MERCURY 92-858021K01
MERCURY Genuine Premium 2-Cycle Oil Instruction Manual
Model: 92-858021K01
1. Introduction
This manual provides essential information for the proper use and handling of MERCURY Genuine Premium 2-Cycle Oil. This product is a factory original equipment part, designed to meet the specific requirements of 2-stroke engines. Adhering to these instructions will ensure optimal performance and longevity of your engine.

Figure 1.1: Front view of the MERCURY Genuine Premium 2-Cycle Oil bottle, showing the brand logo, product name, and "Multi-Use" designation.
2. Product Overview and Features
MERCURY Genuine Premium 2-Cycle Oil is formulated for superior protection and performance in various 2-stroke applications. Key features include:
- One (1) quart / 32 fluid ounces of premium 2-cycle outboard oil.
- Formulated to reduce corrosion of internal engine components.
- Helps maintain peak engine performance and fuel economy.
- Contains ashless dispersants for cleaner engine operation.
- Multi-use compatibility for various 2-stroke engines, including chainsaws, snowmobiles, lawn mowers, and motorcycles.

Figure 2.1: Angled view of the oil bottle, highlighting its design and labeling.
3. Usage and Application
This oil is suitable for use in TC-W2 and TC-W3 oils in pre-mix or oil-injected 2-stroke applications. Always refer to your engine's owner's manual for specific oil requirements and mixing ratios.
3.1. Fuel Mixing Chart (Refer to product label for exact details)
The product label includes a fuel mixing chart. Below is an example of typical ratios. Always consult your engine's manual for precise recommendations.

Figure 3.1: Back view of the oil bottle, displaying the fuel mixing chart and additional product information.
| Ratio | Oil (Oz) | Oil (mL) | Fuel (Gal) | Fuel (L) |
|---|---|---|---|---|
| 25:1 | 5 oz | 150 mL | 1 gal | 3.79 L |
| 50:1 | 2.5 oz | 75 mL | 1 gal | 3.79 L |
For oil-injected systems, follow the manufacturer's instructions for filling the oil reservoir. Do not pre-mix oil for oil-injected systems unless specifically instructed by the engine manufacturer.
4. Storage and Handling
Proper storage and handling are crucial for maintaining the quality of the oil and ensuring safety.
- Store in a cool, dry place away from direct sunlight and extreme temperatures.
- Keep the container tightly closed when not in use to prevent contamination.
- Store away from open flames, sparks, and other ignition sources.
- Keep out of reach of children and pets.
- Dispose of used oil responsibly according to local regulations. Do not pour down drains or onto the ground.

Figure 4.1: Side view of the oil bottle, showing measurement markings for accurate dispensing.
5. Safety Information
WARNING: This product is known to the State of California to contain chemicals that may cause cancer or reproductive harm. For more information, visit www.P65Warnings.ca.gov.
DANGER: Contains lubricating oil and petroleum distillates. Avoid prolonged or repeated contact with skin. Use only in a well-ventilated area. Do not use near heat, sparks, flame or sources of ignition. If swallowed, do not induce vomiting. Call a poison control center immediately. KEEP OUT OF REACH OF CHILDREN.
- Wear appropriate personal protective equipment, such as gloves and eye protection, when handling oil.
- In case of skin contact, wash thoroughly with soap and water.
- In case of eye contact, flush eyes with plenty of water for at least 15 minutes and seek medical attention.
- If inhaled, move to fresh air. If breathing is difficult, administer oxygen and seek medical attention.
- In case of fire, use foam, dry chemical, or carbon dioxide extinguishers. Do not use water stream.
6. Specifications
| Attribute | Detail |
|---|---|
| Brand | MERCURY |
| Model Number | 92-858021K01 |
| Part Number | 858021K01 |
| Volume | 1 Quart (32 fl. oz. / 946 mL) |
| Oil Type | Premium 2-Cycle Engine Oil |
| Certification | TC-W3 Certified |
| Viscosity | 15W-50 (SAE Grade, as listed in product specifications) |
| Vehicle Service Type | Water Scooter (and other 2-stroke applications) |
| Item Weight | 1 pound (approximate shipping weight) |
| Product Dimensions | 11 x 8 x 7 inches (approximate packaging dimensions) |
| UPC | 745061029699 |
7. Troubleshooting
While this product is straightforward to use, here are some common considerations:
- Engine Performance Issues: If experiencing poor engine performance after using this oil, first verify that the correct oil-to-fuel mixing ratio was used (for pre-mix engines) or that the oil injection system is functioning correctly. Ensure the oil is not contaminated.
- Smoke from Exhaust: Excessive smoke can indicate an incorrect oil-to-fuel ratio (too much oil) or an issue with the engine's combustion. Refer to your engine's manual for proper diagnosis.
- Oil Contamination: If the oil appears cloudy, discolored, or contains foreign particles, it may be contaminated. Do not use contaminated oil; dispose of it properly and use a fresh, sealed container.
- Storage Issues: If the oil has been stored improperly (e.g., in extreme temperatures or with the cap loose), its properties may degrade. It is recommended to use oil stored under optimal conditions.
For persistent issues, consult a qualified marine or small engine mechanic, or refer to your engine's specific service manual.
8. Warranty and Support
Mercury provides warranty protection for Mercury, Mariner, Force, Jet Drive, and Sport Jet 2-stroke engines when used with genuine Mercury lubricants. For specific warranty details and support, please refer to the documentation provided with your Mercury engine or visit the official Mercury Marine website.
For further assistance or inquiries regarding MERCURY Genuine Premium 2-Cycle Oil, please contact Mercury Marine directly or visit their official website:
- Manufacturer: Mercury Marine
- Website: www.mercurymarine.com
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