Buckbock Ignition Coil for Kohler CV/CH Engines — 12-584-04-S OEM‑Fit Replacement for John Deere L110 LT155

Buckbock high‑performance aftermarket ignition coil engineered to replace Kohler part 12‑584‑04‑S and fit a wide range of Kohler CV/CH engines and compatible John Deere models.

If your small engine is running unevenly, hard to start, or misfiring and it uses a Kohler CV or CH series platform, this Buckbock ignition coil is designed as a durable replacement. It is manufactured to match the electrical and mounting specifications of common Kohler OEM coils so you can restore reliable spark and engine operation without buying an original Kohler unit. Always verify your engine model and the original part number before ordering to ensure compatibility.

Which engines and machines will this coil fit?

This coil is compatible with many Kohler CV and CH series engines as well as a long list of lawn and garden equipment from John Deere and other brands. It covers multiple factory part numbers and popular aftermarket references so you can use it as a direct swap for many repair scenarios.

• Fits Kohler models: CV11, CV12.5, CV13, CV14, CV15, CV430, CV460, CV490–CV493, CH11, CH11S, CH12.5, CH12.5S, CH13, CH14, CH14S, CH15, CH410, CH430, CH450.
• Replaces Kohler part numbers: 12‑584‑04‑S, 12‑584‑05‑S, 12‑584‑01‑S and related numeric variants.
• Compatible equipment: John Deere L110, LT133, LT150, LT155, LT160, LTR155, LTR166, LX173, LX255, LX266, STX30/STX38/STX46 and select Sabre/Scotts/Craftsman units.

How does this coil affect starting and running performance?

A properly functioning ignition coil provides the high voltage pulse needed for consistent spark at the plug, which helps the engine start more reliably and run smoothly across RPM ranges. This Buckbock coil is built to meet the coil specifications common to the listed Kohler engines so it minimizes weak spark and stalling caused by failed coils.

• Delivers consistent high‑voltage output for dependable combustion.
• Designed for OEM-style mounting and terminal locations for straightforward swap‑outs.
• Resists typical environmental wear found in outdoor equipment engines.

What should I check before installing this replacement coil?

Confirming fitment before installation reduces returns and downtime. Check the engine model and the original Kohler part number on your existing coil, and inspect connections and spark plug condition while you’re servicing the ignition system.

• Verify engine model and matching OEM part number (e.g., 12‑584‑04‑S or close variants).
• Inspect spark plug, lead wire, and connector condition; replace if damaged.
• Ensure mounting points and electrical terminals align with your engine’s configuration.

How difficult is replacement and what tools are needed?

Replacing the coil is generally a straightforward maintenance task for home mechanics with basic tools, though access varies by mower or tractor model. Typical install time is 20–45 minutes depending on machine layout, with basic hand tools and safety precautions required.

• Common tools: socket set, screwdrivers, pliers, and a spark plug wrench.
• Safety: disconnect battery (if fitted) and remove spark plug boot before handling.
• Follow torque and gap guidance from the engine manual when reinstalling components.

Who is this for: This Buckbock ignition coil is intended for DIYers, small equipment repair shops, and fleet maintainers who need an affordable, reliable replacement for Kohler CV/CH series coils and compatible John Deere models. It’s suitable when the original coil has failed or when troubleshooting ignition issues, provided you confirm model and part number compatibility before purchase.