21
4.
Slide the mulch plate clockwise to install it or
counterclockwise to remove it.
5.
Secure the mulch plate with the cap screw (Fig. 36).
6.
Connect wire to the spark plug.
Note:
Use only a genuine Lawn-Boy replacement cutting
blade. Other blades may strike the mulch plate when you
start and run the engine.
Mulching Operation
To achieve the best mulching action, set the cutting height
so that no more than a third of the grass stem is cut off or
a maximum of one-inch (25 mm) long clippings. If you
attempt to mulch more or if the grass is very lush, the
mulching action will be poor. Under these conditions, use
the side discharge or catch the grass clippings instead of
mulching them.
Troubleshooting
Lawn-Boy designed and built your lawn mower for trouble-free operation. Check the following components and items
carefully. If a problem continues, see an Authorized Service Dealer.
PROBLEM
CORRECTIVE ACTION
Engine does not start
1. Fill the fuel tank with a fresh gasoline-and-oil mixture.
2. Press the primer three times.
3. Connect the wire to the spark plug.
4. Clean the spark plug, check the spark plug gap, and replace
the spark plug if it is damaged.
Engine starts hard or loses power
1. Drain and fill the fuel tank with a fresh gasoline-and-oil mixture.
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p
2. Clean the fuel cap vent hole.
3. Clean or replace the air filter element.
4. Clean the lawn mower discharge chute.
5. Clean the underside of the lawn mower deck.
6. Clean the spark plug, check the spark plug gap, and replace
the spark plug if it is damaged.
Engine runs rough
1. Connect the wire to the spark plug.
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g
2. Clean the spark plug, check the spark plug gap, and replace
the spark plug if it is damaged.
3. Clean or replace the air filter.
Lawn mower or engine vibrates
i l
1. Balance the blade.
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excessively
2. Tighten the blade mounting nut.
3. Clean the lawn mower discharge chute.
4. Clean the underside of the lawn mower deck.
5. Tighten the engine mounting bolts.
Uneven cutting pattern
1. Place all four wheels at the same height.
2. Sharpen and balance the blade.
3. Change the mowing pattern.
4. Clean the underside of the lawn mower deck.
Discharge chute plugs
1. Raise the cutting height.
2. Allow the grass to dry before mowing.
3. Clean the underside of the lawn mower deck.
