How to Remove Oil From Marine Engine

Most engine manufacturers recommend changing the oil in your boat's engine every 100 hours of use. Alternatively, the general recommendation is to change a marine engine's oil at least once every year. Draining the oil from the engine is the first step to changing the oil, but for some engine types can be the most complicated. Follow the guidelines below to remove the oil from your marine engine (depending on the type of engine setup you have).

Difficulty: Easy

Instructions

Things You'll Need:

• Ratchet set Oil drain pump Catch container

1. Remove the drainplug from the bottom of the engine with the ratchet set, if your engine is equipped with one and you can easily gain access to it. Place the catch container under the drain hole to catch the old oil.

2. Pull the dipstick out of the diptube if your engine is not equipped with a drainplug or it is inaccessible. The oil will have to be pumped out through the diptube using the oil drain pump. If you have a screw-in type of pump, screw the adapter into the top of the diptube, situate the drain tube in the catch container and start pumping.

3. Slide the oil drain pump sump tube down into the dip tube if you do not have a screw-in type pump. Situate the the drain tube in the catch container and then pump all of the oil out of the engine.

Tips & Warnings

• If you are working on a small motor, it is possible to drain the oil out of the fill hole but unscrewing the cap and turning the engine upside down.
• Make sure to use the properly sized pump for your application as using equipment that is not suited for your motor could be detrimental to the programs performance.

Resources

• Instructions on removing and replacing the oil in gas and diesel marine engines

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