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Recent content by JasonMa

  1. J

    Mercury thunderbolt 50hp no spark on top two cylinders

    Hello. I'm very new to boating and even newer to mechanical repair, but I'd like to try to repair my motor. My motor looks to be 77 (serial number 4360108). It starts up fine and runs, but will only idle with the high speed idler lever up. When I put it in reverse, it runs and the rpm's go up...
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