Drifting air fuel adjustment
Posted by Larry Reber On 2024/7/11 13:46:52
OK, so here’s the story.
37 Packard 115 C.
Stock carburetor.
I have a constant issue with the air fuel idle mixture screw drifting. This causes over fuel condition, rough running, etc.
In the picture was my fix.
Does anyone have other suggestions on how to keep the needle valve screw from adjusting out.
This usually happens after I’ve driven the car and parked it and let it cool down.
The car started right up at the garage. Ran great until I got about 2 miles from our dinner stop..
When I parked I turned the screw about an eighth of a turn, maybe like a 16th into the lean and the car idle right out.
It ran ok back to the house and then t turned about 1/8 turn lean and it smoothed out , better than the parking lot adjustment.
Thanks
Attach file:
IMG_2544.jpeg (2,332.41 KB)
IMG_2545.jpeg (4,286.95 KB)
37 Packard 115 C.
Stock carburetor.
I have a constant issue with the air fuel idle mixture screw drifting. This causes over fuel condition, rough running, etc.
In the picture was my fix.
Does anyone have other suggestions on how to keep the needle valve screw from adjusting out.
This usually happens after I’ve driven the car and parked it and let it cool down.
The car started right up at the garage. Ran great until I got about 2 miles from our dinner stop..
When I parked I turned the screw about an eighth of a turn, maybe like a 16th into the lean and the car idle right out.
It ran ok back to the house and then t turned about 1/8 turn lean and it smoothed out , better than the parking lot adjustment.
Thanks
Attach file:
IMG_2544.jpeg (2,332.41 KB)
IMG_2545.jpeg (4,286.95 KB)
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