Use and Care Manual

Operating Instructions & Parts Manual

2 Inch & 3 Inch Water Pump

Spark Plug Service

Recommended spark plugs: BPR6ES (NGK) W20EPR-U (DENSO)

Notice: An incorrect spark plug can cause engine damage.

1. Disconnect the spark plug cap, and remove any dirt from around the spark plug area.

2. Remove the spark plug with a 13/16-inch spark plug wrench.

3. Inspect the spark plug. Replace it if the electrodes are worn, or if the

insulator is cracked or chipped.

4. Measure the spark plug electrode gap with a suitable gauge. The gap

should be 0.028-0.031 in. Correct the gap, if necessary, by carefully

bending the electrode.

5. Install the spark plug carefully, by hand, to avoid cross threading.

6. After the spark plug is seated, tighten with a 13/16-inc spark plug

wrench to compress the sealing washer.

If reinstalling the used spark plug, tighten 1/8-1/4 turn after the spark

plug is seated.

If installing a new spark plug, tighten 1/2 turn after the spark plug is

seated.

Note: A loose spark plug can overheat and damage the

engine. Over-tightening the spark plug can damage the threads in the

cylinder head.

7. Attach the spark plug cap.

Spark Plug Wrench

Sealing

Washer

0.028-00.031 in.

(0.70-0.80 mm)