How To Change The Oil In An Inboard Outboard Boat. Most inboard marine engine manufacturers recommend you do it once per year or every. If the motor breaks, it’s also much more expensive to replace (since it is usually a car engine).
Turn off your engine and locate the engine oil port. Take a good look at the used fluid once it's removed. Just like getting the oil changed in your car, you need to change engine oil in your boat.
The gearbox must be in a vertical position when the oil is changed, meaning that the drain holes are underwater. Gently ease the bow to within a couple of feet of the dock, come out of gear to slow momentum, then with the wheel turned to starboard, use a bit of reverse to swing the transom into the dock. Since inboard boat motors are basically automotive engines adapted to powering a boat, one could expect changing the oil in an inboard would be similar to changing the oil in a car or truck.
While a reduction in this resistance is called viscosity breakdown. If the engine is stored in freezing temps over the winter, the water/oil mix in the drive can freeze and burst the casing, a huge. Simply put, the thicker the oil, the more it adheres to the metal parts.
Most folks change their gear oil when the engine is winterized. Let the engine run until you see antifreeze flowing out of the boat’s exhaust. This stage can be somewhat tricky if the housing has become corroded.
Changing the engine oil and filter is an essential step to winterize inboard boat motor. Viscosity is the resistance to flow of a particular oil; It’s definitely something you don’t want to avoid doing either.
You will need an oil filter wrench to remove and change your oil filter. There are two basic sizes of oil filters used depending on which model mer cruiser engine you have. Proactively changing a boat engine’s oil and the filter will help the engine perform at it’s best and also prevent expensive repairs in the long run.