lower unit gear lube

billy boater

Seaman
Joined
Oct 28, 2008
Messages
59
hey there i was wondering if someone could tell me the proper procedure for filling my outdrive. its a omc with a 2.3 ford motor in it. i bought a oem service manual on ebay but wont see it for a couple more days. so if anyone out there has one for that motor and could tell me the proper way to do it i would appriciate it. i thought somone told me before that there was a certin procedure u had to follow. and u cant just fill it from the top. and also what is the best gear lube to use for those drives. thanks much
 

HT32BSX115

Supreme Mariner
Joined
Dec 8, 2005
Messages
10,083
Re: lower unit gear lube

Howdy,

This is an OMC Cobra?

It has 3 openings.

The bottom one is the drain. [DO NOT FILL IT FROM THE BOTTOM]

The middle one is the "fill" port.

The top one is where the dipstick goes.

According to your OMC manual you should fill it only from the "fill" (middle) port.

Fill it until it shows full on the dipstick with the dipstick resting on the hole (this allows a slight over-fill)
THEN run the drive, and do subsequent level checks with the dipstick SCREWED ALL THE WAY IN.

Any trapped sir will then reduce the level so check it frequently.

You can use most any good grade GL-5 gear lube.

I like Mercury HP gear lube (synthetic) Others like Volvo Mobil1, or Amsoil synthetic gear lube etc.

The Mercury stuff is available from West Marine, Boaters World (until about June....then they're closing for good!:eek:) and a lot of Walmarts (which probably has the best price)


Cheers,


Rick
 

Gary H NC

Fleet Admiral
Joined
Dec 1, 2005
Messages
8,972
Re: lower unit gear lube

Be sure to replace the plastic O-ring gaskets on the plugs.
About 50 cents each at any Evinrude-Johnson dealer...They should be replaced every time the plugs are removed.
That drive should hold at least 1 1/2 quarts of lube. I know the 4.3 Cobra holds 64 ounces exactly but the 2.3 may be slightly less.
Fill it slow,
You can get the lube pump for about 8 bucks at Walmart in the boat section...
 

Schmoe

Petty Officer 2nd Class
Joined
Feb 10, 2004
Messages
117
Re: lower unit gear lube

Walmart will only have the Premium, not the synthetic High Performance Mercruiser stuff.
 
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