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Hesitates | 2, 6, 11, 12, 16 | repair or replace |
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Will Not Run at High Speed | 1, 11, 12, 14, 16 | repair or replace |
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Low Power | 1, 3, 11, 14, 15, 16, 17, 18 | repair or replace |
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Hunts at High Speed | 3, 6, 7, 12, 14, 15, 16, 18 | repair or replace |
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Runs With Needle Closed | 14 | repair or replace |
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Engine Overspeeds | 2, 3, 7, 14 | repair or replace |
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TROUBLESHOOTING KEY
1Plugged Air Filter
2Leaky Carburetor Gasket
3Throttle or Choke Shaft Worn
4Choke Not Functioning Properly
5Plugged Atmospheric Vent
6Air Bleed Restricted
7Damaged or Leaky "O" Rings
8Damaged Diaphragm
9Stuck or Dirty Ball Check
10Diaphragm Upside Down
11Plugged Tank or Vent
12Fuel
13Idler Port Restricted
14Damaged Adjustment Needle and Seat
15Incorrect Float Height
16Main Nozzle Restricted
17Dirty, Stuck Needle and Seat
18Fuel Inlet Plugged
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