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    alpha 1 shift problem

    Hi all, I've got an '85 Merc 170 with an Alpha 1 outdrive. I spent the day today travelling the Intracoastal Waterway in NC for the first time. <br /><br />Anyway, being unfamiliar with the area, I missed a few buoys marking low areas and narrowly beached several times. In some places I had...
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    replacement tachometer no longer working

    Hi all, need some help with this one:<br /><br />On an '85 Merc 3.7 170, I've been having tachometer problems on and off for two years. A few months back, I replaced the ignition coil (wasn't reading proper voltage at the gauge) and more recently I replaced the tachometer (even with proper...
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    battery drain

    Is there a "rule" for how long the engine must run (at idle or higher rpm) to re-charge the battery from the power lost during starting? <br /><br />If it matters, this is for a 1984 3.7L Mercruiser.<br /><br />I ask because the last time I started the engine, the battery seemed a bit weak. Our...
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    bouncing tachometer

    First trip out this year, and the boat ran well except for one thing: <br /><br />the tachometer bounced wildly between 1000-3000 with no audible change in engine. Can anyone tell me what's going wrong/ what to fix? <br /><br />I've done other searches on these forums and maybe the voltage...
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    water spraying from heat exchanger end cap

    Hopefully someone can help me out here... I'm new to boat ownership and maintenance (but learning oh so quickly). <br /><br />I've got a '84 Mercruiser 3.7L 170HP (I've heard some people call this a 470...I dunno) and I just started it for the first time this Spring. It started fine and I was...
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