How do I figure out the year/model of this Evinrude motor?

[DC Crappie Kid]

I have recently acquired an 9.9 hp Evinrude with a boat I purchased. The guy said it was a mid-'70s model. The problem is the ID plate has a big gouge in the model #. The Serial Number is clear. I'm having trouble getting it to start, and I'm afraid I'm going to need parts. Problem is, I don't know what model it is. Any way I can get the Model number using my Serial number? Any help would be appreciated!

[Barnacle Bill]

Does any of this help? If not you will have to call the dealer with the serial no. Looks like the 3rd digit is the year.

Evinrude 9.9 HP Motor
Year Model
1974 10424
10425
10454
10455
1975 10524
10525
10554
10555
1976 10624
10625
10654
10655
1977 10724
10725
10754
10755
1978 10824
10825
10835
10854
10855
1979 10924
10925
10935
10954
10955

[Barnacle Bill]

Also look on top of the motor for a round welsh plug. It may be stamped in it.

[DC Crappie Kid]

Also look on top of the motor for a round welsh plug. It may be stamped in it.

This sounds like what I might have to do. Only problem is I have no idea what a "welsh plug" is, or where to find it. Any ideas?

[grizzlysteve]

you could also look at the diagrams on this website (link below) and try to match it up by appearance compared to yours, the section on "motor covers" is where i'd start.good luck. may take a while but if your numbers are gone it may be your best shot.
Evinrude Johnson Outboard Motor Parts Catalog

[luvjign]

See if this helps, CK. How can I find out what the model numbers on my Johnson Evinrude outboard mean? omc id here Click the highlighted prompt (towards the top in red) for pre-1980 motors.

[LBM]

This sounds like what I might have to do. Only problem is I have no idea what a "welsh plug" is, or where to find it. Any ideas?

I didn't know either but this is what I found.
WikiAnswers - What is welsh plug

[Barnacle Bill]

I didn't know either but this is what I found.
WikiAnswers - What is welsh plug

Yep. thats it.

[DC Crappie Kid]

Thanks guys. Took me forever to find the plug, but I found it. No numbers on it! But thanks to the list LUVJIGN posted, I've been able to take the numbers I can make out between the scratches and use them to narrow it down to 10 possible matches. Unfortunately, each of those 10 possibilities are from 10 different years ('80-89). And from the look of the motor, I doubt it's any newer than an '85, so I think I'm looking at an '80-'84. And since the guy told me he thought it was a '74, I'm wondering if it might be an '84? I have the SERIAL #, so if I could just find some way to use that to determine the model # I would be in good shape. Guess I'll have to call a dealer after all.

[jaxsprat]

On the old evinrude's I had if I remember right the serial # was made up of at least 3 things, year, Hp, & a serial number meaning motor 1 or 1001 etc. post a pict of motor I bet there's folks here that had same one.