Husqvarna 572xp help

RED-85-Z51

RED-85-Z51

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Man...just read this whole thread, that's wild...*pats adjustment screwdriver in chest pocket*

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Backstage

Backstage

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Trying to find my tape measure
Similar issues with two brand new autotune saws (572xp and 550xp). They’re starting real hard, and on a variety of fuels. You pull and pull, and it just floods. Then you go pull out the old saw you were hoping to have cleaned for the last time this season.

I also have had luck starting with throttle full open.

I can also confirm that it cleans up much faster than the 45-60 second time in that atfleetcommand vid. I’ve never been so impressed with how well a saw cuts.

I’ll definitely be looking into inspecting that metering needle.

For those looking for part numbers and service parts, check out the Workshop Manual. You can find it easy as a download by searching the web for “Husqvarna 562xp workshop manual”. (the 562 also covers the 572). It has all those service tool part kits listed with part numbers that you can then locate them by.

It’s unlikely the electronics are getting confused by the WOT start. Your own troubleshooting should make that clear. No change to the electronics, carb changed out, now it works. Not electronics. That means it’s either the carb itself, the something that happened during disassembly and reassembly (the old “I took it apart, put it back together, now it works!”). Or simply something that happened naturally during the time interval. Changed gas? The system cooled? Fuel tank pressurized?

Again, I really love this saw when it’s cutting right, but I’m going to have to see an elbow specialist if this keeps up.
 
Backstage

Backstage

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Just opened the carb. Impressed with how well laid out that thing is, by the way. Open the top shell, one electronic clip, then four small phillips screws to access the carb diaphragm.

Needle valve and associated assembly is free and clean (as one would hope on a new saw). Diaphragm is perfect. Assembly in reverse, purge a few times, starts up fine. For now.
 
huskihl

huskihl

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Just opened the carb. Impressed with how well laid out that thing is, by the way. Open the top shell, one electronic clip, then four small phillips screws to access the carb diaphragm.

Needle valve and associated assembly is free and clean (as one would hope on a new saw). Diaphragm is perfect. Assembly in reverse, purge a few times, starts up fine. For now.
That’s half of it. You’d need to remove the carb to inspect and clean that side
 
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