1987 Suzuki 250 Quadrunner Choke Issue

[Parham]

My quad will not start when temperature is below 40 F.  Starts and runs great in warmer temperatures.  My choke doesn't seem to be working...should the plunger be "IN" (down) or "out" (up) to actually "Choke"?  Not the little choke lever...the actual plunger in the carb?

[Gwbarm]

The plunger should be out to choke, it is more of an enricher more than a true choke.

[Mech]

Yeah the plunger needs drawing out for choke, and they only work at idle, and it needs to be a slow idle, with the butterfly or slide closed right down. They draw extra air and fuel around past the butterfly or slide and that doesn't work unless the throttle is closed off .

[Gwbarm]

I have noticed a difference between the aftermarket choke plunger and the OEM plunger so if an aftermarket carb has been installed the new plunger that comes with the carb needs to be installed along with it.

[Mech]

Yup Gw's right there.. The choke plungers are often different, and so are the idle mixture screws different sometimes if it's an aftermarket. The idle screws can't be changed but the choke plunger can mostly.. but it might not always be so.