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Prop RPM VS. Engine RPM?

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Old 08-07-2002, 08:15 PM
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Default Prop RPM VS. Engine RPM?

Hey guys when a engine is turning a certain number or RPMs say 6000, does that mean that the propshaft is also turning 6k
I hear people talking about changing gear ratios in outdrives.
Is this to increase or decrease the number of RPMs the propshaft is spinning compared to the engine?
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Old 08-07-2002, 08:22 PM
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To decrease propshaft speed. Ratios can be 1:1, 1.12:1, 1.25:1, 1.36:1, 1.5:1, 1.65:1.
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Old 08-07-2002, 08:39 PM
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Most stock Bravo drives are 1.5:1 ratio. That means that the engine turns 1.5 times to the prop shafts 1.
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Old 08-08-2002, 06:41 AM
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Thanks guys, do any of you know what the ratio on a stock 330TRS is?
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Old 08-08-2002, 06:50 AM
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1.5
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