AM121508 Throttle Control Cable Fits for John Deere LX172 LX173 LX176 LX178 LX186 LX188 Below 160000 Control Lawn Tractors

What It Is

The AM121508 throttle control cable is an aftermarket replacement part that connects the throttle lever on the control panel to the engine carburetor or governor, allowing you to adjust engine speed (idle to full throttle). It’s designed for John Deere LX series lawn tractors with serial numbers below 160,000.

Fitment & Compatibility

• Direct fit models: LX172, LX173, LX176, LX178, LX186, LX188 (all with serial numbers below 160,000).
• Check your serial number: Look on the frame tag under the seat or on the hood. If your mower’s serial number is 160,000 or higher, this cable will not fit (different cable routing and length).
• OEM equivalent: Replaces John Deere part AM121508. Not an OEM John Deere part, but listed as a direct fit replacement.
• Measure before buying: The cable length is roughly 40 inches (end to end). Measure your old cable from the lever end to the carburetor end to confirm it matches your model.
• Deck size doesn’t matter – this cable is engine-related, not deck-specific.

Key Things to Know

• Quality is adequate for the price: At $16.99, it’s about half the cost of an OEM John Deere cable. Expect plastic ends and a basic sheath – fine for casual use but may wear faster than OEM on heavy-use machines.
• Installation is moderate: You’ll need to remove the dash panel, disconnect the old cable from the throttle lever and carburetor, route the new one, and adjust the tension. No special tools but expect 30–60 minutes.
• Common gotcha: The cable can be slightly stiff out of the box – work it back and forth a few times before installing to loosen it. Also, verify the cable end at the carburetor matches your engine’s attachment point (some LX models use a different tang style).
• Check for kinking: Route the cable with gentle curves – sharp bends will cause binding and poor throttle response.

Should You Buy It

If you have an LX series tractor below serial 160,000 and want a budget-friendly fix that works for light to medium use, this cable is a solid choice. For heavy commercial mowing or if you prefer OEM reliability, spend the extra $15–20 on the genuine John Deere part to avoid potential fitment or durability issues.