What year is my 90 merc

A

Ardnek

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Mar 12, 2006
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Hi All:<br /> I am new to this site and need some help.I purchased a used 90 HP mercury outboard. the only numbers that I found were '08300908', and I was hoping someone out there coud either tell me what year it is or direct me to a site where I could find it. Thanks for any help anyone can give me.<br />Ardnek
 
AMD Rules

AMD Rules

Lieutenant Commander
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Sep 23, 2004
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1,707
Re: What year is my 90 merc

Ardnek,<br /><br />Second digit is a "B"<br /><br />Serial Number: 0B300908 Model Number: 1090412BD<br /><br />1988 3cyl 90HP<br /><br />Hope this helps.
 
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Pogo123

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Jun 7, 2005
Messages
177
Re: What year is my 90 merc

O.K., Amd ... but where did you find the model/serial crossover charts? <br /><br />I just came into a Mercury 20HP this afternoon that I can't determine the year either ... unlike most others, there's no year on the ID plate ... just a serial 5765 766.<br /><br />The engine looks as though it's barely had any use and starts on the first pull, but, so far, all I can locate is a range from 81 through 88 and, looking at the engine, I find that hard to believe.
 
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AMD Rules

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Re: What year is my 90 merc

According to the serial number, that is a 1980/1981 20hp motor. Mercury would refer to it as a 1980 motor, although it may have been built in 1981.<br /><br />To find out the model number I use mercurypartsexpress.com, but it only works for newer motors.<br /><br />As for the serial/year cross reference there are quite a few sites that post the documents. One I had used before would be maxrules.com for example.
 
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Pogo123

Petty Officer 2nd Class
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Jun 7, 2005
Messages
177
Re: What year is my 90 merc

Thanks here too, AMD ... The MasterTech site is very interesting and chock full of information. I shoulda known about him before I rebuilt an old (1941) Johnson that had been in the family since 1946.<br /><br />Mercury parts express doesn't like my 7 digit model number ... says it wants 8 and no matter where I put a zero, it spits up, probably, as you say, because of the age. But ... you've given me a good lead and I appreciate it ...
 
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