Husky idles up, dies when grab throttle

[biggus]

Nope, have not tried the 'L' adjustment, haven't been home yet. I work on an AFB and they get a little weird if I bring a saw in and set it on my desk and try to start it... like it's a WMD or something.

I'd just bring it in and start it up at your desk job and when people look at you weird just tell 'em "don't ask don't tell."

...right?

 

[fossil]

I'd just bring it in and start it up at your desk job and when people look at you weird just tell 'em "don't ask don't tell."

...right?

I like that idea.

I've only had two saws that had vacuum leaks and one would not idle well and the other at all. Both would run at full throttle.

I had that very problem you have with a Homelite I just acquired. The carb needed cleaning and after that all was well. Maybe you knocked some crud loose when you were removing the clutch. I'm not sure what carb you have on your 455 but Walbro and Tillotson and I believe Zama have very good parts explosions and overhaul instructions on their websites.
If you are going to the trouble of taking the carb apart it would be worthwhile to put at least new gaskets and diaphragms in it.
It's a very simple job if you take your time and watch what you’re doing. A tip I've found useful is do the rebuild on an old towel so the inlet needle spring or any other small parts don't get away from you. I hate crawling around the floor looking for them.

 

[outdoortype]

If it was running fine before I doubt you need to adjust the carb to get it to run. Check the fuel tank vent for blockage. I would then closely examine the fuel line for cracks/kinks and the same for the impulse line. If the impulse is loose/kinked/torn it will not send sufficient pressure to make the carb pump fuel. These things are much easier than taking the carb apart.

 

[brownsrplm]

Nope, have not tried the 'L' adjustment, haven't been home yet. I work on an AFB and they get a little weird if I bring a saw in and set it on my desk and try to start it... like it's a WMD or something.

Will try the 'L', just looking for all possibilities before I make things worse then they are. Just strange that it happened so quickly and the fact it absolutely will not even try to run unless I pop the choke on/off.

Just a thought, but you said you can start the saw at first, and then it bogs out when you try and give it gas? This may sound strange, but I've seen it before, just recently in fact. Check your ignition module/coil pack. when they heat up they lose spark causing the symptoms you describe. If it was fine before you started hammering on the clutch, it could have dislodged it or caused it to short. Electronics are delicate. I went through the whole process described by the others here, and they are all good ideas, but when all else fails, you have to look at electrical!

 

[tdcarter]

If it was running fine before I doubt you need to adjust the carb to get it to run. Check the fuel tank vent for blockage. I would then closely examine the fuel line and the impulse line. If the impulse is loose it will not send sufficient pressure to make the carb pump fuel. These things are much easier than taking the carb apart.

Just a thought, but you said you can start the saw at first, and then it bogs out when you try and give it gas? I went through the whole process described by the others here, and they are all good ideas, but when all else fails, you have to look at electrical!

Thanks guys. Yep a little leary to tear into the carb or think it is electrical as it was running fine and will still run fine, as long as I don't touch the throttle. That includes just blipping the throttle to jump it down from fast idle to slow idle. So is there a seperate jet for the fast-idle/start-up sequence, or does it just pre-set the throttle and hold it at a certain point? I did think of maybe counting the number of turns in on the H&L screws, then backing them all the way out and try turning the starter over to see if anything is maybe clogging up the jet?

The GF's truck had a flat on it last night, so by the time I left work after my 12 and drove to her place then back home it was too late to play with the saw.