Thread: Engine: 140 1986cc B20A: - Rough Idle solution?
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Old Aug 2nd, 2021, 17:34   #20
bdhurley
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Last Online: Apr 21st, 2024 19:34
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Quote:
Originally Posted by c1800 View Post
It appears that 10 deg timing is for B20B, and 21-23 deg is for the B20A.

https://www.volvoclub.org.uk/manuals...ualOct1970.pdf

https://volvo1800pictures.com/docume..._B20A_B20B.pdf
It must be a missprint on my '72 volvo service manual green book. The Haynes manual also says 14 deg @ 600-800 rpm (which would be close to 21-23 @ 1500rpm as in the owners manual)

I also found a service bulletin 20-16 issued in '74 for timing adjustments for the different octane ratings of the day. There is some interesting documents on this webpage with the help of google translate from Swedish.
http://www.240.se/litteratur/sm20-16.pdf
http://www.240.se/

Last edited by bdhurley; Aug 2nd, 2021 at 17:45.
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