My Serial number for my 9 and 1/2 hp Evinrude motor is D51405792. Trying to figure out the value and year of this motor thanks

There is a model 60452 listed under 60hp, 1964year. Not sure what the S means, but in the 60's they were 2 cycle. I don't think 4 cycle came out until the 80's. Evinrude Outboard Motor Model Numbers

Bruce,
Do you have the serial number of the motor? Reason I ask is twofold. Evinrude started using this model number layout as of 1980. Having said this, something is not making sense with the location of the "N" in your model number. Those last two letters as of 1980 are the year. Here is the chart. Letter on top with corresponding year below it.

I N T R O D U C E S
1 2 3 4 5 6 7 8 9 0

So... Example
1980= CS
1990= ES
2000= SS
2010= IS

You have E8RLNR which breaks down as:
E= Evinrude
8= 8hp
R= Rope start tiller steering
L= 20" shaft
N= 2nd year
R= 4th year

I would expect to see the N in the last spot:
1982= CN
1992= EN
etc.

Serial number is another way to identify the year.
This may hep point you in the right direction. Hope it helps.

marineengine.com/parts/engine-model-guides/omc-johnson-evinrude-model-number-guide/omc-johnson-evinrude-model-number-guide-00004.html

Regards,
Fred

Rob, AQABVA71K899 does not seem to come up as a valid # for referencing engine. Check the attached links,instruction and guides, Good luck
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Outboard Engine Serial Number Year Match up
Evinrude Outboard Motor Model Numbers
EVINRUDE OUTBOARD MOTOR MODEL YEAR LOOKUP GUIDE 1913 1979 MASTERTECH MARINE

To get the year of Johnson and Evinrude outboards use the word "INTRODUCES". Each letter corresponds to "1234567890" respectfully. It's best to check with a model year reference book, but this motor's model number contains "CC" which would indicate it's a '88.

Hello,

To have the year of your engine, we'll need the engine typenumber, not the serial number...

An evinrude dealer may be able to help you

1978 It is in the model on an Evinrude. 6804.... 6 HP.....1978

The Manual Store also has some useful boat motor model year lookup data:
Boat Motor Model Year Lookup Guide