ARCO 6218 Mercury / MerCruiser Tilt & Trim Motor – 12V Oildyne (Motor Only)
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You have 30 days to request a return. All sale items are final sale.
The ARCO 6218 is a 12-volt replacement tilt and trim motor for compatible MerCruiser sterndrive and Mercury outboard applications equipped with an Oildyne hydraulic trim pump. This is a motor-only replacement — not a complete pump, reservoir, or bracket assembly — making it the right repair option when the existing hydraulic components are still serviceable and only the electric motor has failed. Ring-terminal wire ends match the original electrical connection on compatible Oildyne-equipped applications.
Key Features
- 12-volt replacement tilt and trim motor — motor only, not a complete pump assembly
- Designed for Oildyne-style hydraulic trim pumps on MerCruiser I/O and Mercury outboard applications
- Ring-terminal wire ends for direct connection to original wiring
- Replaces multiple Mercury / MerCruiser OEM trim motor part numbers
- ARCO Part Number: 6218 | SKU: 57-6218
Replaces / Cross-References
- Mercury / MerCruiser 17649
- Mercury / MerCruiser 17649A1
- Mercury / MerCruiser 17649A02
- Mercury / MerCruiser 17649T
- Mercury / MerCruiser 87828
- Mercury / MerCruiser 891736T
- Sierra 18-6772
Compatible Applications
- MerCruiser sterndrive (I/O) applications with Oildyne hydraulic trim pump and 12-volt motor
- Mercury outboards with Oildyne trim pump and 12-volt ring-terminal motor configuration
- Verify using the engine or drive serial number, Oildyne pump style, 12-volt system, ring-terminal connection, and original motor part number before ordering — similar-looking trim motors may not interchange
Parts Desk Insights
Best Use Case: The 6218 is the right repair choice when electrical testing confirms the trim motor has failed but the Oildyne hydraulic pump, reservoir, and valve body are still in serviceable condition — replacing the motor only is more cost-effective than swapping the complete assembly. Common failure indicators include intermittent trim operation, excessive corrosion on the motor, damaged electrical leads, or a motor that no longer runs reliably under load. The critical fitment check is the Oildyne pump with 12-volt ring-terminal motor configuration — match the original Mercury/MerCruiser part number before ordering. If the complete pump assembly needs replacement, see the ARCO 6285 MerCruiser Tilt/Trim Motor & Pump Assembly. If the bracket assembly also needs replacement, see the ARCO 6286 MerCruiser Power Trim Pump Bracket Assembly.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.