YIYANTO Ignition Coil Kit for John Deere Lawnmowers — 2-Pc Coil + Spark Plug, Direct-Fit Replacement

The YIYANTO MIA12788 ignition coil kit pairs two high-performance coils with a compatible spark plug, restoring reliable starting and steady running for many John Deere lawn tractors and mowers.

If your mower hesitates at startup, stalls at idle, or vibrates under load, a worn ignition coil or spark plug is often the culprit. This replacement kit is engineered to match original-fit dimensions and electrical output for a long list of John Deere models, letting you quickly swap faulty components and get back to mowing without a service visit.

Which John Deere models will this kit fit?

The YIYANTO MIA12788 ignition coil set is made to be compatible with multiple John Deere lawn tractor and mower model lines. Check your engine and part numbers before purchase to confirm compatibility.

• Fits Z series: Z515E, Z525E, Z535M, Z535R and similar models
• Fits rider and LA series: LA130, LA135, LA140, LA145, LA150, LA155
• Also compatible with select 100 series and other models listed in product details
• Replaces OEM references MIA12788, LG691060, MIA12346, MIA12864 and includes spark plug replacing M78543

How does this replacement restore mower performance?

A fresh ignition coil and proper spark plug deliver the consistent high-voltage spark needed for efficient combustion. Installing these new components corrects weak firing, which reduces hard starts, rough idling, and engine vibration.

• Restores reliable spark delivery for faster starting
• Stabilizes idle speed and reduces stalling
• Minimizes engine vibration under load
• Helps engine run more evenly across operating conditions

Is installation difficult and what tools are required?

This kit is designed for straightforward, homeowner-friendly replacement with no special tools required in most cases. Basic hand tools and a short amount of mechanical familiarity are normally enough to swap the coil modules and the spark plug.

• Typical tools: socket set, screwdriver, spark-plug socket
• Installation steps: disconnect battery, remove ignition wire and old coil, fit new coil, replace spark plug, reassemble
• Mounting points and connector types match OEM layout for direct fit
• Refer to your tractor’s service manual for torque specs and safety steps

What are the quality and durability features of these parts?

YIYANTO supplies coils manufactured with materials chosen for conductivity and thermal resistance, then inspected before shipment. The design aims to tolerate prolonged use under mowing conditions while maintaining consistent spark performance.

• High-quality insulation and windings for heat resistance
• Precision terminals for reliable electrical contact
• Pre-shipment quality checks to reduce early failures
• Includes matched spark plug to optimize combustion and longevity

Who is this for: This replacement kit suits homeowners, landscapers, and small-fleet managers who operate compatible John Deere mowers and want a cost-effective way to fix ignition-related starting or running issues. It’s ideal if you prefer quick DIY repairs that return your tractor to dependable operation without sourcing multiple separate parts.