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    New rebuilt 502 installed and lacking power-Help!

    Hi Guys. I'm hoping you guys can give me some advice on where to start. First some background info. I purchased a 1994 21' Islander. It originally came with a 502 Merc. Prior to me purchasing it the 502 was removed and a 7.4 L carburated merc was installed. Over the last few years I had been...
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    Coil issue-Boat shutting down

    First off. Hello to everyone and thanks in advance for any help you may be able to offer. I recently took my 1994 21' Baja boat into a shop to get my 502 removed and re-installed after a fresh rebuild. I believe the electronics are likely a Thunderbolt V ignition system. The boat was running...
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