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Pre-Cleaner Air Filter

Figure 40. Air Filter Service

REPLACE SPARK PLUG

Service Interval: Yearly

Spark Plug Gap: .030” (.76mm)

1. Stop the engine and allow it to cool.

2. Clean the area around the spark plug.

3. Remove the spark plug.

4. Check the spark plug gap. It should be .030” (see

Figure 41).

5. Reinstall the plug into the cylinder head. Torque the

plug to 180 in. lbs (20 N.m.).

CLEAN COMBUSTION CHAMBER -

BRIGGS & STRATTON MODELS

Service Interval: 100-400 hours

In order to maintain emission compliance, we

recommend that after every 100-400 hours of operation

you have an authorized Briggs & Stratton Service Center

remove combustion deposits from the cylinder, cylinder

head, top of piston, and around the valves.

Figure 41. Spark Plug Gapping

Pre-Cleaner Service

NOTE: Replace a worn or damaged pre-cleaner.

1. Figure 40. Wash the pre-cleaner in liquid detergent

and water.

2. Squeeze the pre-cleaner dry and saturate with

engine oil. Remove all excess oil by squeezing the

pre-cleaner in an absorbent cloth.

Air Filter Service

NOTE: Replace a worn or damaged air filter.

1. Figure 40. If stamped “Washable,” the filter can be

washed with warm water and mild soap.

2. Rinse with tap water with the screen side UP allowing

dirt and debris to filter out.

3. Allow the filter to dry overnight before reinstalling.

26hp

18.5 &

21hp

Snapper 150Z Series User Manual

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