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  1. S

    Thunderbolt IV

    I am running 4.3 v6 mercruiser with a thunderblot IV ignition system. The engine starts and runs great. It is timed 8 degrees before top dead center. Brand new rochester carb. Brand new fuel pump. Separate battery and wiring to accessories controlled by a blue sea battery switch. No water in...
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    No RPM'S 4.3l 1988 thunderbolt IV

    My original post is below with only a few replies. I have since put a shop tach. on the engine. Set my idle speed RPM's at 650-700. Engine is timed at 8 degrees BTDC. When i give the engine throttle and look at my timing marks with the timing gun it looks like the indicator (light mark) on the...
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    1988 sea ray wont plane, power surge when activating trim tabs or cigarette lighter

    My 1988 21' sea ray seville mc with a 4.3l v6 4bbl rochester carb starts and runs great. Shifts in FWD and Reverse no problem. When i get out on the lake and go WOT the engine dies down (flooding) smell gas behind the boat. If i push my trim tab buttons or move the outdrive up or down or even...
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