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Bent shaft


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Adrenalyze
Posted (edited)

I have a question. I just bought a 2020, 23 lsv. This is my first endeavor into a v drive boat. After about 15 hours of use I started getting a horrible knocking noise from under the boat. I took it to a wake shop and the drive shaft is bent. Bent right where it comes out of boat. That’s where the knock was. Everyone is telling me I hit something. I’m 100% certain I didn’t hit anything. 1 blade on the propeller isn’t perfect. From the previous owner. My question is. Could I have bent the driveshaft from torque? When it started knocking we were in roughly 25’ water surfing. I was playing with the surfgate and wave. With the load we had in the boat etc. When the surfgate was up too high we struggled to maintain cruising speed. I think it was under a lot of torque at this time. After surfer washed out. The next surfer I noticed the knocking noise. In my mind this should be a warranty thing.  
 

Edited by Adrenalyze
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Nick55

A prop shaft won’t bend from engine torque.  Without pictures and shaft runout measurements, it’s hard to know what happened but it’s possible you hit a good sized log right at the shaft when the boat was nose up during surfing. 

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Adrenalyze

Bent shaft was the initial observation without tearing into the boat. Turns out 6 of 8 bolts were sheared in the v drive. Not a good start into my v drive boating experience. (Boat has less than 180 hours)

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2 hours ago, Adrenalyze said:

Bent shaft was the initial observation without tearing into the boat. Turns out 6 of 8 bolts were sheared in the v drive. Not a good start into my v drive boating experience. (Boat has less than 180 hours)

That will give you a vibration too.  I think I’d reinstall new bolts, and recheck your shaft runout.  

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