September 3, 2008 | Outboard Motor Oil

How to Change Your Outboard Motor Oil and Filter, Part 2

How to Change Your Outboard Motor Oil and Filter, Part 2

The oil filter will need to be changed every time the outboard motor oil is changed. Be sure and place a couple of rags or absorbent pads under the filter cap to collect potential oil or debris. Try to loosen the cap, using the appropriate wrench. You may have to clean the filter cap with an absorbent pad; if this doesn’t work, get a screwdriver and hammer and tap the screwdriver tip down into the cap, rotating the existing oil filter until it loosens enough to be removed.
Before you replace the old oil filter with a new one, dip your finger into the old oil and rub a bead of oil around the edge of the new oil filter’s gasket o-ring, which will ease the future removal of the new filter when it needs to be replaced with the next oil change. If you will be boating in a hot climate that stays above 40 degrees Fahrenheit, use 25W-40 motor oil; in a cooler climate, use a 10W-30. Screw the new oil filter into position. Tighten the new oil filter by hand, ensuring it is snug with an additional ¾ to 1 full turn. Once the oil filter is in place and the drain plug is secured tightly, remove the plug for the fill and add the new oil using a funnel. Check your manufacturer’s manual for specifications regarding the amount of oil to use. Finally, check your dipstick to make sure there is enough oil. For environmental purposes, please dispose of discarded outboard engine oil at an approved hazardous materials collection center. Happy boating!

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How to Change Your Outboard Motor Oil and Filter, Part 1

How to Change Your Outboard Motor Oil and Filter, Part 1

With a four-stroke outboard motor, you will need to change the boat motor oil at frequent intervals. (A traditional two-stroke outboard motor doesn’t require engine oil because the oil and gasoline mix provides lubrication for the motor.) For a four-stroke outboard engine, it is generally recommended that the oil is changed once a year or every 100 hours of running time in fresh water, whichever comes sooner. For saltwater usage or if the four-stroke motor is run hard, the oil should be changed twice as often-for every 50 hours of running time and or twice a year if you are a frequent boater. A tip before you begin: have plenty of rags or absorbent pads ready to use during and after the oil change.

Pull the boat out of the water onto dry land and remove the engine cover (which usually is secured with one or two latches), setting it off to the side so that its surface does not become scratched. The top section of the outboard engine is called “the power head” and below it is the lower gearcase. Pull out the dip stick to assess the condition of the oil inside the crankcase. The drain plug is in the midsection of the outboard engine, and it will need to be loosened in order to drain the oil.

A table can be helpful to provide some leverage for the draining process. One technique is to turn the steering wheel so that the drain plug on the motor is facing inward, placing an oil pan on the table and under the drain plug to catch the existing oil. Back the drain plug out with the appropriate socket wrench, having a pan ready to catch the oil, because it will flow freely. Once all of the oil has drained, wipe up excess oil. Replace the drain plug, making sure it is secured.

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