ARCO 57-30433 Gear Reduction Starter – GM Marine Inboard Engines
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You have 30 days to request a return. All sale items are final sale.
ARCO 57-30433 Gear Reduction Starter
Restore reliable cranking to your GM-powered inboard with this standard-duty, direct-fit gear reduction starter from ARCO Marine. Engineered as a true OEM replacement, the 57-30433 is designed for GM marine engines equipped with a 14" flywheel and staggered bolt pattern — delivering the torque and dependability you need to get on the water without second-guessing your ignition system.
Compatible Applications
- All GM marine inboard engines with 14" flywheel and staggered bolt pattern
- Late-model MerCruiser 3.0L (14" flywheel with tail bracket)
Key Specifications
- Type: Standard-duty gear reduction
- Flywheel: 14" with staggered bolt pattern
- Tail bracket required for late-model 3.0L applications
Parts Desk Insights
This is the go-to starter for GM inboard applications where the engine cranks slowly, clicks without turning over, or has a starter that's seized or worn out. Best suited for MerCruiser 3.0L and similar GM-block inboards. Before swapping the starter, confirm the solenoid is functioning — the ARCO Heavy-Duty Starter Solenoid (SW463) is a compatible pairing for MerCruiser applications. If you're looking for a performance upgrade over this standard-duty unit, see the ARCO High Performance Starter (57-30459). For a complete service, the ARCO Starter Mounting Bolt Kit (57-MBK450) ensures a clean, rattle-free install.
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.