khadley

i did the exact same thing cruising 3500 hit a cruiser wave landed and the drive was broke it was a pain trying to get the broken part out of the drive

imco 2" shortened vertical shaft

i am going to replace the other shaft in the other drive too

Wobble

Strip,

I had a similar breakage a couple of years ago, a bearing went bad in the lower housing on the output shaft and tightened up.

Did your drive bottle blow fluid out?

Best we could figure was that I hit something with outdrive. Though I wasn't aware of it. Had been cruising all day at about 3000rpm with baby on board.

ofshore

That sucks!!

The reason it breaks there is because of the undercut to allow the bearings to seat on the center lip, it creates a high stress point.

If you don't mind me asking what do the aftermarket shafts go for? There's no reason why a better alloy couldn't be used for higher load applications unless it prices them out of the market.

Rik

Rob, I know of a cure for your problem.

Jassman

I have been telling him the same thing for years

Strip Poker 388

iTrader: (6)

Yea it looks like they should put a radius there ,not the 90 angle . I had never broken one there before .seen to be a regular spot?

I don't mine parts failure that much,I am use to that hot rodding stuff but if its a bad part or human error thats not acceptable

Don't know what its going to cost . should know Friday


Yea I hear ya Rik and Jeff.but the $$$$

Thanks

Rob

ofshore

And if it's a poorly designed part the manufacturer should fix it

We have a automotive test lab where I work so we get to break parts all the time to see what their limits are, which is pretty fun when your not paying for it

Anyway, we had a 1" diameter shaft made out of some special alloy that we decided to see what kind of torque it would take so we put it on a hydraulic actuator and wound it up until it broke at around 4,000 ft/lbs .

I don't know what diameter the shaft is that you broke, but i'm guessing the engines wouldn't be capable of breaking this 1" shaft at 4k ft/lbs.

Strip Poker 388

iTrader: (6)

There saying thats a normal spot where they fail .The drive is 3 years old and had about 15 hours with the new blower motors .They said the Normal cause is shock not torque. Jumping it out of the water .When ya heat treat them it only goes so deep and it still soft in the center the reason for the different color on the inside . The new one is made of 4340cm and has a large radius now.I should be good now . I will be back on the water this weekend .

Thank you Dean at the Bravo Shop .He received it this morning and rebuilt it today and Ill have it tomarrow .Now that some fast service!!!

Lets see what else I can tear up


Rob

dykstra

iTrader: (1)

My damage this weekend! Lost the prop and shaft somewhere in the water.

Rik

$$?? Put a price on the 4th of July Weekend and that two hour idle back.