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    shell nitrogen enriched fuel causing problems?

    I have used shell nitrogen enriched fuel in my 5.0 mercruiser and my 3.0 both are alpha ones. After using these fuels I have had problems starting both engines. Is this coincidence or should i stay away from that fuel.
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    is it a 5.8 or 7.5?

    I know this is probably a dumb question but I just got an 1989 bayliner 2455 and it is supposed to have an cobra omc 5.8. But looking at the spot where the carb was it has four holes all the same size. And the clymer omc book shows that to be the 7.5 . How can I tell the diff.thanks
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    about to buy 1990 2455 bayliner with 5.8 omc. what to look for

    im about to buy a 1990 bayliner 2455 with 5.8 omc what should i look for on these . im paying 1500 for it . it is a project. owner says freeze plugs were removed to prezent freezing? is this normal.
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    replace mercruiser 5.0 alpha one with king cobra v8

    I have 1991 bayliner alpha one 5.0 that has cracked everything. And I also have an omc king cobra v8 1988 that is in good shape. Van I remove the mercruiser motor and replace it with the omc cobra. I will replace out drive and everything.
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    alpha one 5.0 wont start

    i have replaced slave solinoid and spark plugs . engine turns over but just as it is about to start a small puff of "smoke" comes up from under the under head gasket area. i am hoping it is just a gasket problem and not cracked block. any ideas?
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