NEWHOW Ignition Coil 583740 for Johnson Evinrude 2-225HP

NEWHOW Ignition Coil 583740 is a direct-fit dual-output replacement designed to restore spark and reliable ignition in compatible Johnson and Evinrude 2-stroke outboards from 1987–2006.

If your 2-stroke Johnson or Evinrude outboard is showing signs of weak spark or erratic running, the ignition coil is often the cause. This NEWHOW coil replaces OEM part 583740 (also listed as 0583740) and provides the same mounting pattern and electrical outputs as the factory unit, making it a straightforward swap for owners and mechanics who need a dependable, marine-rated coil built to resist corrosion and vibration.

How will this coil affect my boat’s starting and running?

Replacing a failing coil with the correct 583740 unit typically restores consistent spark timing and intensity, which improves starting reliability and smooths out idle and acceleration. It’s a common repair for symptoms that point to ignition weakness rather than fuel or carburetion problems.

• Resolves hard starts, intermittent stalls, and rough idle when coil is the source
• Restores even power delivery across RPM range for smoother acceleration
• Reduces backfiring and misfires caused by weak or inconsistent spark

Which models and horsepower ranges does this NEWHOW coil fit?

This coil covers a wide span of Johnson and Evinrude two-stroke outboards manufactured between 1987 and 2006, including small single-cylinder engines up to large V6 loopers. Confirm fit by checking your current coil’s part number and dual-plug wiring configuration.

• Small engines: 2–15 HP models (1987–2006)
• Mid-range: 28–50 HP models (1989–2006)
• V4 loopers: 75–115 HP models (1995–2006)
• V6 loopers: 135–225 HP models (1991–2006)

Is installation difficult, and what should I check before buying?

Installation is a direct bolt-on swap for matching coils and requires basic hand tools. Always disconnect the battery before touching ignition hardware and verify your old coil is a dual-output (two spark plug wires) 583740/0583740 unit to avoid ordering the wrong part.

• Disconnect battery and follow engine service manual torque specs
• Confirm part number on old coil and dual-plug output configuration
• One coil unit per cylinder bank — multi-cylinder engines may need multiple coils

What materials and protections does this coil include for marine use?

NEWHOW builds this ignition coil with a sealed, corrosion-resistant housing and internal components chosen to tolerate salt, spray, and engine vibration. The coil is engineered to meet or exceed original specification for spark output and longevity in marine environments.

• Sealed housing to minimize moisture ingress and corrosion
• Vibration-tolerant construction suitable for outboard mounting locations
• Backed by a 1-year warranty for manufacturing defects

Who is this for: Boat owners, DIY mechanics, and marine service shops that operate or repair Johnson and Evinrude two-stroke outboards from 1987–2006 and need a reliable OEM-style replacement for part number 583740/0583740. Choose this NEWHOW coil when your engine shows ignition-related symptoms and you’ve confirmed a dual-plug coil is required — it’s intended for repairs where restoring original spark performance and weather resistance matters most.