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575's bad rap ??

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Old 01-10-2006, 01:36 PM
  #21
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Default Re: 575's bad rap ??

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Originally Posted by 10x
Like Biggus said earlier, a mild hyd roller cam, a touch more static compression, and the 700 hp mark is not out of line. These 575's had just a light clean up on the heads in the bowl area, and a port match. A smaller top pulley that gave 1 more lb of boost, and 709 hp @ 5500, and I believe around 5.3 lbs boost.
Roger, correct me if I'm wrong, I think you've got the dyno sheets.
Frank
I've been holding out on this information. Keeps people thinking how can he get that barge going so fast with mild power. One nice thing is Jeff was able to get that much power out of them without intercoolers. I guess we are lucky that Lake Michigan doesn't get too hot.

The drives are the weak link now but there are options.
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Old 01-10-2006, 09:02 PM
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Default Re: 575's bad rap ??

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Originally Posted by Shah Mat
I have a buddy with the EXACT same issues. Under 200hrs and had rear bearing problems with one of the blowers. I've seen his gas bill, yes those motors like fuel, not to mention going the extra distance to get to a marina that sells 92. And.... he's had XR problems, both sides.
Other than that, it's an awesome boat and the 575's make it "that much nicer".
So whats the issue with XR drives & 575's? and the fix...keep the ass end in the water??
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Old 01-11-2006, 07:11 PM
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Default Re: 575's bad rap ??

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Originally Posted by 382 newbie
So whats the issue with XR drives & 575's? and the fix...keep the ass end in the water??

Here's what happened to mine:

Starboard drive: pinion gear started to chunk out,
vertical drive shaft bearing failed.

Port: pinion seal failed.......a month later, upper
gear set bottom gear chunked out, wedged between
pinion, pushed the pinion forward, breaking the case.

I've heard there was a bad batch of XR gears
.....I must have gotten some

"Out of the water" was not an issue for mine.

I'm blaming it on the "bad batch of gears" and previous owner.

I put 450 hrs on regular bravo's behind HP500's
and never had any issues.
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Old 04-27-2008, 07:49 PM
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What is the height difference between a 502mpi and a 575sci?
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Old 04-27-2008, 08:49 PM
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I had an 02 42 fountain with 575s for 3 seasons. Great set of motors (one of them had a little bit of a personality) but I also had a problem with one of my xr drives. The thing would constantly lose the drive oil over the course of a day.
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