Lawnmower Troubleshooting WB20ZB7 and WB450A models |
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PROBLEM |
CAUSE |
CORRECTION |
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Does not start |
1.Dirty air filter. |
1.Clean/replace air filter. |
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2.Out of fuel. |
2.Fill fuel tank. |
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3.Stale fuel. |
3.Drain tank and refill with fresh clean fuel. |
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4.Water in fuel. |
4.Drain fuel tank and carburetor and refill tank with fresh gasoline. |
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5.Spark plug wire is disconnected. |
5.Connect wire to plug |
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6.Bad spark plug. |
6.Replace spark plug. |
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7.Loose blade or broken blade adapter. |
7.Tighten blade bolt or replace blade adapter. |
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8.Control bar in released position. |
8.Depress control bar to handle. |
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9.Control bar defective. |
9.Replace control bar. |
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Loss of power |
1.Rear of lawn mower housing of cutting blade dragging in heavy grass. |
1.Set to “Higher Cut” position. |
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2.Cutting too much grass. |
2.Set to “Higher Cut” position. |
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3.Dirty air filter. |
3.Clean/replace air filter. |
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4.Buildup of grass, leaves, and trash under mower. |
4.Clean underside of mower housing. |
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5.Too much oil in engine. |
5.Check oil level. |
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6.Walking speed too fast. |
6.Cut at slower walking speed. |
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Poor cut-uneven |
1.Worn, bent or loose blade. |
1.Replace blade. Tighten blade bolt. |
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2.Wheel heights uneven. |
2.Set all wheels at same height. |
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3.Buildup of grass, leaves and trash under mower. |
3.Clean underside of mower housing. |
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Excessive vibration |
1.Wom, bent or loose blade. |
1.Replade blade. Tighten blade bolt. |
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2.Bent engine crankshaft. |
2.Contact a qualified service center. |
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Starter rope hard to pull |
1.Engine flywheel brake is on when control bar is released. |
1.Depress control bar to upper handle before pulling starter rope. |
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2.Bent engine crankshaft. |
2.Contact a qualified service center. |
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3.Blade adapter broken. |
3.Replace blade adapter. |
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4.Blade dragging in grass. |
4.Move lawn mower to cut grass or to hard surface. |
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Grass catcher not filling(If so equipped) |
1.Cutting height too low. |
1.Raise cutting height. |
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2.Lift on blade worn off. |
2.Replace blade. |
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3.Catcher not venting air. |
3.Clean grass catcher. |
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Hard to push |
1.Grass is too high or wheel height is too low. |
1.Raise cutting height |
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2.Rear of lawn mower housing/blade dragging in grass. |
2.Raise rear of lawn mower housing one (1) setting higher. |
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3.Grass catcher too full. |
3.Empty grass catcher. |
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4.Handle height position not right for you. |
4.Adjust handle height to suit. |
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Loss of drive |
1.Belt wear. |
1.Check/replace drive belt. |
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2.Belt off of pulley. |
2.Check/reinstall drive belt. |
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4.Dirt in drive pinions. |
4.Clean drive pinions. |