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  1. S

    building a mini speedboat

    I am modifying the transom to possibly take twin 9.9 engines. the entire deck will be redone by me in aluminum
  2. S

    building a mini speedboat

    I'm making a mini speedboat/fishing vessel as a fun project and want to build in a center console with steering wheel, seat and throttle. It is an Avon rover r2.80 with an evinrude 9.9 (shaft rated), inflatable keel, and electric trolling motor. I am also going to install fishing pole holders...
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    Avon Rover R2.80 SIB with evinrude 9.9. Will I Fly?

    I just got my hands on a 1974 Evinrude 9.9 that I have retrofitted the later CDI ignition system onto. I also have the tuned exhaust and different carb from the later model as well. I got the boat to plane at around 18 knots on a perfectly calm lake with my evinrude 7.5 (roughly 6hp at the prop)...
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    9.9 powerhead on a 7.5 chassis?

    evinrude did make a super10 that I read was the 9.9 powerhead on the 7.5 chassis. I couldn't find much more info on it
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    9.9 powerhead on a 7.5 chassis?

    I recently got my hands on a johnson 9.9 powerhead from the late 1980s. my current outboard is a 1982 evinrude 7.5. the bolt pattern on both motors is the same, so I am wondering if I can fit the 9.9 powerhead to the 7.5 chassis to get a boost in power without adding a lot of weight. the boat...
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