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    1990 Mercruiser 454 freshwater cooled 330hp

    I went ahead and had new longblocks installed last year, did the 10 hour break-in and had them adjusted and checked. Now with 16 hours on them one of the holes in the port engine is not getting oil to the push rod (only a little spurt now and then). Had a new push rod assembly and lifter...
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    MerCruiser inboard RPM fluctuation problem

    I have twin MerCruiser 1990 7.4 liter (340hp)freshwater cooled inboards (carbs, V-drive, Borg-Warner transmissions, rack-and-pinion steering)<br /><br />At the end of last season the port engine developed a habit of changing its RPM setting to higher or lower speeds at random, on its own. This...
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