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75 hp big enough?

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  • 75 hp big enough?

    i'm planning to get rid of my inboard motor this fall and redo my transom for an outboard. its a 19.5 fiberglass. i recently saw a 75 hp 2010 etec on sale and was wondering if that motor would move my boat at any type of speed. don't need to be real fast, just up on plane maybe 30 km/hr. any opinions?
    1978 Grew 194 with Merc 165 inline6, MC1 drive

  • #2
    I've found the calculator linked below to be pretty accurate. That's a pretty heavy boat for 75hp but it's possible it'd do 30kph/19mph.

    https://btb.fishing/boat-horsepower-calculator/
    1972 Starcraft Holiday 21' w/2008 Yamaha F90

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    • #3
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      It should push you between 24 - 28 mph(38 - 44 km)

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