New Product - Idle adjusting needle with knurled extension - late model

[Don Moyer]

Idle adjusting needle with knurled extension - late model

This needle valve is made of stainless steel and has a knurled extension to make adjusting the idle fuel mixture a "no-tool" procedure. It is recommended in any application where access to the idle mixture control on top of the carburetor makes adjusting the idle mixture with a screwdriver difficult.

Special thanks to Forum Senior Member T. Enders for the idea, originally posted here in the Wish List category on the Forum.

Don

[Baltimore Sailor]

That looks sweet!

Is replacement a simple matter of just backing out the old screw and putting this one in, or are there springs 'n' stuff to look out for? I just bought a new carb last season, and I am the target customer for this item.

Thanks for getting this out!

[Don Moyer]

Yep, you simply unscrew the old one and screw in the new one. Be careful not to drop the spring into the bilge.

Don

[blackdove]

How many turns?

I just installed a new carb and adjusting screw from Don's shop. I didn't count the number of rotations when I unscrewed the "old" screw on the new carb so I'm at a loss as to how many turns this should have. Thoughts or suggestions. Thank you.

blackdove

[roadnsky]

I just installed a new carb and adjusting screw from Don's shop. I didn't count the number of rotations when I unscrewed the "old" screw on the new carb so I'm at a loss as to how many turns this should have. Thoughts or suggestions. Thank you.

blackdove

Start by turning it all the way in to the seat and then back it out about one and a half turns.
From that point, once the engine is WARM...
Simply turn the idle mixture IN (Clockwise) until the engine is running too rich, then back it out a 1/4 turn at a time until a smooth idle is reached.
Wait about a minute or two for each 1/4 turn to have an effect.

[blackdove]

Thank you.

Hi Jerry,

Thanks for the response...I'll bet you just saved me about three/four hours of excruciating experimentation.

blackdove

[roadnsky]

Thanks for the response...I'll bet you just saved me about three/four hours of excruciating experimentation.

Weeelll, let's just hope...

[David Masury]

A simple trick to keep the adjustment screw from turning over a period of time due to vibration is to use a star washer ( both internal and external teeth ) they cost only a few cents and when placved between the spring and the knob end or at bopth ends of the spring they prevent turning and yet iot does not interfer with your adjustments.