See full version: Steps for Changing the Oil on a Mercury 40-60HP Four-Stroke Outboard Motor
The video above and the notes below are specific to changing oil on a Mercury brand 40-60hp four-stroke motor. Many of the principles are the same for other motors, but it's recommended to seek out the proper instructions for your specific engine. [links]
Oil is the life blood of any engine. That's why it's important to drain and replace oil whenever your boat will be unused for a significant period of time, particularly at the start and end of each boating season. Check your engine manual for recommendations on how often to change oil based on hours of operation, but always remember it's even more important to change oil when your boat is not in use to avoid acid and moisture from damaging engine parts.
Fresh oil extends the life of your engine, plain and simple. [links]
Before changing oil, it's a good idea to run the engine a few minutes to let the oil warm up and flow, allowing any contaminates to move from the bottom of the pan. Let the engine cool before changing the oil, so you don't burn yourself on it.
Again, it’s a cheaper oil, but it has all of the necessary certifications, including the most important NMMA (National Marine Manufacturers Association) FC-W one. It ticks all the right boxes, and won’t leave your wallet empty either. You even get quite a lot of it for your money too! more
Oil Type: 4-stroke
Oil Weight: 25W-40
Certification: FC-W
Bottle Size: 1 U.S gallon (3.78 liters) here
That means you should use a dedicated marine oil, and nothing else. As tempting as it might be to use the same oil that you’d use for you car, think again. Boat engines have very different oil specifications.
For a start, a marine engine requires an oil that can protect it from the effects of water, resisting rust and corrosion, and all the other problems that are caused by water. But that’s not all.
Time: 1 hour.
9. Stop the engine and check the oil level, adding extra if it's below maximum, until it reaches the proper level on the dipstick. Start the engine again, let it idle some, rev it slightly, and shut off again. Check the oil level one last time. After running for several minutes, check the new filter to be sure it's not leaking around the seal.
3. Remove the drain screw. This one on the starboard side of the exhaust housing is fairly easy to access. Other motors have a drain plug in the aft end of the lower unit. here
Degree Of Difficulty: Easy to Moderate
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Mercury / Mariner engines of Japanese origin here
(Quicksilver part no. 22-953683) [links]
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