Mercury MerCruiser Quicksilver Gear-Housing Screw 7/16-20 x 1-1/2 Inch 816601
In stock items ship same or next day.
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You have 30 days to request a return. All sale items are final sale.
Product Description
Mercury MerCruiser Quicksilver 10-816601 is the 7/16-20 x 1-1/2-inch screw used to attach the lower gear housing to the driveshaft housing on specified MerCruiser Alpha One Gen II drives. Mercury catalogs its dimensions as .437-20 x 1.500.
Key Features
- OEM screw, full catalog reference 10-816601.
- Nominal thread: 7/16-20.
- Specified length: 1-1/2 inches.
- GTIN: 745061318991.
Product Compatibility
Verified drive applications include Alpha One Gen II 1991–1995, serials 0D469859–0F679999. The number also appears in later Alpha One Gen II drive and specified MerCruiser engine-bracket diagrams. Match the exact assembly and fastener position.
Replacement and Installation
Inspect the screw threads and associated washer and threaded connection before reassembly. Use the specified thread preparation and tightening procedure for the actual assembly. Do not substitute a similar-length metric or coarse-thread fastener.
Parts Desk Insight
The .437 specification is Mercury’s nominal 7/16-inch thread designation. The parts catalog’s thread and length identify the fastener; package dimensions do not.
Manufacturer Parts Lookup
Use Mercury’s official parts finder to check the part against your engine or drive serial number.
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.