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Bravo gears are known to be junk. They're always going away. I know with 700hp as I am also even if your easy on the sticks those drives are at/over their limit. If you got 3 seasons out of them I'd say your lucky. Usually starts out as fir on the magnets, hardened surface wearing, time to watch them closely. Then it progresses to flakes, hardening is gone and gear surface is going away. Next is chunks and you waited too long. Expensive enough to replace gears. If you destroy a tower or housing when it blows it's alot more cash to fix or replace. I wouldn't wait until it pops. My 2ct's.
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I would do it now as opposed to the spring... offseason is thetime to fix stuff, not waiting for it to get fixed when the suns out and your standing on the dock wishing it was done already.
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The lower Merc pinion gear tests at rockwell 48-52. The driven gear tests at 56-59. After 5hrs of running I have seen the pinion gear start to disenegrate and the driven looks new. Why the pinion gear is so soft, is a mystery to me. They build them and sell them by the truck load.... like fire said.. JUNK!
The Imco SCX gears are much harder and last ten times longer. Dick |
Sounds like a market to make some money to me, reverse engineer some gears with a harder rockwell and your in business.
we use PRO (softer) gears in drag racing so they bend instead of break. they absorb more shock this way. they dont last long though maybe one season if your lucky. They tend not to shatter though like regular hardened gearsets. |
Originally Posted by Rebel_Heart
(Post 3234340)
Really appreciate the replies. Mr. Gadget, you set these up 3 years ago and have been worry free, until now. He said there were more than the traditional metal flakes, more like chunks and that it would continue until until it caused more damage. I do trust the guy, but wanted to get opinions on what might be the worst case. It will really bother me to think about this until spring.
WORST CASE the gears shatter tetch get caught in the gearset and spread the case breaking the entire housing and your buying a whole new unit. Plus paying sea tow to get you home.:eek: |
Best to get it fixed in advance of a major failure. Like split case or tower from gear teeth hitting the inside walls. Then the only parts to salvage will be........nothing.
cheaper now, much more expensive later. Plus better to get it done in the off season. |
Originally Posted by Mr Gadgets
(Post 3234410)
The lower Merc pinion gear tests at rockwell 48-52. The driven gear tests at 56-59. After 5hrs of running I have seen the pinion gear start to disenegrate and the driven looks new. Why the pinion gear is so soft, is a mystery to me. They build them and sell them by the truck load.... like fire said.. JUNK!
The Imco SCX gears are much harder and last ten times longer. Dick Will the Imco gears go in the Merc XR case? |
Originally Posted by RaggedEdge
(Post 3235773)
Will the Imco gears go in the Merc XR case?
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That is correct, they are too large. Too bad they dont fit. Lots of people have tried to reverse engineer them but the cost is high and not an easy task.
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Originally Posted by Mr Gadgets
(Post 3234410)
The lower Merc pinion gear tests at rockwell 48-52. The driven gear tests at 56-59. After 5hrs of running I have seen the pinion gear start to disenegrate and the driven looks new. Why the pinion gear is so soft, is a mystery to me. They build them and sell them by the truck load.... like fire said.. JUNK!
The Imco SCX gears are much harder and last ten times longer. Dick Does anyone know what grade tool steel these are made from? I figured it would be 4140/brake die. |
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