How much gear lube does the old style PD lower unit hold. Mine was fully drained over the course of 2 hours and when I refilled it I could only get it to hold 16 oz. which is half of what I was figuring. I even put the plug back in and hand turned the prop 2 revolutuions to make sure there were no air pockets. When I removed the plug gear lube started pouring out so it must be full. What do ya'll think

You are supposed to fill it from bottom plug. That's close thou

I did fill it from the bottom plug, and as I stated it started running out the top when I hit 16 oz. in. I put the top plug in, removed tip of bottle from lower hole and put that plug in, hand turned prop 2 revs and checked level at top plug which was still showing full so evidently no air pockets causing a misread level.

I'm just curious why this time it only took 16 oz. I was thinking more along the lines of 32 oz. (1 qt.)

if you think about it isn't much room in there for it . the Lu housing isn't very big and the shaft takes up most of the room

Might be a dumb question, But why do they recomend filling from the bottom to the top, instead of leaving the bottom plugged and filling until it reaches the top fill hole?

they claim that air can be trapped in the needle bearings when filling it from the top. i am not sure about it because i believe it will work its way out in about .03 seconds. thats them not me

fill from top until it runs out and then recheck it after you run it. Done

Takes less than a qt. I always fill from top. I actualy over fill a bit and then plug it. You could turn the prop by hand if you think you need to work the lube down. Every time I have changed the lube it was still slightly over filled.

Thanks guys!