Sierra NEW Starter Solenoid 18-5821 Replaces: 6G1-1941-10 40-90HP 4-Stroke 0810

Sierra Starter Solenoid — Part Number 18-5821
Brand: Sierra | Condition: New Old Stock (NOS)

You are purchasing a new Sierra Starter Solenoid, part number 18-5821, for Mercury/Mariner and Yamaha 4-stroke outboard motors. This is a genuine Sierra branded part — never installed, never used.

Condition Details:

This is a New Old Stock (NOS) part. The starter solenoid 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.

Part Number / Supersede Information:

Primary Part Number: 18-5821
Replaces OEM Mercury: 89-825096T | 825096T01
Replaces OEM Yamaha: 6G1-81941-10
Cross-References: ARCO SW945 | Mallory 9-15203

Fitment:

• Fits: Mercury / Mariner 40HP, 50HP, 60HP 4-stroke outboards, 2001 and up
• Fits: Mercury / Mariner 75HP, 90HP 4-stroke outboards, 2000 and up
• Fits: Yamaha outboards using OEM 6G1-81941-10
• Please verify fitment using your motor's model and serial number before ordering

Why Choose Quality Replacement Parts?

Sierra parts are engineered to meet or exceed OEM specifications, providing reliable performance and a precise fit for your Mercury, Mariner, or Yamaha outboard. Every Sierra part is purpose-built for harsh marine environments and backed by Sierra's limited lifetime warranty covering defects in workmanship and materials.

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 motor'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