My Account
Shopping Cart

Quicksilver 8M0128390 75W-140 Motorcycle Transmission Oil 1 Quart

Manufacturer

Quicksilver

<h3>Quicksilver: The Marine Enthusiast&apos;s Trusted OEM Brand</h3><p>For boaters who refuse to compromise on quality, <strong>Quicksilver</strong> has been the benchmark for marine parts, accessories, and engine care products since 1950. Based in Fond du Lac, Wisconsin, Quicksilver operates as the parts and accessories brand of Mercury Marine — and that heritage is central to everything it makes. As the only marine aftermarket brand manufactured and recommended by an original-equipment manufacturer, Quicksilver brings factory-level engineering directly to boat owners, professional technicians, and weekend warriors alike.</p><p>What sets Quicksilver apart from generic aftermarket suppliers is its direct lineage to the engineers who designed the engines in the first place. Every component is engineered, tested, and manufactured with the same exacting standards as the original equipment it replaces. The result is a product line that fits right the first time and delivers the reliability boaters depend on — whether they&apos;re navigating calm inland lakes or pushing through demanding saltwater conditions.</p><p>Quicksilver&apos;s catalog spans more than 40,000 parts across 12 product lines, covering outboard and sterndrive engines from Mercury, Mariner, Yamaha, Honda, Evinrude, Johnson, Suzuki, and more. Among the most critical components in that lineup are Quicksilver Fuel Pumps, which are built to deliver factory fit and consistent fuel delivery across a wide range of outboard applications. Reliable fuel delivery is the foundation of engine performance, and Quicksilver&apos;s fuel system components are engineered to handle the demanding conditions of marine use — including compatibility with current fuel formulations.</p><p>Beyond fuel systems, Quicksilver is a go-to source for Propeller Parts &amp; Accessories that help boaters maintain and optimize their propulsion systems. From hub kits that protect both prop and gearcase to installation hardware and prop tools, these components are designed to the same tolerances as the drives they support. Proper propeller maintenance is one of the most impactful things a boat owner can do for performance, efficiency, and engine longevity — and Quicksilver makes that job straightforward.</p><p>The brand&apos;s commitment extends across lubricants, impellers, thermostats, anodes, fuel filters, oil filters, maintenance kits, and complete service packages — all engineered for the marine environment and tested to meet or exceed the standards of major engine manufacturers. Whether you&apos;re performing routine seasonal maintenance or tackling a more involved repair, Quicksilver provides the parts that restore your engine to peak operating condition.</p><ul style="list-style:disc"><li>OEM-backed engineering from Mercury Marine</li><li>Compatible with Mercury, Yamaha, Honda, Evinrude, Johnson, Suzuki, and Mariner engines</li><li>Over 40,000 parts spanning 12 product lines</li><li>Formulated and tested for freshwater and saltwater environments</li><li>Trusted by DIY boaters and professional marine technicians since 1950</li></ul><p>When reliability on the water is non-negotiable, Quicksilver delivers the peace of mind that only a true OEM-backed brand can provide.</p>

Part Number

8M0128390
09/12/2036 4:33 AM
Sale Price

$17.52

In Stock (10+)

delivery box

Usually delivered within 2 days

Authorize Seller Badge
No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

Quicksilver 8M0128390 is a premium 75W-140 synthetic transmission oil specifically formulated for large displacement V-twin motorcycle applications. This high-performance gear oil is designed for use in motorcycles with separate gear cases, including both air-cooled and liquid-cooled engines.

Key Features:

  • SAE 75W-140 viscosity grade for optimal protection across temperature ranges
  • Engineered for large displacement V-twin motorcycles with separate transmissions
  • Compatible with both air-cooled and liquid-cooled engine applications
  • Advanced formula provides superior gear protection and smooth shifting
  • 1 quart (946 ml) bottle size for convenient service
  • Genuine Mercury Marine Quicksilver quality and performance

Important Application Note: This transmission oil is not designed for wet clutch applications. It is specifically formulated for motorcycles that utilize separate gear cases where the transmission oil does not contact the clutch assembly. Always verify your motorcycle's lubrication system configuration before use.

Quicksilver marine-grade lubricants bring decades of engineering expertise to powersports applications, delivering reliable protection and performance for your V-twin motorcycle's transmission.

Products specifications

For

Motorcycle

Grade

75W-140

Size

1 quart

Type

Transmission oil

Quick and easy check out. Had exactly what I needed for my 67 Chevelle

One part I was looking at contained &quot;rebuild-part&quot; in the URL but there was nothing on the page about new or rebuilt so I&#039;m not buying that part.

Easy to find what I was looking for and it was the lowest price compared to all competitors plus free shipping

Easy, Fast

Good price fast check out

Quick and easy good price

It's all good

Share icon
Return Policy
Returns are easy at Boatplicity

Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy