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    120hp for 140hp engine swap

    Hi, Since I am new to boating. I was just wondering if there are any issues with switching from a 120hp to a 140 hp mercruiser??? Do you have to change any of the outdrive componants??? How much can I expect this to increase my speed??? The boat is rated for 140hp max. Al
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    Cooling system question

    I have a 120hp mercruiser. Fresh water cooling. I have read that removing the thermastat can damage the motor. Is this true????
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