Dan Crouthamel wrote:
On a Weber 9665s. BiMettallic Choke ( no electric ), Diaphragm Pulloff.
My choke stays open and won't close. What closes the choke on a cold start ?


If it starts ok, don't mess with it. The choke is typically heated
either electrically or by manifold heat. The heat moves the bymetal
spring. In warm weather ambient temperature might be enough to keep the
choke open even when the engine is cold. When the weather gets cooler
and only if you start experiencing hard starts, you might want to adjust
the choke slightly towards closed and see how it starts. Too much choke
and too much throttle pumping will flood the engine.