Sweet deal, I got mine for free with a trailer, I just got the parts which include the head gasket and exhaust gaskets from SBT. Also SBT has a forum on there site thats pretty busy and PWCtoday has lots of activity on their forum as well. I'm a member on them all, also I will keep everyone posted on my status to return this 640 to shipshape. Laterz good luck,
Don't put Oil in there like I did-its hard to get out. actually did not harm the thing but delayed getting a Barracuda re-vamped. It runs well today.
I acquired a 900 that's giving me fits with triple carb adjustment/compression concerns. Persistence is needed on these units but when you get them right they are a blast