Boat Throttle Control Box 881170A15 for Mercury/Mariner Outboards, Side Mount Gen I, 8-Pin 15 ft Harness, Power Trim/Tilt, Replaces 8M0178521 & 881170A1 by FASWORX

FASWORX 881170A15 Side-Mount Remote Control (Mercury/Mariner Replacement) This FASWORX control box is a drop-in replacement for the popular Mercury / Quicksilver side-mount remote control used on many outboards with integral power trim. It duplicates the OEM layout — right-hand, pull-to-open handle with trim/tilt on the grip, built-in warning horn provision, and an 8-pin, 15 ft harness for easy connection to the engine. Mercury later superseded part 881170A15 to 8M0178521; that supersession also covers 881170A1 and 16900A15. If your old box was labeled “Commander 4000” or “MSC 4000 side mount” with an 8-pin plug and 15-ft lead, this is the style you’re looking for. Use Gen-I control cables and verify adapter needs on small four-strokes (some 2005+ 8/9.9/15/20 HP engines require an extra harness). Install, connect, and restore smooth throttle/shift and trim from the helm.

• Direct replacement for Mercury/Quicksilver 881170A15 – Side-mount remote control with handle-mounted trim switch, built to match OEM function for current Mercury/Mariner outboards and 1993+ Force using Mercury style cables.
• FASWORX unit is cross-referenced to Mercury 8M0178521, 881170A1 and 16900A15
• Gen I, 8-pin, 15 ft (4.58 m) harness – Includes the traditional 8-pin connector and 15 ft lead used on most side-mount Mercury installations; supports front-mount trim wiring.
• Power trim / pull-to-open / right-hand – Same control logic buyers expect on 881170A15 boxes sold under Commander 4000 / MSC 4000 descriptions, ideal for repower or replacement.
• FASWORX marine-grade build – Packaged for aftermarket install with the specs boat owners search for Mercury side mount control box, boat throttle control 881170A15, backed by a US-based seller.