View Full Version : Driveline Packing 88 Prostar 190

05-16-2009, 06:34 PM
How do I re-pack it? I have been taking a little more water than I would like when I leave the boat in the water overnight and I cant see there being any other source. Any help? Thanks

05-16-2009, 06:51 PM
Here's a couple tutorials, http://mastercraft.com/teamtalk/showpost.php?p=159060&postcount=31
and http://www.mastercraft.com/teamtalk/showpost.php?p=503319&postcount=52 that are
listed under "General Discussion", at the top of the listed forum subjects in, "Frequently Asked Questions".

05-16-2009, 08:56 PM
You may want to consider switching to the gore-tex packing as long as you're doing the job. The material is a bit more expensive but will last longer and seal better with less need for adjustments of the packing nut as time goes on.

05-16-2009, 09:04 PM
I just repacked mine this afternoon. It's easy on a direct drive. I would not want to attempt this on a v-drive.

Tools and parts required:

1. Pipe wrench
2. New packing. I went with the Gore-tex stuff from Skidim that is supposed to be dripless.
3. Tool to pick out the old packing. I ended up using an old cotter pin that I bent to a 90 degree angle, but even a coat hanger with the top cut off will work.
4. Tool to press the new packing in. I used a small needle nose pliers.
5. Exacto knife or other sharp blade to cut packing into pieces.


1. Remove rear floor section. This varies by boat.
2. Loosen packing nut with the pipe wrench. Once it's broken free you will be able to turn it by hand.
3. Remove old packing. Most likely there will be 3 pieces.
4. If the old packing comes out in whole pieces, then use one as a template to cut the new packing. Otherwise, wrap the new packing around the shaft and mark it with a Sharpie. You want each piece to be the circumference of the shaft, but both ends should touch.
5. Put new packing into the packing nut. After the first 2 pieces, I tightened the nut to push the packing in tightly, and then did the third piece. Stagger the joints of each piece by 120 degrees to ensure the best seal.
6. Tighten the packing nut and then go to the lake. Adjust the nut until you achieve your desired drip rate. Check this again after 1-2 hours because it may need to be adjusted.
7. Tighten the lock nut using the pipe wrench to lock the packing nut in place.
8. Replace floor

05-16-2009, 09:04 PM
Here's a source for either packing, http://www.skidim.com/products.asp?dept=1032

1/4" for 1:1 transmission, 3/16" for PowerSlot