M71518 2. Disconnect spark plug wires (A) from spark plugs. There is one spark plug on each side of the engine. 3. Remove spark plugs from engine. 4. Clean spark plugs carefully with a wire brush. 5. Inspect spark plugs for: · Cracked porcelain. · Pitted or damaged electrodes. · Other wear or damage. NOTE: In Canada, replace spark plugs with resistor-type plugs only. 6. Replace spark plugs as necessary. M39006 7. Check plug gap with a wire feeler gauge. 98