Symptom Tree t080
| Cause | Correction |
|---|
|
Load is excessive for engine horsepower rating |
Reduce the load on the engine. Refer to OEM specifications. |
 |
|
Tachometer is not calibrated or is malfunctioning |
Compare the tachometer reading with a handheld tachometer or an electronic service tool reading. Calibrate or replace the tachometer as necessary. Refer to the OEM service manual. |
|
|
Air intake or exhaust leaks |
Inspect the air intake and exhaust systems for air leaks. Refer to the OEM Service Manual. |
|
|
Air intake system restriction is above specification |
Inspect the air intake system for restriction. Replace the air filter. Refer to the OEM Service Manual. |
|
|
Engine power output is low |
Refer to the Engine Power Output Low symptom tree. |
|
|
Fuel leak |
Check the fuel lines, fuel connections, and fuel filters for leaks using the combustible gas detector service tool. Refer to Procedures 006-064 and 006-063. |
|
|
Ignition system is malfunctioning or misfiring |
Check the ignition system. Refer to Procedure 013-012, 013-014 or 013-016 and the Ignition System OEM Literature. |
|
|
Low or no fuel pressure at the fuel filter (primary pressure) |
Increase output pressure from the primary regulator. Refer to Procedure 005-042. |
