Mercury Power Trim & Tilt Assembly | OEM 99659A21 | Fits 1984–1993 Mercury & Mariner 35–200HP Outboards | 1 Year Warranty

Product Overview

Restore reliable trim and tilt performance with this genuine OEM Mercury Power Trim & Tilt Assembly, designed for 1984–1993 Mercury and Mariner 35HP–200HP outboard engines equipped with the 3-ram power trim system. This factory trim unit has been tested under load, ensuring proper operation before being offered for sale. Removed from a freshwater engine, this OEM assembly features straight hydraulic rams, undamaged wiring, and is ready for installation. It has been professionally inspected to ensure dependable performance, making it an excellent replacement for a worn or malfunctioning trim unit. Whether you're repairing your current outboard or completing a restoration, this genuine Mercury power trim assembly delivers factory fit, dependable operation, and long-lasting reliability.

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Key Features

• Genuine OEM Mercury Power Trim & Tilt Assembly
• Fits 1984–1993 Mercury & Mariner 35–200HP outboards
• Designed for 3-ram trim systems
• Tested under load for proper operation
• Straight hydraulic rams
• Freshwater donor unit
• No cut, burnt, or broken wires
• Professionally inspected
• Ready to install
• 1-year working warranty (core required)

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Technical Specifications

Specification	Details
Brand	Mercury
Product Type	Power Trim & Tilt Assembly
Condition	Used – Professionally Tested
OEM Part Number	99659A21
Casting Number	398-5454A21
System Type	3-Ram Hydraulic Trim System
Horsepower Range	35–200 HP

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OEM Part Numbers

• 99659A21 – Power Trim & Tilt Assembly
• 41493A7
• 41493A3
• 41493A4
• 41493A1

Casting Number

• 398-5454A21

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Compatible Applications

Designed for select Mercury and Mariner outboards including: Model Years

• 1984
• 1985
• 1986
• 1987
• 1988
• 1989
• 1990
• 1991
• 1992
• 1993

Horsepower

• 35 HP through 200 HP

Engine Brands

• Mercury
• Mariner

System Type

• 3-Ram Power Trim & Tilt System

Donor Engine

• 1987 Mercury 45 HP
• Serial Number: 0B178308

Important: Always verify compatibility using your engine's serial number and OEM part number before purchasing. If you need assistance confirming fitment, contact EZ Boats Marine and we'll be happy to help.

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Condition

This Mercury Power Trim & Tilt Assembly has been professionally inspected and tested. Inspection highlights include:

• Tested under load and operating correctly
• Straight hydraulic rams
• Freshwater donor unit
• No cut, burnt, or broken wires
• Ready for installation

Please review all product photos carefully to evaluate the cosmetic condition before purchasing.

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What's Included

Your purchase includes:

• OEM Mercury Power Trim & Tilt Assembly (99659A21)

Only the components shown in the product photos are included.

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Shipping Information

Your power trim assembly will be securely packaged to help prevent shipping damage during transit. We offer fast shipping throughout the United States, with international shipping available upon request. For an accurate shipping quote, please provide:

• Country
• ZIP or Postal Code
• Residential or Commercial Address
• Whether liftgate service is required

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Why Buy from EZ Boats Marine?

• Genuine OEM Mercury Marine Parts
• Professionally Tested Components
• Freshwater OEM Parts
• Factory Fit and Finish
• Honest Condition Descriptions
• Fast Nationwide & International Shipping
• Secure Packaging
• Experienced Marine Parts Specialists
• Dedicated Customer Support

EZ Boats Marine is committed to supplying quality OEM marine parts backed by expert service and dependable support.

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Frequently Asked Questions

Is this a genuine Mercury part?

Yes. This is an original OEM Mercury Power Trim & Tilt Assembly manufactured by Mercury Marine.

What condition is it in?

The assembly is in good used condition. It has been professionally inspected, tested under load, features straight hydraulic rams, and comes from a freshwater engine.

Which engines does it fit?

This assembly fits select 1984–1993 Mercury and Mariner 35HP–200HP outboards equipped with the 3-ram hydraulic power trim system. Always verify compatibility using your engine's serial number and OEM part numbers before ordering.

Is it ready to install?

Yes. The assembly has been tested, inspected, and is ready for installation.

How does the warranty work?

A 1-year working warranty is included and is validated by returning your old core. A prepaid return shipping label is provided. If you do not have a core, you can purchase the full 1-year warranty for 10% of the purchase price. Otherwise, the unit is covered by a 45-day warranty.

Can EZ Boats Marine verify fitment?

Absolutely. Simply send us your Mercury engine's model and serial number, and we'll confirm whether this OEM Power Trim & Tilt Assembly is the correct fit before you purchase.