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Low hour Bravo XR blows after on propshaft dyno

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Low hour Bravo XR blows after on propshaft dyno

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Old 08-04-2020, 10:41 AM
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Is it feasible the resistance was in the failing drive until the engine built enough power to overwhelm it?
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Old 08-04-2020, 10:53 AM
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Originally Posted by Baja Rooster
Is it feasible the resistance was in the failing drive until the engine built enough power to overwhelm it?
Hmmm, that’s a thought, but I’ve been trying to address this issue since I bought the boat in March of this year. The drive fluid showed no signs of trouble and no signs of metal during the past few months.
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Old 08-04-2020, 11:24 AM
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what is the boat ?
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Old 08-04-2020, 12:10 PM
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Originally Posted by F-2 Speedy
what is the boat ?
rare 2001 Formula 292 with a single engine. Built for class 5 racing, no cabin interior, built light.
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Old 08-04-2020, 12:12 PM
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But, the boat was never raced, kinda been converted to a performance pleasure boat since it was new.
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Old 08-04-2020, 12:29 PM
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200 hrs on XR gears is a pretty average lifespan. Most of the time its the upper gears that let go though
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Old 08-04-2020, 01:11 PM
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So what is recommended here? Upper gear inspection/ replace the upper gears and also replace the complete lower assembly?
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Old 08-04-2020, 01:36 PM
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Go with XZ gears in the upper. They will last alot longer. Full rebuild on lower as well.
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Old 08-04-2020, 02:00 PM
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Originally Posted by Drock78
Go with XZ gears in the upper. They will last alot longer. Full rebuild on lower as well.
Yeah, especially since the OP said its a light layup. Makes sense.
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Old 08-04-2020, 02:14 PM
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Originally Posted by Drock78
Lol. Was driving and missed that part.

Usually it's the gears that fail but anything is possible I suppose. I'm thinking it may be the prop if you changed and spun the other with no problem.
just bustin ur ballz
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