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    1971 merc 7.5 Thunderbolt wont bogging at high throttle in forward only..

    Hello all, new here so bear with me... I picked up a 14 ft aluminum v hull, has a 7.5 merc. thunderbolt, 1971 model. I took it out for a run to the local lake to check out the performance today. starts great , easy. Felt a bit underpowered for what i was expecting. when i would rev the throttle...
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