Mercury – Pitot/Speed Sensor Kit | 100 PSI SmartCraft Speed Input | 881879A15

Overview

For boats running under 80 mph, a pitot-style sensor is a simple and reliable way to feed speed data into SmartCraft. The Mercury 881879A15 Pitot/Speed Sensor Kit delivers a 100 PSI pressure signal and includes the key harness needed for systems using the round 3-pin to flat 4-pin connection. It mounts easily on a MerCruiser sterndrive transom bracket or directly on the hull near the engine, giving SmartCraft instruments a clean, steady speed reading without relying on GPS or paddle wheels.

Key Features

• 100 PSI Pitot Sensor – Designed for accurate water-pressure speed readings below 80 mph.
• Includes 84-863737 Harness – Round 3-pin to flat 4-pin adapter harness included for SmartCraft integration.
• Flexible Mounting Locations – Installs on a MerCruiser sterndrive transom bracket or on the hull near the engine.
• Complete Installation Hardware – All parts needed for mounting and connecting the sensor are in the kit.
• SmartCraft Compatible – Works with any SmartCraft-capable MerCruiser or Mercury Racing engine.
• OEM Sensor Reliability – Built for consistent readings and long-term exposure to marine conditions.

Compatibility

• SmartCraft-compatible MerCruiser engines
• SmartCraft-compatible Mercury Racing engines
• Setups requiring only the 84-863737 (round 3-pin to flat 4-pin) harness
• MerCruiser transom bracket or hull-mounted installations

Performance & Practical Benefits

This kit gives you a straightforward way to generate a clean pressure-based speed signal for SmartCraft displays. The 100 PSI sensor reacts quickly and provides steady readings across the full usable speed range. With the included 84-863737 harness, the installation stays simple—no extra adapters or guesswork. Once mounted, SmartCraft gauges update quickly and reliably, giving you confidence in your speed data.

Why Buy OEM

Pitot sensors constantly face pressure spikes, vibration, and water exposure. Mercury’s OEM kit is designed to handle that stress while keeping data accurate. The included harness matches SmartCraft’s pinout and shielding requirements, avoiding the noise, drift, and intermittent behavior common with aftermarket components. It’s a plug-and-play solution that holds up season after season.

FAQ

Q1: What makes this kit different from other 100 PSI pitot kits?
It includes only the 84-863737 round 3-pin to flat 4-pin harness—ideal for systems that don’t need the 10-pin harness.

Q2: Will this work instead of a paddle wheel or GPS?
Yes. It provides its own pressure-based SmartCraft speed signal.

Q3: Where should the sensor be mounted?
On the MerCruiser sterndrive transom bracket or on the hull near the engine for best water flow.

Q4: Does it work with all SmartCraft engines?
Yes—any SmartCraft-capable MerCruiser or Mercury Racing model.

Q5: Is the kit complete?
Yes. Sensor, mounting hardware, and the required 84-863737 harness are all included.