Quicksilver Starter/Power-Trim Solenoid 8M0185622 - OEM-Fit Stepped-Mount Replacement

Quicksilver 8M0185622 is a stepped-mount solenoid designed to operate as either the starter relay or the power-trim actuator for many Mercury and Mariner outboards and MerCruiser sterndrives.

This replacement solenoid is built to match Mercury Marine OEM form and fit, offering a direct swap-in option for specific models that use the stepped mounting plate design. It performs the electrical switching needed to engage the starter motor or to activate the power-trim circuit, and is commonly used when the original unit shows signs of wear, corrosion, or intermittent operation. Always confirm compatibility with your boat’s model and year by consulting the owner's or service manual before purchasing.

Which engines and drives is this solenoid compatible with?

The 8M0185622 fits a range of Mercury and Mariner outboards and MerCruiser sterndrives that use a stepped mounting plate solenoid. Compatibility varies by model year and installation type, so cross-reference part numbers and mounting patterns for an exact match. The part is produced to OEM standards to ensure alignment with factory electrical and mechanical connections.

• Designed for Mercury and Mariner outboards using stepped mounting plate solenoids
• Fits select MerCruiser sterndrives with the same mounting arrangement
• Produced to meet Mercury Marine OEM specifications for form, fit, and function
• Verify with your owner's/service manual or dealer for model-specific fitment

How do I tell when the solenoid needs replacement?

Common signs a starter or trim solenoid is failing include intermittent starter engagement, no response from the power-trim circuit, or visible corrosion and pitting on terminals. Electrical resistance and continuity tests can confirm an open or stuck contact. Replacing a degraded solenoid restores reliable electrical switching and prevents damage to starter motors or trim systems caused by arcing or poor connections.

• No starter crank or erratic starter engagement under turn-key operation
• Power trim not moving, moving slowly, or stopping mid-cycle
• Burned, corroded, or pitted terminals and visible plating damage
• Electrical testing shows inconsistent contact or high resistance

What should I know about installation and maintenance?

Installation typically requires matching the stepped mounting plate pattern and securely fastening the solenoid to the engine or drive, plus reconnecting battery and control wiring. Disconnect the battery before removal to avoid short circuits. After installation, inspect connections for tightness and apply dielectric grease to terminals in marine environments to reduce corrosion.

• Always disconnect the battery before starting work
• Match mounting plate hole pattern and terminal layout to original part
• Tighten battery and control fasteners to recommended torque values
• Use dielectric grease or corrosion protectant on exposed terminals

Will this solenoid affect performance or warranty?

Using a replacement built to OEM specifications helps maintain factory-level electrical performance for the starter and trim circuits. Quicksilver parts are manufactured to meet Mercury Marine tolerances, which supports reliable operation and better compatibility than generic substitutes. For warranty matters, consult Mercury/Mariner warranty documentation or your dealer to understand coverage when aftermarket parts are installed.

• Manufactured to OEM tolerances for consistent electrical switching
• Helps preserve starter and trim system reliability when properly installed
• Check dealer or manufacturer policy regarding part installation and warranty
• Recommend retaining original part for reference during replacement

Who is this for: The Quicksilver 8M0185622 is intended for boat owners, marine technicians, and service shops seeking a direct-fit starter or power-trim solenoid for Mercury, Mariner, and MerCruiser systems that use a stepped mounting plate. It suits anyone replacing a worn or failing solenoid who wants an OEM-spec part to restore dependable starting and trim operation. Always verify fitment with your vessel’s documentation or a qualified technician before ordering.