So a buddy of mine let some girls ride his 90 SN last labor day, ended up sinking the ski.. We got it to the shore and emptied out all of the water that we could. We could get it to turn over but it wouldn't stay on.. Continued to turn it over until the battery had died, hopefully leaving no water in it. He put it in the garage and forgot about it.. Well it's now my ski.. Haven't tried starting it yet because I'm waiting on a new exhaust but what should I be looking for.. Do you think it'd be safe to replace anything right away? Thanks for any help.