Are you picking up the injector pulse like Tracy's schematic shows for
use with the EM2? There should be one injector pulse per revolution for
any one primary injector just like the 13B.

Bob W.


On Sun, 14 Jan 2007 11:19:17 -0800 (PST)
lou rubin <grdflyguy@yahoo.com> wrote:

> What tach would be compatable with a 20 B ?We were
> using the blue mountain for engine speed ,however the
> unit had to be on for the engine to run smoothly. Im
> wondering if the 20B would be a different pulse rate
> then the 13B
>
> Lou
>
>
>  
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