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Dwell for 0.15 gap 1947 8n ford tractor?

The spark plug gap for a 1947 8N Ford tractor is 0.025 inches.

Here are the steps on how to set the spark plug gap:

1. Remove the spark plug from the cylinder head.

2. Use a feeler gauge to measure the gap between the center electrode and the side electrode.

3. If the gap is too small, carefully bend the side electrode outward until the gap is correct.

4. If the gap is too large, carefully bend the side electrode inward until the gap is correct.

5. Reinstall the spark plug in the cylinder head.

It is important to set the spark plug gap correctly to ensure that the engine runs properly. If the gap is too small, the spark will not be strong enough to ignite the fuel mixture. If the gap is too large, the spark will be too weak and will not ignite the fuel mixture.