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    Mercruiser 454 Magnum Performance Issues

    I am hoping someone can help. I have a 24 ft sports boat fitted with a Mercruiser 454 Mag (carb) 365hp, Bravo 1 leg with 4 blade 24 pitch bravo stainless prop. The boat is reputed to run at 70mph, I am the second owner and not seen anything like that sort of speed. I ran the first season and...
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    Mercruiser 7.4 Magnum down on revs

    Hello everyone, straight in needing some help! My boat is not on song this season, i have a Mercruiser 7.4 Magnum (carb) in a 24 ft sportsboat; 24 pitch four blade prop; cant seem to pull any more than 4200 at wot. This is lower than previous seasons, where do i start? Fuel? Electical? Hoping...
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