[Public-List] Engine performance question

John Boor mahseer at kos.net
Tue Jul 16 06:50:33 PDT 2013


Gord.

I would check for water in the fuel pump and carb bowl.  Drain the bowl
from the bottom plug and look for paticles in fluid if any the carb should
be removed and cleaned.

John Boor

> Hello friends -
>
> Surprise is having a good year racing, and I hope to get away this weekend
> for my first cruising overnighter.
>
> Our Atomic IV, which is otherwise a good girl, has developed an odd
> mannerism.  When starting from cold with the choke on, it fires right up
> but
> stalls after about 20 seconds.  It starts strongly again right away, but
> stalls.  After three or so repetitions of this, it runs weakly, slowly
> gaining strength as it warms up.
>
> When under way, it seems normal when in gear at idle for maneuvering but
> never reaches normal revs when the throttle is opened.  It seems Œweak¹.
>
> Anyone have any idea what is happening?
>
> Gord #426 Surprise
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