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  1. W

    Need help with yamaha 4.3

    I just purchased a 91 chaparral. It has the yamaha 4.3 vortec. The block is cracked my quess is from not winterizing it correctly. being a first time boat owner I'm not sure what will switch over and what will not. I ran the block numbers and it was a gm block. My question is what motor out of...
  2. W

    HELP. New boater boater yamaha inboard question

    So I just purchased a 91 chaparral it has the 4.3 vortec yamaha motor. The block is cracked and seized. Thoughts on bolting a 350? Questions are what needs to change or should I just find me a 4.3 block?
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