RANSOTO Ignition Coil Module for Kohler KT740 KT745 ZT740 – Direct Fit Replacement, OEM-Compatible

RANSOTO's ignition coil module is a direct-fit replacement designed to restore strong spark and reliable starts for Kohler KT740, KT745 and ZT740 engines.

This high-performance replacement coil is manufactured to match the original equipment footprint and electrical specifications for Kohler small engines, offering improved spark consistency and easier cold starts. It replaces Kohler part numbers 32-584-09-S, 32-584-24-S, 32-584-25-S and 3258425, so you can swap it in without modifying wiring or mounting. The module is intended for maintenance and repair of lawn, turf and light industrial equipment that use the listed Kohler engine models.

Will this coil fit my Kohler KT740 or KT745 engine?

Yes — the RANSOTO coil is engineered to be a bolt-on replacement for the Kohler models listed. It mirrors the mounting points, connector type and ignition output of the OEM units, simplifying installation and reducing downtime.

• Compatible models: Kohler KT740, KT745, ZT740
• Direct-replacement part numbers: 32-584-09-S, 32-584-24-S, 32-584-25-S, 3258425
• No wiring harness modifications required for standard installations
• Designed to match OEM electrical and mechanical dimensions

How does installation work and what tools are needed?

Installation is straightforward for anyone familiar with small-engine maintenance. The unit is plug-and-play: remove the old coil, mount the new module using the existing fasteners, and reconnect the spark lead and ground. Basic hand tools are typically all that’s required.

• Common tools: socket set, screwdriver, torque wrench for proper fastener tightness
• Estimated time: 15–30 minutes for experienced users
• Plug-and-play connector fits original harness
• Follow engine manufacturer safety and grounding procedures

What performance changes should I expect after replacement?

Replacing a worn or failing coil with this RANSOTO module improves spark strength and timing reliability, which helps smoother idling and more consistent starting. While it doesn’t alter engine tuning, a healthy ignition system supports better combustion and reduces misfires that can affect performance.

• Stronger, more consistent spark for reliable starts
• Reduced hesitation and misfires under load
• Improved cold-start behavior compared with degraded coils
• Restores original ignition characteristics without ECU changes

What warranty and quality assurances are provided?

RANSOTO stands behind the product and offers warranty support if the coil arrives damaged or is defective. Contact the seller promptly with photos of any shipping damage or functional issues to initiate assistance or replacement.

• Worry-free replacement or warranty service for damaged items
• Quality checks during production to match OEM fitment
• Customer support available for installation questions
• Keep original receipt or order details when requesting service

Who is this for: Technicians, landscapers, fleet managers and DIY owners who maintain Kohler-equipped mowers or turf equipment and need a dependable, drop-in ignition coil replacement. If your engine exhibits hard starting, frequent misfires or intermittent spark, this module offers an affordable way to restore reliable ignition performance without altering your engine’s setup.