Sears 270-3250 - Manual (Page 24)

TIMELINE: Every 100 hours or as needed.
The spark plug is important for proper engine operation. A good spark plug should be
intact, free of deposits, and properly gapped. To inspect your spark plug:
1. Pull on the spark plug cap to remove it.
2. Unscrew the spark plug from the engine using the spark plug wrench included
with this product (see figure 20).
3. Visually inspect the spark plug. If it is cracked or chipped, discard and replace
with a new spark plug. Measure the plug gap with a gauge (see figure 21). The
gap should be 0.7-0.8mm (0.028-0.031 in).
4. If you are re-using the spark plug, use a wire brush to clean any dirt from around
the spark plug base and then re-gap the spark plug.
5. Screw the spark plug back into its place on the engine using the spark plug
wrench. Replace the spark plug cap.
Spark Plug Maintenance
y- 0. 7-0-. S im
U (0.02^-0.(331 in)
Figure 20- Removing the spark plug Figure 21- Measuring the spark plug gap
Emptying the Gas Tank
TIMELINE: Before storing the snow thrower for extended periods of time.
To drain the snow thrower engine of gas:
1. Make sure the engine is turned off.
2. Place a gas safe container under the carburetor (see the “Snow Thrower Parts
Diagram” to reference this part).
3. Move the fuel valve lever to the “on” position.
4. Unscrew the outward facing bolt from the bottom of the carburetor (see figure
22). Gas should start to empty from this point.
5. Catch the emptying gas in the gas safe container until all the gas has drained.
6. Turn the fuel valve to the “off’ position.
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