Mercury NEW OEM Screw 10-816601 7/16-20x1.5 MerCruiser NOS Part (LOT OF 4) 0810

Mercury OEM Screw — Part Number 10-816601
Brand: Mercury / MerCruiser | Condition: New Old Stock (NOS)

You are purchasing a genuine Mercury OEM Screw, part number 10-816601. This 7/16"-20 x 1.500" screw is used as the Idler Bracket Screw and as a Lower Unit Gearcase Mounting Bolt on MerCruiser Alpha One sterndrive units, securing the lower gearcase to the upper driveshaft housing. Four screws are required per gearcase mounting application. This is an authentic factory original part — never installed, never used.

Condition Details: This is a New Old Stock (NOS) part. The screw itself is in new, uninstalled condition. As is common with NOS inventory, the original packaging may show signs of age, including shelf wear, dust, or minor cosmetic blemishes on the bag or box. The part is new and fully functional.

Specifications:

• Type: Screw (Idler Bracket / Gearcase Mounting Bolt)
• Thread: 7/16"-20 (0.437-20)
• Length: 1.500"
• Quantity required per gearcase mounting: 4

Related Parts:

• Nut: 11-859135 (7/16"-20, Brass/Nickel)
• Washer: 12-45176 (0.453 x 0.812 x 0.10)

Part Number / Supersede Information:

• Primary OEM Part Number: 10-816601 / 816601
• This part number may have been superseded by an updated Mercury/MerCruiser part number. We recommend verifying any current supersede numbers through your local Mercury Marine dealer or the official Mercury parts catalog prior to ordering.

Compatible Equipment (partial list — MerCruiser Alpha One sterndrive):

• MerCruiser Alpha One and Alpha One Gen II sterndrive units
• Compatible with all engine configurations including: 2.5L 120HP (4-cyl), 3.0L 140HP (4-cyl), 4.3L (V6), 5.0L 305 (V8), 5.7L 350 (V8), 5.8L (V8), 7.4L (V8)
• Verify specific model and serial number fitment before ordering

Why Choose OEM Parts? OEM parts are engineered and manufactured to exact factory tolerances, ensuring a precise fit, reliable performance, and long service life. Unlike aftermarket alternatives, OEM parts are designed specifically for your equipment — no modifications, no guesswork.

Returns: We proudly offer hassle-free returns. If you are not completely satisfied with your purchase for any reason, simply open a return request through eBay within 30 days of purchase and we will take care of you promptly.

Thank you for choosing QBS Parts Inc! We truly appreciate your business. If you have any issues whatsoever with your order, please give us the opportunity to resolve it before leaving feedback — we are committed to making every transaction a great experience.

Please verify fitment using your engine's model and serial number before purchasing. Feel free to message us with any questions — we're here to help!

QBS Parts, Inc. — Gardena, CA