MERCURY 75 to 125Cv Complete Trim 8M0171818

Overview

The MERCURY 75 to 125Cv Complete Trim Kit is a fully integrated hydraulic trim system, delivered ready for installation. It combines the electric motor, hydraulic pump, and trim cylinders into a single replacement unit. This solution is recommended when multiple components fail simultaneously, as it optimizes the cost-to-time ratio of the repair compared to replacing parts individually.

Technical Specifications

Mercury Mariner 75 to 115Cv Complete Trim Kit

Genuine Part - New Design

• 75, 90 3-Cylinder 2-Stroke
• 100, 115, 125 4-Cyl 2-Stroke
• 75, 90, 115, 125 DFI 1.5L 3-Cylinder Opyimax
• 75, 90 4-stroke carburetor
• 75, 80, 90, 100, 115 EFI 4-stroke

Part Numbers: 818903A1, 830250A1, 830250A3, 830250T3, 830250T5, 830250T08, 898447T01, 8M0055014, 8M0090335, 8M0171818

Verification recommended using the engine serial number

Recommended operating conditions

Turn off the power before removing any parts. Disconnect the hydraulic hoses and immediately plug the fittings to minimize fluid loss. Remove the tilt shaft and the cylinder mounting screws, then install the new assembly according to the torque specifications in the Mercury manual. Fill the hydraulic oil reservoir and bleed the system by performing about ten full trim cycles.

Technical Benefits

• Replacement of the entire engine, pump, and cylinder assembly in a single service call
• Eliminates complex diagnostics associated with the simultaneous failure of multiple components
• Original hydraulic seals ensure no leaks from the very first start-up
• Certified compatibility with the listed Mercury engines

Usage and Maintenance Guidelines

• Replacement Frequency: The complete trim assembly should be replaced in the event of multiple irreparable failures. Estimated service life of 8–15 years, depending on operating conditions.
• Best practices: Check the hydraulic oil level at the start of the season. Rinse the housing with fresh water after each use in salt water.
• Safety Precautions: Never manually force the motor cylinders when the power is off. Check the polarity of the electrical connections before turning on the power.

Frequently Asked Questions

What is the difference between a complete trim kit and a repair kit?

A complete trim kit replaces the entire hydraulic system. A repair kit contains only wear parts (seals, rods) to service the existing system. The complete trim kit is recommended if the electric motor or pump is also faulty.

Is it necessary to bleed the system after installation?

Yes, bleeding is essential. Fill the reservoir, perform about ten complete trim cycles to remove air from the system, then check the level and top off if necessary.

Is the motor’s serial number required to place an order?

It is strongly recommended. There are variations depending on the year of manufacture, particularly regarding the hydraulic and electrical connections. The serial number prevents any compatibility errors when ordering.