Follow my carb tuning video.  Post back with questions.

https://youtu.be/caIdvC8WGDg

Sounds like the idle/throttle screw (T) is keeping the butterfly open too
far with no throttle applied.  It just so happens that in gear there is
enough load to slow 'er down.  At full throttle is sounds like probably too
much fuel (H).  I think that if it was too little it would die.  Since both
of these "symptoms could be a result of too much low throttle fuel (L) you
should probably start by dialing it back a bit and see how thing go.  By
doing this you will lower the fuel at idle AND lower the fuel a full
throttle.  If you're lucky and my diagnosis is correct then you'll kill too
birds with one stone.

My advice is based on having 3 adjustment screws H (high throttle), L (low
throttle), T (min throttle).  If you're missing any one of these then it
has a jet which serves in its place.

Josh Muckley
S/V Sea Hawk
1989 C&C 37+
Solomons, MD


On Sun, Jun 7, 2020, 09:29 David Risch via CnC-List <cnc-list@cnc-list.com>
wrote:

> So instead of giving it away I rebuilt the carb and half dozen other fixes
> this winter.
>
> Runs and idles great, but at full throttle she bogs down continues to run,
> but sounds rougher.    When out gear it goes right to full throttle.
>
> Perhaps overpropped?
>
> Sent from my Android. Please forgive typos. Thank you.
>
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