Electric choke in sub freezing temperatures

[FMS88]

Before you start it, open the throttle about 50% and release it. Check that the fast idle cam has rotated enough that the throttle lever contacts the cam near the end of the cam as circled in this picture:

Cam-Lever Contact.jpg

If it's not at the third notch or beyond as in the pic, thoroughly clean the cam linkage and lube it with a light oil.

Fast Idle Linkage.jpg

The spring for the cam is quite fine, so dirt and grime can cause it to unwind slowly. When operating properly the cam, its linkage and the choke valve should move freely and snap into position when the throttle is opened quickly.

If the lever-cam contact is correct and the linkage fine, check the delay valve and its vacuum hose on the valve cover side of the carb. With a hand pump, the vacuum should leak down slowly - about 1" Hg per second.

[MrPaco]

Before you start it, open the throttle about 50% and release it. Check that the fast idle cam has rotated enough that the throttle lever contacts the cam near the end of the cam as circled in this picture:

Cam-Lever Contact.jpg

If it's not at the third notch or beyond as in the pic, thoroughly clean the cam linkage and lube it with a light oil.

Fast Idle Linkage.jpg

The spring for the cam is quite fine, so dirt and grime can cause it to unwind slowly. When operating properly the cam, its linkage and the choke valve should move freely and snap into position when the throttle is opened quickly.

If the lever-cam contact is correct and the linkage fine, check the delay valve and its vacuum hose on the valve cover side of the carb. With a hand pump, the vacuum should leak down slowly - about 1" Hg per second.

Thanks, will try this in the morning. Dumb question, but what is the best way to get good access to this area to do all of this? I had a hard time getting my hands in there while doing the fast idle test, and didn't have a direct view of what these pictures show, even with the air filter housing removed. Do I need to remove the carb? (hope not...)