1978 ski nautique velvet transmission issue.

Made the test run on mine today. All is good. Cruised around the lake for a few and topped of the fluid. Barefootn tomorrow evening!!!
The only other thing I can think that you may want to make sure of is. There are two large snap rings in the forward clutch assembly. They are different in thickness so they have to go back in the order they came out.

Epoxy resin!

Download tranny manual and use chart to cross numbers off tag to tell u which one u have. It doesn't really matter as far as the kit goes. They send u all the stuff for either. The 10/18 has two reverse plates the 10/17 only one. They make a cooler that's a foot long and as long as u mount it above the tranny cooling shouldn't be an issue unless you don't have pressure. That would mean pump issues which u should discover when u break the tranny down. I put center punch marks on my housing and case to make sure it all went back together the same. It can only go one way but the punch marks just made it easier and I knew it was the same as when it came apart. I have pics and studied it thourghly before I did anything. The kit does not come with all snap rings so keep up with them you will have to reuse most of them. Same with thirst washer. Hope this helps

Simple trans to rebuild, I did mine,just pay attention to the manual. X2 on Hale marine, Chris will help you out. Keep an eye on pressures and temp after rebuild, I had a small piece of something get stuck in the selector valve and the tranny over heated. This time I put 4 hours on it with a gauge and an IR temp gun.
When it was raining, was the boat covered? Just curious.
Did you mean "71C"?

Just got thru doing mine today. They are very simple drive lines. You can download a manual on line. Use the reference chart to cross the numbers off the tag on the tranny. That will tell you exactly which one you have. The best price I found on the major overhaul kit was $140 at hale marine. As long as you don't have any bad bearings or gears that's all you will be out. You may want take a look at your flex plate while you got it out. I replaced mine. Just go step by step from the manual. The overhaul kit is for a 10/17 or a 10/18. The manual shows both. The only real difference I seen was the 10/18 has 2 reverse plates. A good wire wheel on an angle grinder will make short work of all those 35 year old gaskets. That was the most work.

Could be a number of things-I would pressure test your trans oil cooler first-check the bottom of your bell housingfor trans fluid-if they check out,drain the milky fluid from your trans and fill it with fresh fluid.Good luck

I just put the boat in the water yesterday and went about a mile or so up river. I docked the boat for about an hour cause of the rain. When the rain stopped I got back in the boat and went down river about haft a mile. I notice it felt like transmission was slipping. I slowed down to about 20mph or so when I got back to the dock I opened the hood or engine cover and noticed milky looking fluid in the hull. So I check the oil from the dip stick its good. I check the trans and its like barely on the dipstick. I cant see any leaks and am not sure what I need to do first.