| Problem: Engine Won't Start |
| Airflow is restricted |
| Fuel doesn't reach the carburetor |
| Engine and/or fuel system has an air leak |
| Fuel mixture needles not properly set |
| Glow plug fails to function |
| |
| Problem: Engine Starts, then dies |
| Idle is set too low |
| Low-speed needle is set to rich |
| Low-speed needle is set to lean |
| Clutch is binding |
| Glow plug is loose |
| Glow plug is fouled |
| Piston and sleeve are worn |
| Damaged bearings in the clutch bell |
| |
| Problem: Engine bogs when given full throttle |
| Low-speed needle is set to rich |
| Clutch engages too quickly |
| Glow plug is too cold |
| |
| Problem: Engine doesn't idle correctly |
| Engine might have air leak |
| Low-speed needle is set to lean |
| |
| Problem: Engine bogs or dies at high speed |
| High-speed needle is set to lean |
| Fuel flow is restricted |
| Piston and sleeve are worn |
| |
| |
