455 Rancher wont idle

[saxon]

The saw cranks good and then runs fast no problem, but sit her down and after just a couple seconds she dies.
The L and H are 3/4 turns out.
Thank you

 

[Homer6679]

Fast as in high idle?

Could just need some carb tuning

 

[Tothemax]

Try turning in the T screw a turn or two and see what happens. If it still wants to die, you probably have an air leak.

 

[singinwoodwackr]

Try turning in the T screw a turn or two and see what happens. If it still wants to die, you probably have an air leak.

The 455 has issues with boots cracking.

 

[WoodyGuy]

In the spirit of try'n the easiest stuff first ..... when was the last time
you changed air filter? I have a 460 that was do'n the same thing ...
would start fine, run great, but started idling down to the point
of stalling, specially when good and warm. I put in a new air filter,
and the pro'lm went away. Just say'n