Making Engine Oil Changes Easier

Try relocating the engine oil filter and using a drain pump.


engine-mounted oil filter

Photos by Patrick Childress

engine oil filter

oil change drain pump

Some boat manufacturers have no concern for simplifying things, like changing the auxiliary engines oil, once the boat leaves the factory. But the process should not be more than a 15-minute job, and at most, only a few drops of oil should need to be cleaned up.

Filter access

One extremely important upgrade is to move the oil filter-usually mounted horizontally or in some nearly inaccessible location-to a vertical position on the engine room bulkhead. This is accomplished by installing an engine oil filter adapter kit. Check with the local distributor for your engine to find out which adapter kit will fit your engine.

The installation is simple. First, remove the engine oil filter, then screw on the new engine mount adaptor. Run the two hoses from there to the new remote filter.

With an unobstructed oil filter hanging on a bulkhead, you can also use a longer filter with greater filtering capacity than the engine-mounted filter. Be sure not to place the filter too high above the engine, or else youll risk the oil-circulation pump becoming air bound because it will have too much air to displace, and as a result, suction will suffer and the oil pressure will remain zero.

The bulkhead-mount location allows a plastic bag to be wrapped around the filter to catch any oil that might spill out when the filter is unscrewed. A sliced Clorox bottle placed underneath the filter mount will catch any residual drips that may occur when the filter is changed.

If the filter is seated with the open face at the top, fill it with lube oil before screwing it onto the remote, bulkhead mounted flange.

Oil change

A 12-volt oil drain pump allows you to clear warm engine oil in about two minutes. To install the pump, the oil drain plug at the oil pan is replaced with a threaded hose barb. Because there is no standard thread for a drain plug, you have to be very careful to match the threads. Oil-change pump kits often come with a variety of threaded barbs for this reason. Connect one end of the hose to the barb and the other end to the oil pump; mount the pump on a convenient bulkhead. The installation is completed by connecting the appropriate 12-volt wires and fuse to the pump.

Use a clear hose for the pumps exit hose so that there will be no surprises when the oil begins to discharge. An electrical wire support clamp can be mounted above the oil pump where the end of the discharge hose is stored. At this higher elevation, it allows any residual oil to drain back toward the pump and engine.

Leaving the shutoff valve for this hose in the open position for a few minutes helps to facilitate the draining.

Practical Sailor has been independently testing and reporting on marine products for serious sailors for more than 45 years. Supported entirely by subscribers, Practical Sailor accepts no advertising or any form of compensation from manufacturers whose products we test. Testing is carried out by a team of experts from a wide range of fields including marine electronics, marine safety, marine surveying, sailboat rigging, sailmaking, engineering, ocean sailing, sailboat racing, and sailboat construction and design. This diversity of expertise allows us to carry out in-depth, objective evaluation of virtually every product available to serious sailors. Practical Sailor is edited by Darrell Nicholson, a long-time liveaboard sailor and trans-Pacific cruiser with more than three decades of experience as a marine writer, photographer, boat captain, and product tester. Before taking on the editor’s position at Practical Sailor, Darrell was the editor of Offshore magazine, a boating-lifestyle magazine serving the New England area. Darrell has won multiple awards from Boating Writer’s International, including the Monk Farnham award for editorial excellence. He holds a U.S. Coast Guard 100-ton Master license and has worked as a harbor pilot and skippered a variety of commercial charter boats.


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