How to change lower unit oil

How to Change Lower Unit Oil Mercury 99 - YouTube. Shut the motor down.

Locate your drainfill plug screw and adjust the trimtilt of your outboard motor or sterndrive so that this plug is in the lowest position possible in order to drain the used oil thoroughly.

How to change lower unit oil. Changing the Lower Unit Oil. The lower drainfill plug screw is usually located on the starboard side of the lower unit beneath the bullet-shaped portion of the lower unit housing. Locate your drainfill plug screw and adjust the trimtilt of your outboard motor or sterndrive so that this plug is in the lowest position possible in order to drain the used oil thoroughly.

How To Change your Boats Lower Unit Oil - YouTube. How to change outboard lower unit oilChanging the Gear Lube in the Lower Unit. Locate the lower and upper drain holes which will be plugged with a screw.

After placing the drain pan below the lower unit remove the lower screw. Oil will begin slowly draining out. Next remove the upper screw.

This will allow air to flow into the lower unit displacing the oil and the remainder will drain out quickly. Make sure you do not mix different oil brands or weights. To refill the lower unit insert the bottletube into the BOTTOM drain hole.

Then slowly squeeze the bottle to force the oil into the lower unit. Continue adding oil until the lubricant is flowing freely from the. How to Change Lower Unit Oil Mercury 99 - YouTube.

How to Change Lower Unit Oil Mercury 99. If playback doesnt begin shortly try. To refill the lower unit insert the bottle or tube into the bottom drain hole and slowly squeeze the bottle to force the oil into the lower unit.

We recommend original manufacturer marine oil for best performance and longivity. The lower drainfill plug screw is usually located on the starboard side of the lower unit beneath the bullet-shaped portion of the lower unit housing. Locate your drainfill plug screw and adjust the trimtilt of your outboard motor or sterndrive so that this plug is in the lowest position possible in order to drain the used oil thoroughly.

With all old oil drained you can now connect the pump adapter to the lower drain hole and your bottle of oil and start to fill the lower unit. Youll be able to tell that its become full when you start to see oil dribble out of the upper vent plug hole. Welcome to the step-by-step guide to changing your outboards lower unit oil.

This 8-step process is all it takes to ensure the oil in your lower unit is properly maintained. The chart at the end of this guide lists the approximate amount of oil needed to fill the lower unit of each model currently offered by Tohatsu. Running your outboard without completely filling the lower unit with oil to the proper level will cause severe damage to your outboard.

See the comments at the end of this guide on how to check for the proper oil level in your lower unit. Be sure and properly dispose of your old oil by taking it to an oil recycling center. Most quick lube oil change centers or auto service stations.

Shut the motor down. Remove the lower units vent plug a large bore countersunk screw which you may remove with a standard slotted screwdriver. If oil does not leak from the vent plug when you remove the screw the lower unit oil level is low.

Slip a basin under the bottom of the motor to catch the oil as it drains from the lower unit. Loosen the drainfill plug on the bottom of the lower unit with a screwdriver and remove the plug. Rub the magnetized end of the plug between your thumb and forefinger feeling for bits of metal.

If you have removed the lower unit and bumped it you might have to re-adjust for Neutral if the shift linkage isnt lined up. In most cases you simply need to rotate the spline shaft to align the shifting again. Grab it with a set of pliers and rotate it until you feel it snap back into Neutral.

Its best to always have some extra drain plug gaskets on hand. Once all the lube has drained refill the lower unit by threading the appropriate fitting into the lower unit drain screw opening on the bottom of the bullet and slowly pumping in fresh Yamalube Marine Gearcase Lube or Lubricant HD. Winterizing Outboard Motor Lower Unit October 14 2021 by masuzi Changing lower unit gear oil winterizing your outboard motor west how to winterize your.

Changing the lower unit oil should be a regular part of your outboard maintenance schedule. The oil that comes out as you drain the lower unit can tell you a lot about whats going on inside the gearcase. Milky lower unit oil means you have water in the oil which means youve lost a seal somewhere.

The first place to look is the output seals. Coat new O-rings or sealing washers with engine oil and place one on the oil drain bolt and one on the oil level bolt. Add oil through the oil drain hole until it flows out the oil level hole filling the gear case from the bottom up to the top.

Install the oil level bolt in the oil level hole and tighten. You can buy a little hand pump or just use the pointed end of the oil containers cap to inject the oil. But if you decide to just squeeze the bottle method grab a second quart because you can only squeeze 23 of a quart till it wont squeeze anymore and some fancy.

Install the oil level plug and a new O -ring or sealing washer in the oil level hole and tighten. Remove the oil pumpoil bottle and quickly install the oil drain plug with a new O-ring or sealing washer. A slight amount of gear oil will be lost when installing the plug.

Tighten the oil drain plug and oil check plug securely. Wipe any oil from the outboards lower unit with clean shop rags. Dispose of the used oil according to local law or regulations.

Wash the whole outboard with a mild grease-dissolving detergent and warm water to complete the gear oil change.