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    Recommended prop for OMC 3.0L Model 400 sterndrive?

    I'm replacing a spun Michigan Wheel model #011002 aluminum 13 3/4" dia. x 15" pitch prop. I really need advice on what diameter and pitch as well as brand of prop you all recommend. I always have at least 3 adults on the boat and max at 6 adults and 2 kids. Problem: I want to maximize top speed...
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    What octane does a OMC 3.0L GM engine take?

    Does the OMC 3.0L GM engine take 87 octane or higher? Since I just bought the boat used, and it came with no owner's manual, I need help.
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    Sea Sprite Continental MKIII - Prop pitch range

    I just bought a Sea Sprite Continental MKIII 1985. It has the 140 hp Inline 4 GM/Chevy engine. Does any one have the boat's owner's manual or know what the prop pitch range is? I'd like to use the highest pitch to maximize speed while keeping RPMs low. Thanks in advance for your help!
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