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  1. B

    charging???

    not sure if my '87 90HP 3 cyl Mercury is charging. <br /><br />Voltage measured at rectifier is only 12.8 volts at 2500RPM. 12.5 at idle 800RPM.<br /><br />Because the rectifier output goes directly to the battery the battery acts like a regulator<br />(electrical sponge) and may be keeping the...
  2. B

    year of 90 mercury needed, still...

    thanx to all who replied. Still don't know year unfortunately.<br /><br />site with sn listings did not include my engine (3 cyl 90HP with sn of B153951)<br /><br />interesting site however!<br /><br />guessing it is a early model 87 because that year had some sn's starting with B.<br /><br...
  3. B

    mercury 90hp, what year?

    posted this already but can't find any response so asking again. trying to find year of this engine, sn 0B153951.<br /><br />Any help appreciated
  4. B

    Mercury year????

    got a new (used) mercury and don't know the year. Can anyone please help?<br /><br />sn 0b153951<br /><br />mn 3984z8<br /><br />Thanks,
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