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Old 09-24-2007, 03:58 PM
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Default trs gear ratio
Throttle up is trying to help me calculate prop slip on my 88 formula 311. Boat has merc 420's with velvet drives and trs outdrives. What is my gear ratio? I'm running 68.3 mph at 5200 rpm with 23 pitch mirage props. Any help would be appreciated, Julie is not familiar with the 420 setup. Thanks guys
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Old 09-24-2007, 04:22 PM
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1.50
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Old 09-24-2007, 05:47 PM
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thank you, just curious how i can confirm this, it's gotta be on the drive somewhere....???? right?
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Old 09-24-2007, 06:46 PM
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Originally Posted by 454captiva
thank you, just curious how i can confirm this, it's gotta be on the drive somewhere....???? right?
1.50:1 was the only ratio for the TRS
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