ARCO 57-5367 Outboard Starter – Mercury/Mariner 6–25 HP
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
ARCO 57-5367 Replacement Outboard Starter Motor
Keep your outboard turning over reliably with the ARCO 57-5367 starter motor — a direct-fit replacement engineered for Mercury and Mariner small-block outboards. Whether you're launching at first light or heading back out after a long day on the water, this starter delivers the consistent cranking power your engine depends on.
Compatible Applications
- Mercury / Mariner 6–15 HP (1986–1996)
- Mercury / Mariner 18–25 HP (1980–2003)
Replaces OEM & Cross-Reference Part Numbers
- Mercury / Mariner: 50-90983A1, 50-90983T1, 50-893889T, 8M0033984
- Sierra: 18-5611, 18-5639
Specifications
- Motor casing diameter: 2½"
- Drive gear: 10-tooth
Parts Desk Insights
This starter is the go-to choice for small-block Mercury and Mariner tiller and remote-steer outboards in the 6–25 HP range. It's most commonly needed on older two-stroke motors that have seen heavy use — slow or labored cranking is usually the first sign. If you're also experiencing charging issues on the same motor, pair this with a compatible ARCO outboard alternator for a complete electrical refresh. For larger Mercury outboard starters, see the ARCO 5381X for 150–225 HP or the ARCO 5415 for 80–115 HP 4-Stroke.
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.