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    Mercruiser 3.0L/3.0LX Sparkplugs

    Trying to tune up my 3.0LX before putting her in cold storage and have come across a spark plug dilemna. Manual shows very different plugs for these two engines, although they are virtually the same engine.<br /><br />One of the plugs is almost three times as long (inserted thread length) than...
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    Mercruiser Electronic Timing Advance Problem

    Bewildered by 1991 Mercruiser 3.0LX with Alpha 1 I/O unit. Has EST ignition system which stopped advancing one hot summer day. To get home, I set the advance manually by twisting the distributor. Engine ran fine at top end, but of course was hard to start.<br /><br />Replaced every component...
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