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Cannot add oil to lower unit

Stuart Ballew

New member
I pulled the drain plug to the foot and removed the top vent screw. No oil drained out. So, I attempted to squirt 90 weight oil into the lower hole but could not get any oil into the foot. I then tried to squirt some in the top vent hole and could not.

Not sure what to do next.
 
1987 Tracker 40 hp. S/n tag says 40elo. Mariner 6e9 L 430868. From what I was told it was made by Yamaha.

No pics of the screw. It and the vent plug were clean. I just changed the seals behind the prop because no oil drained out
Of the foot when I checked it. Is it possible the channel from the gearbox to the vent hole is blocked?
 
Only way this could be possible is gearcase full of water and frozen solid.....some of those models there are 2 screw at AV plate..one is vent and other is flush.
 
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