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Why do boats break?

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Old 07-30-2009, 09:56 PM
  #31
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Originally Posted by isellpower View Post
I realize that boats use Chevy, Ford, Dodge (Ilmor) engines, but boats themselves are built by tiny companies in comparison to cars. What do you suppose the price and reliability of boats would be if Honda, Toyota, Ford, etc, built boats? I suppose maint and breakage would be decreased dramatically. Just imagine the engineering budget Toyota would have for drives. F1 cars run at constant super high RPM's with big hp and small cu's and they do not break nearly as often as the high hp race boats. Just my 2 rupes.
And if you had a $500mm/year budget nothing would ever break....that's about what the top F1 teams spend.

Most boats are pretty reliable....high performance boats, just by the sheer nature of what they do (go fast) is a recipe for broken parts. Especially when they are run in big water. The physics of pushing something that big and heavy, at 80+ mph through the water is enormous and requires constant attention to the mechanicals and frequent service intervals. Kind of like how top fuel dragsters basically rebuild the motor after every 1/4 mie pass.
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Old 07-31-2009, 01:57 AM
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"You gotta pay to play" - a mechanic once said that to me after I was shocked at how much it took to replace something simple.

Anyways, think about it this way, if you were in the water most your life, I'm sure you would break much faster than being on dry-land all the time.


Totally unrelated but watch the movie waterworld to get a grasp of global warming to the max and being on a boat ALL day.
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Old 08-02-2009, 08:38 PM
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Originally Posted by isellpower View Post
I realize that boats use Chevy, Ford, Dodge (Ilmor) engines, but boats themselves are built by tiny companies in comparison to cars. What do you suppose the price and reliability of boats would be if Honda, Toyota, Ford, etc, built boats? I suppose maint and breakage would be decreased dramatically. Just imagine the engineering budget Toyota would have for drives. F1 cars run at constant super high RPM's with big hp and small cu's and they do not break nearly as often as the high hp race boats. Just my 2 rupes.
Take any of them cars, run up about 4000 rpm and drive it over three foot speed bumps and see how long it lasts.
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Old 08-03-2009, 12:54 AM
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Take any of them cars, run up about 4000 rpm and drive it over three foot speed bumps and see how long it lasts.
Just tryed it, stuff broke... alot of stuff
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Old 08-03-2009, 02:40 AM
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F1 cars run at constant super high RPM's with big hp and small cu's and they do not break nearly as often as the high hp race boats. Just my 2 rupes.
F1 engines make almost NO torque. High hp for their size but they don't need torque. Boats run on torque.

Torque and shock loading kills stern drives. Put an F1 car tranny in a boat and be lucky to get on plane first try but I doubt it.

There are drives that don't break (Arneson, Twin Disc, etc). A boat is one GIANT compromise. It operates in an abusive environment right out of the gate. However...

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Old 08-03-2009, 03:11 AM
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OK, so I just ordered 2 GM marine 502 longblocks (factory) from Derebery performance. They are new,factory GM built units. Do I need to do a teardown and tech inspection (verify proper clearances) Although these are supposedly marine standard engines, they dont have inconel ex valves. I thought that was one of the standards on marine engines. Any advice?
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Old 08-03-2009, 07:48 AM
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Originally Posted by GO4BROKE View Post
Toyota did a marine engine for a couple years. It was in ski boats I think. It sucked, over complicated and broke a lot.
They did, the boat were called Epic and they were inboard tournament ski boats. The boats were actually very nice and at the time were competing with industry leaders like MasterCraft, Nautiques, and Malibu. One downfall was that no one was real keen on the Lexus overhead cam V8. The demise of the line was the fact that Toyota is a very smart company, and they soon realized that selling niche boats in the high-end ski boat market wasn't the most prudent business decision.

The Epic name has been ressurected under a new company out of CA.
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Old 08-03-2009, 08:54 AM
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Anyhting that goes fast and gets beat breaks, nature of the beast...
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Old 08-03-2009, 09:35 AM
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Toyota did a marine engine for a couple years. It was in ski boats I think. It sucked, over complicated and broke a lot.

Isn't he from Kenya, too?
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Old 08-03-2009, 10:53 AM
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Originally Posted by sandcraft View Post
OK, so I just ordered 2 GM marine 502 longblocks (factory) from Derebery performance. They are new,factory GM built units. Do I need to do a teardown and tech inspection (verify proper clearances) Although these are supposedly marine standard engines, they dont have inconel ex valves. I thought that was one of the standards on marine engines. Any advice?
Didin't he give you a waranty for those???
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