Seachoice 11651 Johnson/Evinrude 3-Position Ignition Switch

The Seachoice 11651 (model number 11651) is the heavy-duty 3-position ignition starter switch designed as a direct replacement for the OEM ignition switches found on most Johnson and Evinrude outboard engines from the 1980s through current production. Off / On / Start positions, push-to-choke function integrated into the key, 6 terminal connections on the back for the standard Johnson/Evinrude wiring harness, and the waterproof Delrin body that survives years of marine helm exposure. Replace your worn-out original and your boat starts again like it did when it was new.

What this switch does and why it eventually fails. The ignition switch is the single most operated electrical control on any boat. Every time you start the engine, every time you shut it down, every time you turn the key to access electrical accessories without starting the engine, the switch contacts close and open. Combined with the marine environment (salt air, humidity, occasional spray when a wave breaks over the bow), the contacts gradually corrode and the mechanism wears. Eventually the switch develops symptoms: intermittent starting, the engine cuts out when you bump the key, the choke doesn't engage when you push the key in for cold start, the key spins freely without engaging the start position. Once those symptoms appear, replacement is the only fix. The contacts are sealed inside the switch body and aren't serviceable.

The 3-position design is the standard for Johnson/Evinrude outboards. Position 1 (Off): all circuits open, engine and accessories off. Position 2 (On): engine ignition energized, accessory circuits energized for radio, fishfinder, lights, and other dash-mounted accessories. Position 3 (Start): momentary position that engages the starter motor, with spring-return back to On when you release the key. The push-to-choke function is the additional motion: with the key in the On position, push the key inward against the spring to engage the choke circuit for cold-engine starting. Release the key and it returns to On, releasing the choke. Standard Johnson/Evinrude OEM behavior.

6 terminal connections on the back of the switch correspond to the Johnson/Evinrude standard wiring harness: B (battery in), I (ignition out to coil/key-on circuits), S (starter solenoid), C (choke circuit), A (accessory output), and M (magneto kill / dynamo). Match your existing wires to the corresponding terminals on the new switch and the install is a direct swap. If your original switch has labels rubbed off or you're not sure which wire goes where, consult your engine's wiring diagram or have a marine electrician do the install. Mis-wiring an ignition switch can cause anything from no-start to a fire, so do it right.

The Delrin switch body is the right material choice for marine helm use. Delrin (acetal) is a thermoplastic that's dimensionally stable across temperature swings, resistant to UV exposure that yellows and embrittles cheaper plastics, and unaffected by the lubricants and cleaners commonly found around the helm. The body won't crack or distort over years of sun and weather exposure. The internal mechanism is sealed inside the Delrin body for waterproof operation in marine helm conditions.

The switch fits panels up to 1/4-inch thickness, which covers virtually every typical helm dash on production fiberglass and aluminum boats. The mounting threads on the switch barrel match the standard Johnson/Evinrude factory ignition switch dimensions, so the switch drops directly into the existing dash hole without modification. No drilling, no enlarging the hole, no fabricating a mounting plate, just unscrew the original retaining nut from behind the dash, pull the old switch out, slide the new one in, tighten the retaining nut, and reconnect the wiring.

Waterproof construction matters because the helm dash is exposed to spray, rain, washdown water, and the general moisture that's part of any open boat. The sealed switch body keeps water out of the contacts so they don't short or corrode from internal moisture. Cheap non-marine ignition switches (the kind found on lawn tractors and golf carts) fail within a season of marine use because they aren't sealed. The 11651 is built specifically for the marine environment.

Compatibility. Designed primarily for Johnson and Evinrude outboard engines from approximately the 1980s through current production. The Johnson/Evinrude standard 3-position with push-to-choke ignition switch design has been consistent across most of those years, so the 11651 fits a wide range of model years. For OMC stern drives and certain other applications using the Johnson/Evinrude switch standard, the 11651 also works. For Mercury, Yamaha, Suzuki, and Honda outboards (which use different switch designs and wiring), look at the Seachoice equivalent for those engine brands or order the OEM replacement.

The switch comes with the keys (typically two keys per switch, occasionally three depending on the production batch). The keys are the standard Johnson/Evinrude key blank that most marine locksmiths can duplicate if you need additional copies. Keep one key on your primary key ring and store the spare in a sealed bag in your tool kit so you have a backup if the primary is lost overboard.

Installation. Disconnect the boat's main battery before working on any electrical component. Pull the existing ignition switch from behind the dash by removing the retaining nut. Note which wire is connected to which terminal on the old switch (take a photo before disconnecting if you're not sure you'll remember the layout). Disconnect the wires from the old switch. Connect the same wires to the corresponding terminals on the new 11651. Insert the new switch through the dash hole from the front. Thread the retaining nut on from behind and tighten. Reconnect the battery and test all switch positions before going on the water.

What this switch isn't. It is not a Mercury, Yamaha, Suzuki, or Honda ignition switch (those use different switch designs). It is not a kill-switch lanyard cord (the dead-man safety lanyard system, which most modern outboards also have, is a separate device). It is not a high-end marine ignition switch with key fob or electronic theft-deterrent features (those are aftermarket upgrades that cost much more, the 11651 is a reliable direct OEM replacement).

Same-day shipping before 3 PM ET on in-stock units. Limited Seachoice warranty.