started, let me just say one thing. NEVER, NEVER, NEVER add outdrive oil thru
the top VENT hole. The top Vent hole is for letting air in and out ONLY. I have
seen so many new boaters attempting to fill the outdrive with oil thru the top
hole, and when they see it coming out of the bottom hole, they think its full
and plug both holes. The outdrive will run for about one hour and then seize up
costing as much as $2,500.00 to repair.
To change the oil, use a large screwdriver and remove the top and the bottom
drain screws. If you have an outdrive oil reservoir inside of the boat, you
should remove the top cap.
Note ! The drain
plug on newer Bravo 1 & 2 drives is behind the propeller. ( item
# 34 )
Completely drain the old oil out of the bottom of the drive. Wait
about 1/2 hour for all of the oil to drain out so there will be no air pocket in
the 1/4 diameter tube which internally connects the lower portion to the upper portion of
Pre-Alpha, Alpha One and Gen II outdrives.
If you get
Alpha 36 oz. of old oil
Bravo I &
2 1/2 quarts of old oil
Bravo II, III and TR 3 1/2
quarts of old oil
and it appears to
free of water ( not
milky ), and you do not find any metallic particles floating in the oil, you are ready to refill the drive.
Before refilling it, inspect the drain and vent sealing washers in the top and bottom holes.
If they are bad, replace them. A bad washer allows water to be sucked past the threads of the
screw when hot oil
is cooling down. Use a quart bottle pump or a
5 gallon pail pump and with the drive in an
upright position ( not laying on its side or up at an angle ) pump in the same amount of
new 80- 90w or a Synthetic outdrive oil as listed above. The oil MUST be pumped
in through the bottom drain hole until it comes
out through the top vent hole. Once it comes out of the top hole, you can put
the screw back in the top hole and if you have a reservoir
inside of the boat, keep pumping the oil through the bottom hole until it fills the reservoir.
Plug the bottom hole and replace the cap on the reservoir if you have one.
Please note ! On
Newer Bravo 1 & 2 outdrives, the lower drain plug is located in the bearing
carrier assembly located in the lower housing. If you remove the propeller you
will see it directly below the propeller shaft. ( item
# 34 )