(Second attempt to post this hope it's not dual post). O.K. guys, I finally can see where my gear box oil leak is coming from now. I rebuilt the entire lower unit. Put all new seals in and all new 'O' rings in where they belong. I ran the motor in my driveway for awhile, and today I checked the gear box oil to see the condition of it. It was like new still! I added some oil to the gear box just to make sure it has enough oil in it. I now see some of the oil coming out of a tiny hole in the lower unit ABOVE the gear box. It looks to be a vent hole of some type. If anyone has a SELOC repair manual for Johnson-Evinrude 1958-72 models, there is a good picture of the hole I am referring to on page 7-37, fig.157 (lower right in photo) and fig. 158 (bottom of part on the left side in photo). and a good shot of it on page 7-40 fig. 176 and page 742 fig. 184 to the right of the pinion gear in the photo.
The seals are all new. How can the gear box oil get up to the hole and run out? If I overfilled the gear box, would that cause the oil to bypass a seal and come out of that hole? I gave it a little bit "extra" oil when it came out of the top filling vent screw before I put the screw cap back in. It came out of the hole for a little bit then stopped. I ran it in the driveway again, and I got a small amount of water that dripped out of the hole this time. I rechecked the oil, it is clean, and i did not add any more oil to the gear box this time., but I still wonder how it got up to the level of the hole past the seals? Cuz' I overfilled it?
The seals are all new. How can the gear box oil get up to the hole and run out? If I overfilled the gear box, would that cause the oil to bypass a seal and come out of that hole? I gave it a little bit "extra" oil when it came out of the top filling vent screw before I put the screw cap back in. It came out of the hole for a little bit then stopped. I ran it in the driveway again, and I got a small amount of water that dripped out of the hole this time. I rechecked the oil, it is clean, and i did not add any more oil to the gear box this time., but I still wonder how it got up to the level of the hole past the seals? Cuz' I overfilled it?