Mercury – SmartCraft Sensor Conversion Kit | Gen II 75–115 HP | 889250K01

Overview

Older mechanical four-strokes run strong, but their factory sensors weren’t designed for modern SmartCraft displays. The Mercury 889250K01 SmartCraft Sensor Conversion Kit bridges that gap. It gives Gen II 1.7L engines the sensor package they need so SmartCraft gauges can read trim, temperature, and other key data the way they’re supposed to. Once installed, the helm feels more up to date, and the information on the screen finally matches what the engine is doing.

Key Features

• SmartCraft Sensor Upgrade – Prepares earlier four-strokes to communicate with SmartCraft gauges.
• Gen II Engine Coverage – Designed specifically for 2007-era 75–115 HP 1.7L Four Stroke engines.
• Updated Signal Output – Supplies the correct digital-style sensor inputs required by SmartCraft.
• Plug-In Harnessing – Uses OEM connectors for a clean, direct installation.
• Improved Gauge Accuracy – Gives SmartCraft gauges the information they need for proper readings.
• Modern Helm Integration – Allows older engines to run current SmartCraft instrument setups.

Compatibility

• 75 HP Four Stroke (1.7L Gen II)
• 90 HP Four Stroke (1.7L Gen II)
• 115 HP Four Stroke (1.7L Gen II)
• SmartCraft gauge systems

Performance & Practical Benefits

With the right sensors on board, these engines can finally send meaningful data to SmartCraft displays. Trim readings behave properly, temperature values make sense, and the gauge reacts the way newer engines do. The conversion keeps the rigging clean and avoids the guesswork that comes from mixing old senders with modern displays. It brings older four-strokes into the SmartCraft world without replacing the engine or rewiring the whole boat.

Why Buy OEM

Sensor conversions only work well when the signal matches what the display expects. Mercury’s OEM kit includes the correct sensors and wiring for these 1.7L engines, ensuring clean communication and long-term reliability. Aftermarket workarounds often drift out of spec or create data noise, but the factory kit provides the accuracy SmartCraft needs to stay stable.

FAQ

Q1: When is this conversion kit needed?
When upgrading Gen II 75–115 HP engines to SmartCraft gauges that require proper SmartCraft-compatible sensor inputs.

Q2: Does this kit change how the engine runs?
No. It only updates the sensor signals for the gauges—engine operation stays the same.

Q3: Is installation complicated?
Most installs are straightforward with basic tools. The sensors and connectors match factory locations.

Q4: Does this kit support all SmartCraft gauge types?
It supports standard SmartCraft gauges designed to read sensor-based data from these engines.

Q5: Will it work in saltwater environments?
Yes. The sensors and wiring are built for long-term marine use.