NEWHOW Outboard Ignition Coil CDM Module 827509A10 3-Pack — 4‑Pin Epoxy‑Sealed Replacement for Mercury/Force Engines

NEWHOW 3-Pack Outboard Ignition Coil CDM Module 827509A10 is a direct-fit replacement set of three epoxy-sealed 4-pin capacitor-discharge ignition modules with integral coils for compatible Mercury/Force 2-stroke engines.

If your outboard is showing multi-cylinder misfires, a dead bank, or sudden stalls above cruising RPMs, one or more CDM (capacitor-discharge module) units may have failed. This NEWHOW 3-pack targets the 4-pin CDM generation stamped 827509A10 and cross-references common OE and aftermarket numbers so you can replace all affected cylinders at once and restore consistent high-voltage spark.

How do these 827509A10 CDMs restore reliable ignition on multi-cylinder outboards?

Each CDM contains an integral high-tension coil and SCR-based discharge circuitry that produces the 35–40 kV spark needed for reliable combustion. When a module leaks charge or its SCR opens, that cylinder will misfire or go dead; replacing all modules prevents cascading failures from aged units.

• Direct aftermarket replacements for 827509A10 and related cross numbers (e.g., CDI 114-7509).
• Epoxy-sealed, 4-pin connector and one attached spark boot per module.
• Restores consistent high-voltage output across all cylinders.
• Sold as a set of three—suitable for 3-cylinder loopers or as a multi-pack for spares.

Which engines and models are compatible with this NEWHOW 3-pack?

This kit was engineered for the 4-pin CDM style used widely on Mercury/Mariner 2-stroke engines and Force/Chrysler outboards. It fits multi-CDM designs where each cylinder has its own module—common on 75/90HP 3-cylinder loopers and many 100–115HP 4-cylinder engines (buy an additional pack for a full 4-cylinder swap).

• Compatibility: Mercury/Mariner 30–300HP 2-stroke and Force/Chrysler 40–120HP models.
• Specific fits: 75/90HP 3-cyl looper and OptiMax 90–225 DFI applications listed in manufacturer cross-lists.
• Not compatible with 3-pin trigger or 6-pin EFI/SmartCraft modules—verify connector count.
• Confirm old module stamp 827509A10 and 4-pin layout before ordering.

What installation steps and precautions ensure proper operation?

These modules ground through the engine block, so clean, bare-metal mounting surfaces are essential. Remove the battery, unbolt old units, sand all three mounting pads to bare metal, and torque each new CDM to the recommended spec to secure a low-resistance ground path.

• Disconnect battery before beginning work to prevent shorts.
• Remove old CDMs (two 1/4" bolts per module) and sand mounting pads clean.
• Seat new modules, torque bolts to about 35 in-lb, and plug in 4-pin connectors.
• Label and route spark boots to correct cylinders to avoid cross-firing.

How can I confirm this 4-pin CDM is the correct replacement and not a different generation?

Check the physical features: the correct unit is an epoxy-sealed block stamped 827509A10 with a 4-pin connector and a single integrated spark boot. Early 3-pin trigger boards and later 6-pin EFI modules are different generations and will not interchange with this 4-pin CDM pack.

• Look for stamp 827509A10 and an epoxy-sealed housing with 4-pin connector.
• Do not install if your engine uses 3-pin triggers or 6-pin SmartCraft EFI modules.
• These modules are designed for 2-stroke outboards; 4-stroke EFI engines use different parts.
• Bench-test old units for stop-wire continuity as a diagnostic before replacement.

Who is this for? Boat owners, marine mechanics, and DIY technicians working on compatible Mercury/Mariner or Force/Chrysler 2-stroke outboards who need a reliable, direct-fit solution for multi-cylinder ignition failures. This 3-pack is ideal for those servicing a 3-cylinder looper or keeping spare modules on hand for larger multi-CDM engines. Confirm the 4-pin CDM generation and the 827509A10 stamp before purchase to ensure a correct match.