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So, sank my ‘99 Super Sport (long story involving too much ballast and rough water). Anyway, engine not started or turned over until water removed from oil sump. Removed plugs and turned over to expel water from cylinders...not much. Disconnected most electrical connections and sprayed with contact cleaner, including engine computer. Dried with compressed air. Distributor is very corroded under cap, cleaned cap posts and rotor...sprayed with wd40 on inside of distributor.
Engine fired up, but ran rough. Seemed to smooth out a little over time(as engine warmed). Changed oil three times. Lake tested a day later and started right up, but idled rough. Would rev freely in neutral. Got boat up to speed and ran fine at steady throttle..about 25 mph, 3000 rpm or so. Would take large throttle inputs with a bit of hesitation and stumbling. Ran for about 10 minutes at speed. Temp Normal. Brought to idle and engine stumbles and quits. Restart is difficult and engine does not want to idle. Can start with cracked throttle, but quits soon after back to idle. If I get it in gear and attempt to accelerate before it quits, it won’t take the throttle and stumbles bad. Will rev ok in neutral, but not perfectly smooth.
What should I look for next? Or troubleshoot recommendations welcomed. TIA
Engine fired up, but ran rough. Seemed to smooth out a little over time(as engine warmed). Changed oil three times. Lake tested a day later and started right up, but idled rough. Would rev freely in neutral. Got boat up to speed and ran fine at steady throttle..about 25 mph, 3000 rpm or so. Would take large throttle inputs with a bit of hesitation and stumbling. Ran for about 10 minutes at speed. Temp Normal. Brought to idle and engine stumbles and quits. Restart is difficult and engine does not want to idle. Can start with cracked throttle, but quits soon after back to idle. If I get it in gear and attempt to accelerate before it quits, it won’t take the throttle and stumbles bad. Will rev ok in neutral, but not perfectly smooth.
What should I look for next? Or troubleshoot recommendations welcomed. TIA
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