Quicksilver 2-4-C Marine Grease with PTFE, specified by Mercury Marine under part numbers 802859Q1, 802859A1, and 802859, is a lithium-based, NLGI Grade 2 grease formulated for use in marine environments where equipment is exposed to heavy loads, water intrusion, and constant operation.
It is widely used by technicians, mechanics, and crew chiefs who require consistent lubrication performance for both recreational and high-performance boats. The product is engineered to resist oxidation, protect against corrosion, and maintain lubrication integrity across extended service intervals.
Technical Properties
This grease uses a lithium soap thickener with an NLGI 2 consistency, making it suitable for both general-purpose and heavy-duty marine lubrication. The base oil viscosity is approximately 220 cSt at 40°C, allowing for stable lubrication under varying speeds and loads.
A key feature of Quicksilver 2-4-C is its inclusion of PTFE (polytetrafluoroethylene), which creates a low-friction barrier on metal surfaces. This property is especially valuable in high-load points such as propeller shafts, steering linkages, and swivel pins, where friction reduction directly contributes to component longevity.
The grease has a dropping point near 190°C, meaning it retains structure well above normal marine operating temperatures. Its operating range extends from -20°C to 120°C in continuous service, with short-term exposure tolerable up to 150°C.
Importantly, the product demonstrates excellent resistance to water washout, allowing it to remain effective after exposure to spray, immersion, and repeated launch and recovery cycles. In addition, its oxidation stability ensures the grease does not harden or degrade quickly when subjected to temperature cycling common in marine use.
Applications
Quicksilver 2-4-C Marine Grease, part numbers 802859Q1, 802859A1, and 802859, is intended for use across a wide range of marine components. It is commonly applied to steering systems, throttle and shift cables, tilt and swivel mechanisms, propeller shafts, remote controls, and hinge points.
It is also suitable for boat trailer wheel bearings, which endure both heavy loads and direct water exposure during launching. In high-performance applications such as racing or offshore boating, these parts are subjected to greater mechanical stress, and the grease provides the protection needed to ensure consistent operation.
Instructions for Use
For best performance, technicians should clean the target surfaces thoroughly, removing traces of old grease, dirt, and corrosion before applying fresh lubricant. The grease can be applied directly from the tube or dispensed with a grease gun into fittings and enclosed housings.
Coverage of all friction points is essential to establish a continuous protective film. Under normal service conditions, lubrication should be repeated every three to six months. In competitive or high-load marine environments, it is advisable to reapply before events, extended use, or long-term storage periods.
Trailer wheel bearings, in particular, should be inspected and lubricated before long-distance transport to prevent overheating and failure.
Performance Characteristics
The PTFE content of Quicksilver 2-4-C Marine Grease provides low-friction operation, reducing metal-to-metal contact and limiting wear. The lithium soap base offers strong resistance to water infiltration, ensuring the lubricant remains in place even under repeated exposure to saltwater.
Its anti-corrosion properties protect components during both operation and idle storage, and its stability across temperature fluctuations allows it to remain effective in a variety of environments. Because it can be applied across multiple systems, mechanics and crew chiefs can streamline maintenance routines without sacrificing reliability.
Standards and Approvals
This product meets common ASTM test standards for marine-grade lubricants. Under ASTM D1264, it demonstrates strong resistance to water washout. ASTM D2266 wear tests confirm its ability to limit surface wear, while ASTM D1743 results show effective corrosion prevention in the presence of moisture.
Mercury Marine specifies it under part numbers 802859Q1, 802859A1, and 802859, and it has become standard in Mercury Racing service environments as well as general marine repair and maintenance.
Contact Mike Hill at +1-714-697-1716 or email mike@buckshotracing77.com for technical support.