881170A20 8M0178524 Mercury Control Box | Genuine Used Part

🔧 Product Description

Genuine Mercury Side-Mount Remote Control Box - Part Number: 8M0178524

A genuine Mercury and Quicksilver mechanical side-mount remote control for single-engine outboards with power trim.

The control combines throttle, forward-neutral-reverse gear selection, fast-idle operation, power trim control and the engine warning horn in one helm-mounted assembly. It is fitted with an 8-pin electrical connector and a 20-foot control harness.

⚙️ Key Features

• Genuine Mercury / Quicksilver remote control
• Correct current part number 8M0178524
• Supersedes original control 881170A20
• Handle-mounted power trim switch
• Built-in warning horn and 20-foot wiring harness

🚤 Compatibility

Commonly used on

• Mercury and Mariner outboards with mechanical throttle and shift controls
• Force outboards using Mercury-style control cables and wiring

Typically suits

• Engine models:
• Mercury / Mariner outboards with integral power trim and an 8-pin control connection
• Mercury two-stroke carburetted outboards
• Mercury EFI two-stroke outboards
• Mercury OptiMax outboards with mechanical controls
• Mercury carburetted and EFI four-stroke outboards with mechanical controls
• Force 40HP and larger outboards from 1993 onward using Mercury-style cables
• Model-year 2005 and newer Mercury 8HP / 9.9HP and 15HP / 20HP four-strokes when used with the applicable adapter harness
• HP Range: 8HP - 300HP, dependent on mechanical-control configuration
• Engine Type: Mercury / Mariner two-stroke and four-stroke outboard; Force outboard
• Year Range: Approximately 1993 onward, dependent on wiring and control-cable configuration

🔌 Function

The control box transfers helm-lever movement to the engine throttle and gearshift mechanisms while providing electrical connections for trim operation, engine starting circuits and warning-horn functions.

⚠️ Common Signs of Failure

• Control lever is stiff, loose or difficult to move
• Engine does not fully engage forward or reverse
• Excessive free play before the throttle opens
• Trim switch or warning horn does not operate
• Internal detent, friction or neutral-safety components are worn

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 8M0178524 → Supersedes 881170A20
• 881170A20 earlier OEM 20-foot side-mount control
• 881170A2 earlier formatted OEM reference

OEM / Related Numbers

• 8M0178524
• 881170A20
• 881170A2
• 16900A20
• 881170A15
• 16900A15
• 8M0178521 15-foot harness version

Aftermarket / Verified Equivalents

• Recmar: REC881170A20
• Pro Marine: 881170A15P
• FridayParts: K110096000
• POWEROB TEC: 881170A20 replacement control

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated