Martin Posted September 9, 2015 Share Posted September 9, 2015 Guys, we just got a ProStar with 300 hrs on it. Pylon was moving from set 1. Tightened it up twice already (all 4 bolts) and it is still moving 2-3 inches all the way around. Any advice on how to make this stop? Thank you. Link to comment Share on other sites More sharing options...
Baller Jordan Posted September 9, 2015 Baller Share Posted September 9, 2015 have you tried Loctite on the threads? Link to comment Share on other sites More sharing options...
Martin Posted September 9, 2015 Author Share Posted September 9, 2015 I have not. It moves the very first set right after we tight it up. Link to comment Share on other sites More sharing options...
Baller Roger Posted September 9, 2015 Baller Share Posted September 9, 2015 I drove one in a tournament this past weekend and the pylon was moving a lot. The owner said he just tightened it the night before. Link to comment Share on other sites More sharing options...
markchilcutt Posted September 9, 2015 Share Posted September 9, 2015 sounds like a warranty issue. Link to comment Share on other sites More sharing options...
Baller dbutcher Posted September 9, 2015 Baller Share Posted September 9, 2015 Try double or even triple nuts on all the bolts. Link to comment Share on other sites More sharing options...
Baller GOODESkier Posted September 9, 2015 Baller Share Posted September 9, 2015 Seen this on the Malibu, but all prostars I have skied on are solid. One I ski on a fair amount. Link to comment Share on other sites More sharing options...
Baller Razorskier1 Posted September 9, 2015 Baller Share Posted September 9, 2015 @Martin -- it is the bolts through the floor. The four around the pylon aren't the issue. Get someone under the boat with an allen wrench on the tracking fin, someone in the boat with a wrench on the nut on the floor. That's where the movement is coming from. Link to comment Share on other sites More sharing options...
Baller Roger Posted September 9, 2015 Baller Share Posted September 9, 2015 @Razorskier1 - That makes sense as the boat judge I had said he could feel the floor move under his foot when it was next to the pylon. I'll pass this on to the owner. Link to comment Share on other sites More sharing options...
Baller Razorskier1 Posted September 9, 2015 Baller Share Posted September 9, 2015 I went through the exact same thing with mine. Link to comment Share on other sites More sharing options...
Baller bkreis Posted September 9, 2015 Baller Share Posted September 9, 2015 a friend had that issue w a 2014, and it had almost undone itself from the tracking fin Link to comment Share on other sites More sharing options...
Baller LLUSA Posted September 9, 2015 Baller Share Posted September 9, 2015 Seems to be a common issue Link to comment Share on other sites More sharing options...
markchilcutt Posted September 9, 2015 Share Posted September 9, 2015 Good to know i will be checking mine tonight! Link to comment Share on other sites More sharing options...
Chuck_Dickey Posted September 10, 2015 Share Posted September 10, 2015 Ditto @Razorskier1 the tracking fin bolts worked loose. I tightened mine and problem solved. Has not come back in a year. Better check before my next tournament. Link to comment Share on other sites More sharing options...
Baller 6balls Posted September 10, 2015 Baller Share Posted September 10, 2015 Seems to be a screwy design. Link to comment Share on other sites More sharing options...
Baller Razorskier1 Posted September 10, 2015 Baller Share Posted September 10, 2015 Think the design is right -- you want thru bolts for maximum strength for both the pylon and the tracking fin. I've understood some manufacturers don't do that, and was told that they experience fins coming off, along with a chunk of the bottom of the boat! What I don't understand is why not have the fin side of the bolt be shaped and inset into the fin so that you don't need two people to tighten it back up again? Link to comment Share on other sites More sharing options...
Baller oldjeep Posted September 10, 2015 Baller Share Posted September 10, 2015 Or better yet, why are they not using stover nuts so that they don't come loose in the first place? Link to comment Share on other sites More sharing options...
markchilcutt Posted September 10, 2015 Share Posted September 10, 2015 Sounds like some loctite may be in order? Link to comment Share on other sites More sharing options...
Baller 6balls Posted September 10, 2015 Baller Share Posted September 10, 2015 Not questioning the strength of the mounting system, just questioning why 1.) it comes loose and 2.) you need two people to tighten...one of whom is under the boat. They have been putting pylons in boats for a mighty long time now would think that part would be all dialed. Link to comment Share on other sites More sharing options...
Baller Roger Posted September 10, 2015 Baller Share Posted September 10, 2015 If all that's not enough, I spoke with the owner of the boat I drove and he said the 15 differs from the 14. The 14 had the pylon bolted through to the tracking fins, but the 15 has changed to a metal plate glassed in to the stringers. I've never looked inside at either, but both methods are coming loose... Link to comment Share on other sites More sharing options...
Baller Razorskier1 Posted September 10, 2015 Baller Share Posted September 10, 2015 Roger - my 15 is bolted thru the tracking fins. Link to comment Share on other sites More sharing options...
Baller Texas6 Posted September 10, 2015 Baller Share Posted September 10, 2015 In theory the idea had merit assuming it never comes loose. My understanding is those fins have been glassed in for years and this should add some rigidity to the design. I could be off base here but know my neighbor just had his LXi fins break loose after a shallow beaching and they were simply glassed in Link to comment Share on other sites More sharing options...
Baller oldjeep Posted September 10, 2015 Baller Share Posted September 10, 2015 Lxi fins are just lag bolted on. Link to comment Share on other sites More sharing options...
Baller GAJ0004 Posted September 10, 2015 Baller Share Posted September 10, 2015 I think on most boats the fins are designed to break away if you hit something otherwise it could rip the hull apart. If the pylon is loosening up, take it to the dealer and make sure they send someone out from the factory to investigate. That should not happen on a brand new $80,000+ boat. Link to comment Share on other sites More sharing options...
Martin Posted September 11, 2015 Author Share Posted September 11, 2015 The issue were the bolts that go through the bottom of the boat. I agree those should not be loose after one summer of skiing. Hopefully they will stay tight for a while now. Link to comment Share on other sites More sharing options...
Baller Wayne Posted September 11, 2015 Baller Share Posted September 11, 2015 Has anyone removed the bolt that passes through the hull to see if it had any thread locking compound applied? Just a guess is that you have an aluminum pylon they gets sun exposure so it should be mildly warm. The bolt from underneath is cool from the lake water and cycling the boat in/out of water may cause enough expansion/contraction cycles to allow the bolt to relax or break the thread locker free and relax. Wild guess in my speculation above but for anyone that has had a pylon loosen I would apply red loctite and torque the bolt to proper specs. This may be the other issue is a build process issue and some of the boat assemblers are not putting a thread locking compound on the pylon bolt when they should. Link to comment Share on other sites More sharing options...
Baller Roger Posted September 11, 2015 Baller Share Posted September 11, 2015 @Razorskier1 - That's interesting. Lou's is as I described above... maybe it was a mid year change though he usually is one of the first to get one. Link to comment Share on other sites More sharing options...
Baller Razorskier1 Posted September 11, 2015 Baller Share Posted September 11, 2015 @ Roger -- mine was built and delivered last October, so it was early off the line. Link to comment Share on other sites More sharing options...
Chuck_Dickey Posted September 13, 2015 Share Posted September 13, 2015 Mine has nylock nuts, once I tightened them they have not loosened. My guess is the waterproof sealant they use may shrink or compress so the original tight bolts become loose. I torqued mine a year ago and have checked twice and they're still snug. Link to comment Share on other sites More sharing options...
Baller ForrestGump Posted September 13, 2015 Baller Share Posted September 13, 2015 @Razorskier1 Actually, that's not very early. Production starts in June with first deliveries in July. Officially 8/1 is new model year date but USCG allows a grace period for mfrs to start production and ship a new model year prior to the official 8/1 date. Link to comment Share on other sites More sharing options...
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