
Reasons Your Hydrostatic Mower Won’t Move or Go Forward
- Drive Release Handle Not in Operating Position. ...
- Missing Key in Axle. ...
- Drive or Pump Belt is Worn, Loose or Broke. ...
- Bad Tensioner Pulley. ...
- Missing Idler Arm Spring. ...
- Low Hydraulic Fluid Level. ...
- Hot Hydraulic Fluid. ...
- Air in the Hydraulic System. ...
- Non-Hydraulic Related Items that Can Keep Your Mower from Moving Forward. ...
Full Answer
Why won’t my riding mower move?
When it’s time to spruce up your lawn, you hop on your riding mower only to find that it won’t move. What could be the problem? More importantly, can it be fixed? A riding mower will not move forward or backward if there are issues with the drive belt, terrain, gears, hydraulic fluid, pressure switch, or key stock.
Why does my lawn mower spin when I turn it on?
Air in the system can prevent your mower from moving. Air can be removed from the system in most lawn mowers by raising the rear drive tires off of the ground and allow them to spin forward and backward until you don’t hear excessive noise while the wheels move at a normal speeds.
Why is my lawn mower stuck in mud?
A lawn mower stuck in mud is due to a lack of friction. The wheels are not able to create enough friction with the wet surface to move the mower forward or backward. In order to get the mower in motion again, other forms of material will be needed under the drive wheels.
What causes a hydrostatic lawn mower to stop working?
Old Hydraulic Fluid A hydrostatic lawnmower uses hydraulic fluid to drive the transmission. When this fluid sits for a long time (i.e., over winter), it can lose many of its properties, meaning that it can cause transmission failure. In most cases, when one of these lawnmowers isn’t moving, the problem is likely old fluid.

Why won't my lawn mower move forward or backwards?
A blocked fuel filter can keep gasoline from flowing to your mower's engine in adequate supply, resulting in a lawn mower that isn't drivable. Damaged or clogged air filters also can prevent your lawn mower from going forward or in reverse simply because the engine will overheat quickly.
Why will my mower start but not move?
If your riding lawn mower won't move, the problem could be a broken ground drive belt. If the riding mower is slow and sluggish, the ground drive belt could be so worn that it slips. Either way, follow the steps in this repair guide and video to replace the ground drive belt on your lawn tractor.
What causes a lawnmower to lock up?
Your lawn mower's piston can seize if the mower stands for a long time in wet conditions or if you forget to put oil in the crankcase. You may be able to free the piston by removing the spark plug and manually rocking the blade.
Why is my lawn mower not self propelling?
0:102:12Top Reasons Lawn Mower Not Self-Propelling - YouTubeYouTubeStart of suggested clipEnd of suggested clipA broken or mystic control cable will prevent the mower from self propelling as well if the cable isMoreA broken or mystic control cable will prevent the mower from self propelling as well if the cable is intact. But doesn't move freely. You can try adding a small amount of lubrication.
How do I know if my lawnmower transmission is bad?
To check the transmission, carefully watch the transmission when the engine is running. If the pulley is spinning, and the wheels aren't turning, the transmission is bad. Unfortunately, if this is broken, it may be time to buy a new mower because this part is generally unreplaceable.
Why is my hydrostatic mower not moving?
A hydrostatic lawn mower may not move because of a bad drive belt; bad tensioner pulley; broke tensioner spring; old or low hydraulic fluid; hot hydraulic fluid; air in the hydraulic system; or the drive release handles are in the “released” position.
How do you know if your lawnmower is seized?
How to tell if a riding lawnmower engine is seized:It sounds rough.Hard to start the engine.The blades are stuck.The piston and cylinders won't move.The oil will be deficient.The fuel quality will have deteriorated.
How do you fix a seized lawn mower?
1:076:15Seized Lawn Mower Engine Fix (PB Blaster) - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd found a trick that I'm trying. And we'll see how it goes so as you can see first I tipped theMoreAnd found a trick that I'm trying. And we'll see how it goes so as you can see first I tipped the lawnmower up on end so that the spark plug is pointing towards the ceiling.
How do you unlock a lawnmower?
0:102:38Lawn Mower Won't Start: Can't Pull the Recoil Starter Rope - YouTubeYouTubeStart of suggested clipEnd of suggested clipPull the starter rope to see if the recoil starter works if the recoil starter is locked up orMorePull the starter rope to see if the recoil starter works if the recoil starter is locked up or cracked replace it the recoil starter is easy to replace on this lawnmower.
How do you fix a self-propelled yard machine?
The traction control cable might be broken or misadjusted. Check the traction control cable to determine if it moves freely. If the control cable does not move freely, try squirting a small amount of oil into the end of the cable to lubricate it. If lubricating the traction control cable is not effective, replace it.
Can you fix self-propelled lawn mower?
If the transmission pulley is spinning, but the lawn mower wheels don't turn, this indicates that the transmission is defective. The transmission is not repairable—if the transmission is defective, you must replace it. The transmission is powered by the drive belt, and the drive belt connects to the engine crankshaft.
Why is my self-propelled mower so hard to push?
The most likely reason a mower is hard to push is that the drive cable needs adjustment. Other possible causes include: Worn drive belt. Damaged pulley.