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Old 07-11-2005, 03:08 AM   #1
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T-850 motors?

Can anyone tell me what motors are legal in T-850? Do they have to meet current UIM homologation?
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Old 07-11-2005, 11:25 AM   #2
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Welcome to Boatmad Mark.
I can't answer your question, but I'm sure sommeone here will!
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Old 07-11-2005, 05:43 PM   #3
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According to carr mill powerboat club, minimum lenght 4.25 metres, minimum weight 250kg, engine yamaha 850 cc , 70hp with a speed of 70mph.
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Old 07-11-2005, 06:01 PM   #4
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Mark, Yes it's the Yamaha racing 70CES short shaft, the same used in S850/F4. Every motor used in Euro Class racing has to meet UIM specs/homologation.
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Old 08-11-2005, 12:40 AM   #5
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Thank you gentlemen. Some has been asking about running a Merc 650xs or 700x in T-850, but I suspected those motors were no longer allowed because they have been out of production for more than 10 years and parts have not been available for a very long time.
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