RANSOTO Ignition Coil Module Pack of 2 for Kohler KT600–KT740 — Direct Replacement, Copper Windings

If your Kohler-equipped mower or small engine is hard to start, stalls, or runs weakly, a worn ignition coil can be the culprit. These RANSOTO coil modules are built to match Kohler part cross-references (3258406, 32 584 06-S, 3258406S) and are supplied as a pack of two for convenient dual replacements or spares. Constructed with quality copper or copper-clad windings, silicon-steel cores and epoxy insulation, they aim to deliver consistent spark delivery and reliable performance under typical lawn equipment conditions.

How will installing these coils affect engine starting and running?

Replacing a failing ignition coil often eliminates intermittent starting issues and unstable idling by restoring proper high-voltage output to the spark plug. Expect crisper starts and more stable RPM when the coil is the root cause of the problem.

• Provides renewed high-voltage spark to the spark plug for improved ignition.
• Helps prevent misfires and rough idle caused by weak coil output.
• Sold in a two-piece pack so both cylinders (or a spare) can be serviced together.

Will this module fit my Kohler engine model?

These modules are specified for a range of Kohler models including KT600, KT610, KT620, KT715, KT725, KT730, KT735, KT740 and ZT710–ZT730 series engines. Confirm compatibility by matching your engine’s part number or the OEM cross-reference numbers listed on your original coil.

• Compatible with Kohler KT600–KT740 and ZT710–ZT730 model engines.
• Direct replacement for part numbers: 3258406, 32 584 06-S, 3258406S.
• Verify fit by comparing mounting holes and plug lead positions before installation.

What are the construction and durability features of this ignition coil?

The RANSOTO coil modules use copper or copper-clad aluminum windings for efficient conductivity, silicon-steel laminations in the core for improved magnetic performance, and epoxy or insulating paint wrapping to reduce winding shorts. These materials combine to improve longevity when installed and maintained properly.

• Copper/copper-clad windings for consistent electrical conductivity.
• Silicon-steel core to reduce energy losses and improve magnetic flux.
• Epoxy or insulating paint outer layer to protect windings from shorts and vibration.

When should I replace the ignition coil and what symptoms indicate failure?

Replace the coil when the engine shows starting difficulty, unpredictable idling, stalling, loss of power, or visible damage to the coil. Proactive replacement at the end of the coil’s service life can prevent field failures during critical mowing or work sessions.

• Symptoms: hard starts, failure to start, stalling, reduced acceleration, or rough running.
• Check for cracked insulation, corrosion on terminals, or burnt smells as signs of damage.
• Install both coils in a pack when two are required or keep the extra as a ready spare.

Who is this for: This RANSOTO ignition coil module pack is aimed at homeowners, lawn-care professionals, and small-engine technicians who maintain or repair Kohler KT and ZT series engines. It suits anyone needing a direct replacement for OEM part numbers 3258406 / 32-584-06-S, seeking improved starting reliability, or stocking spare parts for routine maintenance. If you’re unsure about fitment, compare the part numbers and physical mounting layout to your original coil, or consult a small-engine technician prior to installation.