FASWORX Boat Throttle Control Box 881170A15 Side-Mount Gen I with 8‑Pin 15 ft Harness and Trim/Tilt

FASWORX 881170A15 is a drop-in side-mount remote control that replaces Mercury/Mariner 881170A15 (and superseded 8M0178521, 881170A1) for outboards with integral power trim, featuring a right-hand pull-to-open handle and an 8-pin, 15 ft harness.

This replacement control box reproduces the familiar OEM layout and functions used on many Mercury/Mariner outboards and compatible 1993+ Force engines. It restores throttle and shift control at the helm and integrates the handle-mounted trim/tilt switch and horn provision so you don’t lose any marine-specific features when repowering or repairing. The kit is intended for Gen I cable systems and uses the traditional 8-pin connector with a 15-foot lead for straightforward wiring to engines that accept this harness style.

Does this FASWORX control box match the original Mercury layout?

Yes — the housing, handle orientation, and control logic mirror the OEM design so installation and operation feel the same as the factory unit. The pull-to-open right-hand handle and grip-mounted trim switch are reproduced to provide familiar ergonomics for skippers.

• Right-hand, pull-to-open throttle handle matching OEM placement
• Built-in trim/tilt switch on grip for integrated control
• Horn wiring provision included like the original unit

Which engines and wiring harnesses does it work with?

This box is intended for Mercury/Mariner outboards that use the Gen I cable interface and an 8-pin connector with a 15 ft lead. It cross-references Mercury part numbers 8M0178521, 881170A1 and 16900A15, but check small four-stroke models from 2005 onward — certain 8/9.9/15/20 HP engines may need an additional adapter harness.

• 8-pin, 15 ft (4.58 m) harness included for most side-mount setups
• Compatible with engines using Gen I control cables
• Verify adapter requirements on some small 2005+ four-stroke engines

How simple is it to install and get back on the water?

Installation is straightforward for boat owners familiar with side-mount remote boxes: mount the housing, route the 15 ft harness to the engine, plug in the 8-pin connector, and test shift/throttle and trim functions. No special programming is needed — it’s built to be a functional replacement that restores helm control quickly.

• Pre-wired 8-pin connector reduces cutting or splicing
• Direct replacement for common Mercury part numbers
• Typical install requires standard hand tools and cable routing

What are the build quality and warranty expectations?

FASWORX manufactures this control with marine-grade materials for aftermarket replacement use, designed to withstand the humid, corrosive conditions of boating. As an aftermarket seller based in the U.S., FASWORX provides product support for fit and function questions — check seller details for specific warranty terms.

• Marine-grade housing and components for durability
• Packaged for aftermarket replacement and repower projects
• U.S.-based seller support for fitment guidance

Who is this for: The FASWORX 881170A15 control box is aimed at boat owners, marinas, and professional installers replacing a worn or damaged Mercury/Mariner side-mount remote on outboards that accept Gen I cables and an 8-pin, 15 ft harness. It’s especially suited for those restoring original helm ergonomics after repowering or those who previously used Commander 4000 / MSC 4000 style side-mount controls. Before buying, confirm your engine’s connector type and whether your particular small four-stroke requires an extra adapter harness to ensure plug-and-play installation.