Soruda Ignition Coil Conversion Kit for Kohler 32-707-01-S / 25-707-03-S — MDI Modules & Duplex Harness

Soruda's ignition coil conversion kit replaces Kohler part numbers 32-707-01-S and 25-707-03-S, providing the MDI module components and harnesses needed to restore spark and ignition timing on compatible Kohler CH20, CH23, CH640 and CH740 engines.

This replacement assembly includes the MDI-style modules and lead harness pieces designed to match the electrical and mounting interfaces of several Kohler spec numbers. It's intended as a direct-fit option for specific Kohler models and serial ranges, supplying the parts that typically fail in aging ignition systems — two MDI modules, a duplex lead harness, a terminal, and cable ties. The kit aims to simplify repair by delivering the commonly replaced components together so mechanics and DIYers can avoid sourcing multiple small parts.

Will this kit fit my Kohler engine model?

Compatibility depends on the engine model and the exact part or spec number stamped on the original components. This kit fits selected Kohler engines commonly labeled CH20, CH23, CH640 and CH740 when those engines use the listed spec numbers.

• Fits Kohler part numbers: 32-707-01-S and 25-707-03-S.
• Also cross-references: 32-584-24-S, 32-584-25-S and similar MDI modules.
• Intended for select spec #'s within CH20/CH23/CH640/CH740 families — verify your engine’s spec plate.

What comes inside the Soruda replacement kit?

The package contains the primary components used for converting or repairing the ignition module assembly. Each piece is arranged to replace the failing elements commonly found in Kohler ignition systems.

• Two MDI modules (32-584-03-S equivalents) for dual-spark or twin ignition outputs.
• One duplex lead harness (24-176-41-S) to connect coils to the engine wiring.
• One terminal (25-452-07-S) and three cable ties (25-454-07-S) for secure routing.
• Replaces older part numbers such as 24-584-63-S and other referenced specs.

How do I install this module conversion kit?

Installation typically requires basic mechanical skills and common hand tools. Follow safety precautions: disconnect battery or ignition source, note wiring locations, and secure components to avoid chafing.

• Remove the old modules and harness, keeping track of terminal locations.
• Mount the new MDI modules in the factory positions using original fasteners.
• Plug the duplex harness into matching connectors and secure with supplied ties.
• Confirm all connections and test for spark before full reassembly.

Will this replacement improve engine starting and reliability?

Replacing degraded ignition modules and harnesses restores correct electrical timing and connection integrity, which often resolves intermittent spark and starting problems. While results depend on the broader ignition and fuel systems, fresh modules reduce failure points associated with old or corroded parts.

• Restores secure electrical connections for dependable spark delivery.
• Eliminates common failure sources like cracked modules and brittle leads.
• Helps maintain consistent ignition timing when installed correctly.

Who is this for: This Soruda conversion kit is aimed at mechanics, small-engine repair shops and experienced DIYers who maintain Kohler-powered equipment and need a compact, cross-referenced replacement for discontinued or failing OEM MDI modules. Verify your engine’s spec numbers before purchase to ensure fitment; this kit is most useful when the original parts match the listed Kohler reference numbers and the engine exhibits ignition-related symptoms.