Mercruiser outdrive

[thundercraft79]

i have a 1988 mercruiser 3.0 with mercruiser outdrive. i am new to the inboard motors and was wondering how/if you could change the lower unit grease. i am use to the outboard motors with 2 screws on the lower unit. so im pretty lost. thanks

 

[Don S]

Re: Mercruiser outdrive

For one thing, you don't change "Grease" you change the gear lube.
There are still 2 screws, a drain like an outboard lower, then on the upper gear case there is a vent screw.
Fill from the bottom as an outboard till it comes out the top.
Head up to the Adults Only sticky and download the manual for your engine and drive. Time to do some reading since you are new to that setup.

 

[thundercraft79]

Re: Mercruiser outdrive

ive looked everywhere for the 2 screws to drain and put new lube in. there are no screws whatsoever

 

[WizeOne]

Re: Mercruiser outdrive

ive looked everywhere for the 2 screws to drain and put new lube in. there are no screws whatsoever

Are there two threaded holes with nothing in them? One high and one low?
Has to be one or the other!

 

[thundercraft79]

Re: Mercruiser outdrive

there are no screw holes/ or studs anywhere on the upper or lower unit. unless they're microscopic and i cant see them. ive changed lube before on outboard motors i know what they should look like. but this boat does not have anything of that sort anywhere on the outdrive

 

[WizeOne]

Re: Mercruiser outdrive

there are no screw holes/ or studs anywhere on the upper or lower unit. unless they're microscopic and i cant see them. ive changed lube before on outboard motors i know what they should look like. but this boat does not have anything of that sort anywhere on the outdrive

How about post some pictures? One for each side of the drive OR down load the appropriate manual. There are pictures in it, for the location of the screw plugs.

Believe me, they are there!

 

[Bondo]

Re: Mercruiser outdrive

there are no screw holes/ or studs anywhere on the upper or lower unit.

Ayuh,...

The Fill/ Drain is on the leading/ lower edge of the Bullet, portside...

The Vent is a couple inches below the top, also portside...

 

[thundercraft79]

Re: Mercruiser outdrive

found what i was looking for. i guess somebody painted over the plugs