Engine Spits Back in Carburetor

We listed possible causes of the problem engine spits back in carburetor:

1. Cold engine or cold mixture
2. Lean mixture
3. Air leaks in manifold
4. Air leaks around intake valve stems
5. Weak valve springs
6. Sticking valves
7. Spark plug wires crossed or incorrectly connected
8. Ignition out of time or retarded
9. Camshaft out of time
10. Overheating
11. Carbon
12. Improper grade of fuel
13. Water in gasoline

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