Alternator 879147T69

Mercury Alternator 879147T69: OEM Stator Coil for Mercury, Mariner & Tohatsu Outboards

Your outboard runs fine until the moment your battery doesn’t. That’s usually when a charging stator has quietly failed, and the fix is almost always the same part: Alternator 879147T69. It’s the flywheel charging coil that keeps your house and starting batteries topped off while the engine runs, and when it goes, everything downstream of it starts acting strange.

What This Coil Actually Does

Mounted under the flywheel, this stator generates AC current as the flywheel spins past it. That current feeds your voltage regulator/rectifier, which converts it to usable DC power for your batteries. No stator output, no charge. Simple as that. Anglers running electronics all day, trolling motors, fish finders, bilge pumps, notice this failure fast because the battery drains despite hours of run time. Weekend cruisers might not catch it until the engine won’t turn over at the ramp.

Direct OEM Fit, No Guesswork

This is a genuine Mercury Alternator 879147T69, cross-referenced to Tohatsu and Nissan part number 3BJ060230 (also listed as 3BJ-06023-0). It’s engineered for Mercury, Mariner, and Tohatsu 9.9HP, 10HP, 15HP, and 20HP two-cylinder four-stroke outboards, covering both carbureted and JCI-spec models. If your engine falls in that range, this coil bolts in where the factory unit came out. No adapters. No modified wiring. Just a direct replacement built to the same spec Mercury and Tohatsu shipped from the factory.

Built for Saltwater, Not Just Freshwater Trips

Cheap aftermarket stators cut corners on winding insulation, and saltwater finds those corners fast. This one doesn’t. High-grade copper windings sit inside marine-rated protective insulation designed specifically to shrug off thermal cycling, constant engine vibration, and the corrosive reality of running in salt air day after day. That matters more than most people realize. A stator that overheats or corrodes early doesn’t just stop charging, it can short internally and take other electrical components down with it. Getting the insulation right the first time is cheaper than replacing a fried rectifier later.

Why Alternator 879147T69 Is Worth Keeping On Hand

For anyone running a fleet of small outboards, whether that’s a marina, a guide service, or just a family with two boats, having Alternator 879147T69 in the shop drawer means a dead battery doesn’t turn into a lost weekend. Compare the Mercury Alternator 879147T69 price against a tow bill or a missed charter, and stocking a spare starts looking less optional and more obvious.

Order Yours Today

A weak charging system doesn’t announce itself until you’re stranded. Don’t wait for that moment. Click Add to Cart now and get a genuine, OEM-spec Alternator 879147T69 from Marine Gear Depot on its way to you today