Chainsaw Repair

>Type Code:
>CS = chainsaw, the first two digits describe about the displacement - more than 100cc the first three.
>Saws with 3 or 4-digit model numbers were at times very similar in structure, with the same first three digits in different sales areas at the start.

Yes, I am sometimes mixed up with those model numbers which I can not find on the lists local shop has here.
On the contrary here I have CS-803EVL which number is just well known here at any Echo shop but did not see her on Mike's site neither in other lists on the net. Actually she may sits between the lines below, below CS 750 EVL but above CS 900 EVL.
 
>CS 601T EVL    Boxer Twin                ~ 198?
>CS 611T    Boxer Twin                ~ 198?
------
>CS-660 EVL          64.2    6.5       ~ 198?
>CS 750 EVL          78.6    8.5       ~ 198?
>CS 900 EVL          91.6    9.0       ~ 1981
>

Here is a link to this girl;