There is a large nut and a small nut on a standard packing gland
. It will take two wrenches to break them apart. First spray the area with a penetrant and after letting it sit get your two wrnches on it and break the little one from the big one. Then you turn the big one clockwise "chasing" the smaller one.
What kind of Wrenches?... large slip joints work, pipe wrenches, etc. Not very good luck with those cheap
home depot adjustable plumbing
wrenches. They also make special wrenches just for the job.
How tight?? A perfect adjustment would not drip with engine
off and a couple of drips a minute with shaft turning. (hard to achieve) When we adjust these, the way we do it is with the shaft turning in reverse, which keep the nut from backing off. Another way to do it if you are hesitant about the turning shaft is to spin the shaft by hand, then adjust, then spin again. It should not get to hard to turn.
After you think you have it, run the engine
for a while and lay your hand on the packing gland
. If you say ow! and pull it away, loosen it up a little. If it is just warm to the touch you are okay.
If the packing has worn out you won't be able to adjust it properly and it will require repacking. An easy job that can be done in the water
. Requires a corkscrew tool that marine
stores sell to get the old out and a pick or two. Get the old packing out and cut a few rings of new teflon based packing. Grease em up and push em in. Always use individual rings, not spiraled as that can bind up the shaft. Adjust it and run engine for a day and check as you may have to readjust.
Good luck, Gary