Loss of Power After Blade Engagement on My Husqvarna Lawn Mower

Tough Grass

• Survey the grass you are cutting to see if it’s stopping your blades from spinning. Grass that’s full of thatch or natural debris will prevent rotation, thus stressing the engine and possibly overloading it. The same can happen if the grass is too high or you are mowing at too steep of a slope. Clear the grass of any debris. Some Husqvarna mowers are equipped to use a de-thatcher accessory if that is the problem. For high grass, adjust the wheels on your lawn mower and check your owner’s manual for maximum slope limits during operation.

Undercarriage

• The Power Takeoff, or PTO, shaft is what drives your Husqvarna riding mower blade once it is engaged. For push and walk-behind mowers, the blade rotates on a crankshaft. Whatever model Husqvarna mower you have, the undercarriage should be clear of anything that can stop the rotation, such as grass and dirt clumps. Hardware on the PTO or crankshaft needs to be serviceable so that blades can rotate freely. Check for rust and lubricate as necessary.

Safety Settings

• Certain safety settings on any Husqvarna seated mowers will cause the engine to shut down if the proper conditions are not met. Engine shut down also stops blade rotation. A safety switch under the seat shuts everything down if it doesn’t sense a rider on it. If you don’t keep yourself centered on the seat while cutting on rough or bouncy terrain, the engine can hesitate or cut off. Adjust your seat as necessary prior to operation and use the seat belt if it’s an option.

Oil Levels

• Oil levels can affect your Husqvarna’s engine operations so it is important to check them prior to operation and according to the maintenance schedule. If the oil level is too low, engine parts receive no lubrication, resulting in seizure from hot parts melting onto each other. If oil is filled beyond capacity, excess oil will spill into the combustion chamber and result in an overheated engine. Overheated engines will shut down and stop your blade from engaging.