TIKSCIENCE Marine Ignition Switch MP41000 for Mercury & Sierra — Integrated Choke, Heavy-Duty Replacement

The TIKSCIENCE MP41000 marine ignition switch is a direct-replacement starter and choke-control unit designed to fit most Mercury and Sierra outboard models for reliable cold-start performance and improved onboard safety.

This heavy-duty replacement ignition switch combines a keyed starter, integrated choke control and a locking function in a compact modular housing. Built from flame-retardant ABS and chrome-plated brass, it’s engineered to withstand marine environments, frequent use and the occasional spray of saltwater. The MP41000 is offered as a compatible swap for part numbers such as 87-88107, 87-88107A5, 17393 and related MP-series codes, making it a convenient service part for boat owners and marine technicians.

How does this ignition switch improve starting in cold or humid conditions?

The MP41000 includes an integrated choke control that helps adjust the air-fuel mixture during start-up, reducing crank time and helping the engine reach idle sooner. That feature is particularly useful when temperatures are low or humidity is high, conditions that commonly cause extended cranking.

• Built-in choke control adjusts air intake for faster ignition.
• Optimized for cold starts and damp environments.
• Reduces wear from prolonged starter motor engagement.

Will this switch fit my Mercury or Sierra outboard?

Compatibility covers a wide range of Mercury and Sierra models — the MP41000 is designed as a direct fit for many common factory and aftermarket installations. It replaces multiple part numbers, simplifying selection when servicing engines with legacy or OEM part codes.

• Matches many Mercury and Sierra outboard models.
• Direct replacement for 87-88107, 87-88107A5, 17393 and similar parts.
• Modular design minimizes wiring changes during swap-out.

Is the MP41000 durable enough for regular marine use?

Yes — materials and construction prioritize durability in harsh conditions. The housing uses flame-retardant ABS while internal conductive parts are brass with a chrome finish to resist corrosion and mechanical wear.

• Flame-retardant ABS resists heat and impact.
• Chrome-plated brass contacts offer corrosion resistance.
• Engineered for frequent use and long service life.

How simple is installation and maintenance?

The MP41000’s modular design keeps installation straightforward: match wiring and mounting points to the original assembly and fasten in place. Minimal upkeep is required beyond standard inspection for secure connections and corrosion control.

• Plug-and-play wiring for many compatible models.
• Mounts using the same footprint as original units in most cases.
• Low maintenance — inspect contacts and seals periodically.

Who this is for: The TIKSCIENCE MP41000 is aimed at boat owners, marina mechanics and marine service shops needing a dependable replacement ignition switch that restores reliable starting and improves safety. It suits operators of older Mercury or Sierra outboards seeking a robust aftermarket part matched to common OEM numbers, as well as anyone who wants an easy-install unit built to resist the rigors of saltwater and frequent use.