Symptoms
- Cord won't budge even with firm pulling
- Cord moves an inch then stops hard
- No resistance changes when trying different angles
- Mower was tipped on its side or stored tilted recently
Likely causes
- CommonHydrolocked engine from tippingTilting the mower with the carburetor side down lets oil or fuel enter the cylinder, locking the piston.
- CommonJammed recoil starter mechanismA broken spring or tangled cord inside the recoil housing can prevent any pull.
- PossibleSeized engine from rustLong-term storage with moisture can rust the cylinder walls and lock the piston.
- PossibleBlade obstructionA rock or debris jammed against the blade can prevent the engine from turning over.
What to do
- Disconnect the spark plug wire for safety before inspecting.
- Tip the mower onto its side with the air filter facing up (check the manual for correct side) and check under the deck for anything jamming the blade.
- Clear any debris, sticks, or rocks wedged against the blade.
- If the mower was recently tipped the wrong way, remove the spark plug and pull the cord to expel any oil or fuel that entered the cylinder.
- Check the recoil starter housing for a visibly broken spring or tangled cord.
- If the engine still won't turn after clearing the blade and cylinder, it may be seized internally and needs a mechanic's evaluation.
Tools and parts
- Work gloves
- Spark plug socket
Recoil starter assemblySearch: “lawn mower recoil starter replacement”
When to call a pro
If the blade area is clear and the cord still won't move, a small engine shop should check for a seized or hydrolocked engine before you risk further damage.
Safety
Use caution
Always disconnect the spark plug wire and wear gloves before reaching near the blade.