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ZERO's latest activity
ZERO
reacted to
JRHAWK9's post
in the thread
Cold weather-cold starting 550 xp autotune
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Like
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It's not a primer system that can be primed too much. This purge system simply pulls fuel through the system and back into the tank...
Feb 15, 2026
ZERO
reacted to
EFSM's post
in the thread
Cold weather-cold starting 550 xp autotune
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A purge bulb should function as that—purging air from the system. If everything is working as it should, then you can’t pump it too...
Feb 15, 2026
ZERO
reacted to
brushwacker's post
in the thread
Cold weather-cold starting 550 xp autotune
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Like
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It has been starting better. Maybe it fine tuned itself and I fine tuned my technique i am thinking. I settled on 4 or 5 pumps when...
Feb 15, 2026
ZERO
reacted to
EFSM's post
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Cold weather-cold starting 550 xp autotune
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It could be a bad coil. I’ve seen a bad coil on a 550 (2022ish) that was totally random and very frustrating to diagnose.
Feb 15, 2026
ZERO
reacted to
brushwacker's post
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Cold weather-cold starting 550 xp autotune
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I get a good pull drop starting with my left hand on the pull cord until about 10 pulls i begin wearing down. Been using an 064 when...
Feb 15, 2026
ZERO
reacted to
redneckhillbilly's post
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Cold weather-cold starting 550 xp autotune
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I think these autotune saws take more a healthy pull to get them to fire up, if you have a bad shoulder and cant give it a healthy...
Feb 15, 2026
ZERO
reacted to
DillonBuck's post
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Cold weather-cold starting 550 xp autotune
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how old is your gas? If there is any chance it was summer blend, get fresh. The ability to evaporate in cold temp is the basic...
Feb 15, 2026
ZERO
reacted to
legdelimber's post
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Cold weather-cold starting 550 xp autotune
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Like
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Does the heating element just feed strait from the source coil? When switched on. How many watts is the heat draw with a cold element...
Feb 15, 2026
ZERO
reacted to
EFSM's post
in the thread
Cold weather-cold starting 550 xp autotune
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Like
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^Sounds logical. A dragging clutch, especially on a concrete saw, can cause the same problem, depending on the ignition timing curve at...
Feb 15, 2026
ZERO
reacted to
Stump Shot's post
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Cold weather-cold starting 550 xp autotune
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I think it's just the extra drag on the cold engine that is impeding starting, as the saw needs to hit 800 RPM to generate enough spark...
Feb 15, 2026
ZERO
reacted to
hacskaroly's post
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Cold weather-cold starting 550 xp autotune
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Like others have said, I don't think the heat side is stealing any power from the spark. The heated lines are fed by a generator that...
Feb 15, 2026
ZERO
reacted to
Stump Shot's post
in the thread
Cold weather-cold starting 550 xp autotune
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Like
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I wouldn't think the heat being on would affect it either, however, I did run across a 550XPG MKII that had that very same affliction...
Feb 15, 2026
ZERO
reacted to
Ketchup's post
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Cold weather-cold starting 550 xp autotune
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Random ideas: Does it blow smoke when it finally starts? How old is your fuel line? I feel like they don’t seal all that well...
Feb 15, 2026
ZERO
reacted to
brushwacker's post
in the thread
Cold weather-cold starting 550 xp autotune
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Like
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The other day at about 20 degrees after pumping the purge bulb about 6 or 7 times and normal choke procedure I pulled it about a dozen...
Feb 15, 2026
ZERO
reacted to
FederalQ's post
in the thread
Cold weather-cold starting 550 xp autotune
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Like
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I would not believe the heat switch would make a difference to the spark plug, it’s a separate system. I have the same issues with a...
Feb 15, 2026
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