OMC Evinrude Johnson Sensor Assembly

The OMC Evinrude Johnson Sensor Assembly, part number 584824 (also listed as 0584824), is an OEM ignition timing sensor designed for 25–35 HP 3-cylinder outboard motors produced between 1996 and 2001. 

🔧 Function and Role

This sensor assembly, often referred to as a trigger or timer base, plays a critical role in the engine's ignition system. It detects the rotational position of the flywheel and transmits timing signals to the power pack, ensuring precise spark delivery to the spark plugs. Accurate timing is essential for optimal engine performance, fuel efficiency, and smooth operation.

✅ Compatibility

The 584824 sensor is compatible with various Johnson and Evinrude 25–35 HP 3-cylinder models from 1996 to 2001. Specific models include: 

• 25HP: E25TKEDC (1996), E25TKLEDC (1996), E25TKLECA (1998), E25TKECA (1998), BE25KEDC (1996), BE25KLEDC (1996), BE25KECA (1998), BE25KLECA (1998

• 35HP: SE35RWLECS (1998), SJ35RWECS (1998), SE35RWECS (1998), SJ35RWLECS (1998), BE35ARSSM (2000), BE35KSSB (2000), BE35KSIE (2001), BE35ARSIB (2001)

It's important to verify compatibility with your specific engine model and serial number before purchasing.

🛠️ Installation and Maintenance

• Installation: The sensor mounts beneath the flywheel and connects to the engine's wiring harness. Proper alignment and secure connections are crucial for accurate timing signals.

• Maintenance: Regularly inspect the sensor for signs of wear, corrosion, or damage. Ensure that the wiring is intact and free from frays or breaks. If the engine exhibits misfires, rough idling, or starting issues, the sensor may require testing or replacement.