Broken shaft |
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Martinique ![]() Newbie ![]() ![]() Joined: August-11-2006 Location: United States Status: Offline Points: 19 |
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Not sure how this happened but tonight during the last wakeboarding pull of the night my shaft snapped. Anyone ever have this kind of problem? I was in deep water 40-50ft and no gators where I live in WI. I just got the wakeboader outta water about 3K RPM and then then with no warning the RPM's went through the roof. I know I didn't hit anything but my shaft broke about an inch inside the strut. Very clean brake and no damage to the rutter or boat(not sure how with the Prop spinning that fast). Any how I am thankful no one was hurt and the boat was not damaged. Except for the lost 4 blade OJ. But the big question is how long of shaft do I order and is SKIDIM the best place to get one or does anyone have a spare or a deal on one. My boat is an 86 Martinique with a 351W and a velvet drive 1:1 tranny with a 1" shaft dia. I just put gt40 heads and a edlebrock intake on, could the extra torque snapped the shaft?
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79Tique ![]() Senior Member ![]() ![]() Joined: September-04-2006 Location: United States Status: Offline Points: 380 |
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Had something kind of like that happen one time when we had ran over the rope. The prop cut the rope but a small pice wound up tight, and sucked in with the strut. The shaft proke in a simular spot. This was not on my Correct Craft but could be the same.
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Work to live, not live to work.
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GottaSki ![]() Grand Poobah ![]() Joined: April-21-2005 Location: NE CT Status: Offline Points: 3337 |
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No way no how. Likey fatigued from misalignment or a bottom strike sometime in its life. |
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"There is nothing, absolutely nothing, half so much worthwhile as messing around with boats...simply messing."
River Rat to Mole |
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skicat ![]() Platinum Member ![]() ![]() Joined: May-18-2006 Location: Duluth, GA Status: Offline Points: 1129 |
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Yes, it happened to me in my ex. 71 Nautique. Just took off from the no wake area & a few second later it felt like I hit a brick wall. I guess I was lucky, mine broke just below the coupling so my prop & shaft stayed in the strut. Found a machine shop the next morning close to the lake & the next day I was back on vacation! I am sure over time these shafts can break just because of stress & fatigue.
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eric lavine ![]() Grand Poobah ![]() Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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somewhere maybe on the internet you may find a chart to look at to deternmine what broke the shaft, it shows diifferent types of breaks such as twist, stress so on that is if your curious, the chart illustrates the broken ends and you compare yours to this, i know this because i had a warranty problem in which the man lost a $8000.00 rolla prop which snapped close to the taper. by using the chart we determined the problem to be the shaft
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"the things you own will start to own you"
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79nautique ![]() Grand Poobah ![]() ![]() Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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It's an alignment issue why it broke. Not sure on the length I called MidwestCC and dennis gave me the stock length for my '79 SN which was 50" I had one made at 49.5" and worked out great for my application. Give Dennis a call and I'm sure they can tell you what length you need and you can start to compare prices. The type of material used for the shaft will effect the price.
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81nautique ![]() Grand Poobah ![]() ![]() Joined: September-03-2005 Location: Big Rock, Il Status: Offline Points: 5776 |
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Chris, FYI
Dennis is no longer at MWCC, Bruce is the only guy left with any experience on the older boats. I know Bruce's son is working in parts with him and some other guy but they're relative newbies. |
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You can’t change the wind but you can adjust your sails
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eric lavine ![]() Grand Poobah ![]() Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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If it is an alignment issue, you'll find out on re-install, not saying there is other damage but when we tear a borg apart you can tell the ones that had mis-alignment, sometimes teeth will be broke off the planetary and the case bore will have the planetary wore into it. when you get the shaft in let us know what the alignment is
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"the things you own will start to own you"
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Martinique ![]() Newbie ![]() ![]() Joined: August-11-2006 Location: United States Status: Offline Points: 19 |
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There was no vibration at all so I don't think is was misalinged. The break is super clean I will put up a pic as soon as remove it. My guess after 20 years of service and 1100 hrs it was time to break. Just seemed odd the 1st time in the water after the intake and heads upgrade the shaft broke.
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Tim D ![]() Grand Poobah ![]() Joined: August-23-2004 Location: United States Status: Offline Points: 2637 |
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A friend of mine had the alignment off on his ski tique and the shaft broke, nearly killed him. He was running about 25 and it broke and it slid back and hit the rudder causing an abrupt turn. The steering wheel almost broke his hands and arms. My shaft is 40 years old, never broken.
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Tim D
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eric lavine ![]() Grand Poobah ![]() Joined: August-13-2006 Location: United States Status: Offline Points: 13413 |
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alot of times with mis-alignment you may or may not get a vibration, i would look for that chart i talked about earlier, I cant remember what causes a clean break. a twisting break i believe one side woul be higher. i will also look tonight for that chart it is really informative
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"the things you own will start to own you"
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Martinique ![]() Newbie ![]() ![]() Joined: August-11-2006 Location: United States Status: Offline Points: 19 |
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thanks eric, I looked for the chart but I cannot find it anywhere. If you find please send over.
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boat dr ![]() Grand Poobah ![]() ![]() Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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andy,call me with year model,i will call one of my vendors to check price...........boat dr
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Martinique ![]() Newbie ![]() ![]() Joined: August-11-2006 Location: United States Status: Offline Points: 19 |
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boat dr thanks for the hook up, the shaft has been ordered...let me know about the prop and remmember I am broke.
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boat dr ![]() Grand Poobah ![]() ![]() Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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Andy, ain't nothing but a thang,this is what i do for a living,buy parts ,work on boats,and try to make my clients happy. glad to do a good deed for a CCF,also saved you a lot of money in the process.it ain't BS if you can back it up. Advice is cheap;Knowhow is expensive.............boat dr
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69 Mustang ![]() Senior Member ![]() Joined: April-26-2006 Location: United States Status: Offline Points: 402 |
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After this discussion, I wonder if I should order a new shaft. 78 Ski Tique with around 700 hrs, but I have only put on about 12 of those hours, so I have no idea if it's ever been hit, etc, etc. Hmmm...
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For every complex problem, there is a solution that is simple, neat, and wrong.
"Where the **** are we?" Amelia Earhart. July 2, 1937 |
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Martinique ![]() Newbie ![]() ![]() Joined: August-11-2006 Location: United States Status: Offline Points: 19 |
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not a bad idea if you have the cash and the time. We were one of two boats out and luckly were able to get towed all the way across the lake and back to the dock. I was without outta paddle
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Darrel ![]() Senior Member ![]() Joined: June-16-2004 Location: United States Status: Offline Points: 340 |
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Did you order the double taper shaft?
I just bought and installed one and SKIDIM's price was much much better than CC dealer. |
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Martinique ![]() Newbie ![]() ![]() Joined: August-11-2006 Location: United States Status: Offline Points: 19 |
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boat dr hooked me up with an incredible deal
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p/allen ![]() Gold Member ![]() ![]() Joined: March-14-2006 Location: Dixon Illinois Status: Offline Points: 942 |
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I have gotten 2 shafts for my 72 . Paid 75 apiece for them at local machine shop back 8 years or so . I dont know what kind of stainless they used but it seems to hold up to my 220 hp 302. Dr. , do you know what kind of stainless that shafts are made of ?
Pat |
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boat dr ![]() Grand Poobah ![]() ![]() Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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p/allen my prop and shaft guru says;we offer the following shafts,#17, #19,#22. the higher the # the more resistant they are to corrosion,that tells me #22 contains more nickel and other alloys making it softer but more expensive.#17 is the stock material and specs for C/C. they are the OEM for all of C/C boats.
shaft is 41 in. single taper........boat dr when asked about the break"every part has a service life,w/the clean break sounds like metal fatigue, end of subject" for the price of the shaft i was quoted and the fact i just bought 2 Austals 4 blades,sounds like cheap insurance to the boat dr........... but i could be wrong |
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69 Mustang ![]() Senior Member ![]() Joined: April-26-2006 Location: United States Status: Offline Points: 402 |
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boat dr,
Care to sell me a shaft? 1978 Ski Tique w/a 220hp 302. Thanks. |
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For every complex problem, there is a solution that is simple, neat, and wrong.
"Where the **** are we?" Amelia Earhart. July 2, 1937 |
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79nautique ![]() Grand Poobah ![]() ![]() Joined: January-27-2004 Location: United States Status: Offline Points: 7872 |
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since your replacing the shaft might as well looking in to replacing the packing gland with a dripless seal as well. Always nice to have a clean water free bilge.
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boat dr ![]() Grand Poobah ![]() ![]() Joined: June-27-2004 Location: United States Status: Offline Points: 4245 |
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Mike , how long and what is the application,fresh or salt water.my '64 shaft i a little longer than std.1.75 in. this allows me to swing a 13 dia. and still mantain the clearace ratio of 10% or 1.3 in.between prop and hull...........boat dr
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duffnit ![]() Senior Member ![]() ![]() Joined: October-12-2005 Location: United States Status: Offline Points: 235 |
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I have a question.
Do they make, or could you get a collar to put on the shaft above the strut so in the event the shaft was to break; a; You wouldn't loose your $350 (+ -) prop? b; Reduce possible rudder and hull damage? I guess there is a reason this isn't done. Perhaps a balance issue....Anyone? d |
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Danny
"no offense- but the rate at which you spread bad information is very impressive" |
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Martinique ![]() Newbie ![]() ![]() Joined: August-11-2006 Location: United States Status: Offline Points: 19 |
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A collar would not have helped me. mine broke about 1" inside the strut
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JoeinNY ![]() Grand Poobah ![]() ![]() Joined: October-19-2005 Location: United States Status: Offline Points: 5697 |
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You can buy a 2-piece egg shaped zinc anode that will bolt on the the shaft at that location. I had one on my 1967 when I got it, the previous owner must have added it because he was storing the boat in salt water, if he hadn't painted over it, it might have been some help. I tossed it since I run in freshwater and hoist the boats at night but it would save the prop in the case of some shaft breaks.
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David F ![]() Platinum Member ![]() Joined: June-11-2004 Location: United States Status: Offline Points: 1770 |
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Yes, such collars exist. They are usually installed just ahead of the packing gland inside the bilge. The purpose is to keep the prop from hitting the rudder if the shaft was to pull out of the coupling while backing hard. As I went with a double taper shaft and thus no chance of the shaft pulling out of the coupling, I did not reinstall the collar. I suppose you could install the collar just ahead of the strut without problem (other than increased water turbulence/drag. You can have my collar if you want it. |
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Martinique ![]() Newbie ![]() ![]() Joined: August-11-2006 Location: United States Status: Offline Points: 19 |
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Is there a tool to help remove the shaft from the coupling? I have the coupling unbolted from the tranny and the set bolts removed but I cannot seam to loosen the shaft from the coupling. any ideas?
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Darrel ![]() Senior Member ![]() Joined: June-16-2004 Location: United States Status: Offline Points: 340 |
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Vice grip and a hammer with a heavy hand. There is a special slide hammer but it isnt cheap and your shaft is already trash.
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