Semi automatic choke
 

If I remember correctly, way back when, the choke on my SA22 would pop back in when the motor was sufficiently warmed up. That has not been the case for a long time. It's now fully manual. You have to push it back in.

Anybody know how to fix it? What years had this same choke?

Herb

SA/FB Choke
 

Check the temp sensor wires on the back of the Water Pump.
.
SA had different threads than the FB so you can't switch between SA and FB without changing the water pump or using and adaptor of some sort.
.
There are instructions in the service manual for testing the sensor itself.
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Broken wires at the sensor are often the cause of your problem.
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On or Off
 

When the ignition is off should the choke release (slide in) or stay put? It's been so long since it worked I can't remember.

Herb, I think you need power to keep the choke out? Envy your problem. Since day-one my choke pulls out and stays for all of 30 sec. then pops in regardless of the temp...
Your magnet won't release, mine won't hold.

Stu Aull
80GS
Alaska

You both have bad temp senders if all your carb springs are stock. The stock springs are
just right to pull it back in after it warms up. The temp sender activates the magnet until
it hits approximately 159F then it should let go. Mine works but the fat nikki doesn't have
strong enough spring to pull it back in completely. Of course I have no real choke just the
fast idle cam that the choke cable is attached to now.

Ah. Thx t_g_

Stu Aull
80GS
Alaska

Where is this sensor of which you speak? Herb

Its on the back of the WP housing by the tstat. Has a 2 wire connector
on it.