Also having a look at the oil during a Mercury outboard lower unit oil change will give you details on the state of the motor's internal components. Makes it a nice clean simple job. Thereafter you will need to locate and identify both the upper and lower Fill and Drain Plugs. The additive in such oil is normally of a higher water demulsability and has corrosion protection. It protects anti-pollution systems, increases the life of diesel particulate filters (DPF) and provides outstanding wear and corrosion prevention to help extend engine life. Changing the lower unit oil of a Mercury outboard provides the proper lubrication for the internal components of the motor, while removing normal shavings from the oil.
Quickly remove the bottle from the bottom hole and install the drain plug. 10W-30 Full Synthetic 4-Stroke Marine Engine Oil contains 45 percent more dispersants, 24 percent more detergents and 49 percent more anti-wear additives than the synthetic blend. Continue to add oil until the lubricant is flowing freely from the top hole and is free from any air bubbles. Screw the pump adapter into the drain plug and with the one vent engine pump till you have oil coming out and then a little more to reduce the bubbles. When not on the water, marine engines often sit in storage for long periods of disuse during the off-season. It outperforms automotive gear oil in marine applications by providing maximum protection against excessive wear in the presence of water and helps prevent corrosion and pitting. We recommend original manufacturer marine oil for best performance and longivity. Mercury Marine gear lube outperforms automotive gear oil in marine applications because of its specialized additive package designed for marine gear cases. Allow all of the oil to drain completely from the lower unit. Maintaining your Mercury outboard lower unit provides a peace of mind knowing that your boat's motor will function efficiently when out for a day on the water. Also, be sure to consult your outboard motor's owner manual to verify the steps above are in agreement with the manufacturer's recommendation for changing lower unit oil. Changing Oil for Your Lower Unit in a Mercury Outboard. Enhanced gear, bearing and seal cleanliness. It provides outstanding shear strength and viscosity stability for better bearing protection and superior corrosion prevention.
Excellent resistance to water and moisture. Engine should be vertical in the fill/drain processes. 00 for the three of them. Premium 2-Stroke Engine Oil is formulated to meet the needs of low- to mid-horsepower two-stroke outboard engines under general marine operating conditions. Im guessing mercurys lower unit oil... but I dont know if it needs to be synthetic or not or what. It's FC-W and FC-W Catalyst Compatible and exceeds all marine industry oil requirements to help maintain peak engine performance and reliability.
Features: Water intrusion - advanced emulsifiers prevent foaming to protect gears if water enters gear housing. It provides maximum protection for OptiMax and DFI engines, outperforming other oils by combining a modified base stock blend with a synthetic additive package that provides superior resistance to piston scuffing, minimizes carbon build-up and helps maintain engine top-end speed and acceleration. 25W-50 Synthetic Blend 4-Stroke Marine Engine Oil is formulated with additives designed to maintain performance under high-heat and high-rpm conditions. Marine engines frequently run for extended periods of time at high rpm or wide-open throttle, often in corrosive saltwater. If not removed, this jumbled mess could destroy the seals that contain and protect the oil inside your gearcase. There are various tools available in order to re-fill the oil, such as squeeze bottles and tubes. Great protection of components from rust and corrosion in dry conditions and in moist conditions. Keep the bottle or tube in the bottom pug and reinstall the top plug. It's FC-W and FC-W Catalyst Compatible and recommended for all brands of four-stroke outboards. 5W-30 Full Synthetic Turbocharged Direct Injection Diesel Engine Oil resists thermal breakdown and oxidation under extreme conditions to optimize Turbocharged Direct Injection (TDI) diesel engine performance in marine applications. The only thing that I do additional is, replace the gaskets around the drain and vent plugs. Not fixing this problem will result... Mercury lower unit oil changes are an important part of maintaining an outboard motor. For use in all outboard lower units and jet pumps below 75 hp except outboards with electric shift gears.
Developed to eliminate thermal breakdown under extreme rpm, temperatures and loads, it provides the best wear and corrosion prevention for any engine, especially those operating at maximum output and high temperatures for extended periods of time. Choose the right lubricant for your engine or gearcase. The first engine manufacturer to develop oils that meet the National Marine Manufacturers Association® (NMMA) FC-W® standards for all four-stroke engines, Mercury rigorously tests its Precision Lubricants products to meet our high standards to protect your outboard, inboard or sterndrive engine and provide many years of reliable service and fun on the water. Then with a cleaned off magnet on the drain has it, some don't, remove the pump adapter and insert the screw. Formulated for all marine diesel engines, including Mercury, MerCruiser® and D-Tronic, 15W-40 Heavy Duty Diesel Engine Oil helps control the formation of sludge and varnish deposits in high-stress applications to protect diesel emissions systems, diesel particulate filters and Selectively Catalytic Reduction Systems. 10W-30 Synthetic Blend 4-Stroke Marine Engine Oil offers all the features and benefits of mineral-based oil along with industry-leading shear strength and corrosion inhibitors for better corrosion resistance and wear protection.
Excellent instructions. West Marine has them as well as your local Merc dealer. Once all the oil has been completely drained, the lower unit will have to be re-filled. Continued use of this gear case lubricant will: Provide maximum protection against excessive wear - even in the presence of water Prevent corrosion and pitting Help extend gear life. Read more about brand name vs generic oils here. It also provides excellent shear stability to protect internal engine components against corrosion and wear. 85W-90 Extreme Performance Gear Lube is recommended for use in racing, high-performance and extreme-duty gearcase applications.