Chainsaw Repair
Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Husqvarna => Topic started by: farmboy on December 09, 2013, 07:55:31 am
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Been wanting a 562XP since they came out. Want a 550 too. Had a DA moment broke down and bought a low hr. 2012 model on Ebay. Paid a little too much but that's what impulse buying does. Saw came UPS with bar attached. Packing was so good UPS couldn't kill it. Anyway broke it down for cleaning ( saw was pretty clean). Pulled muffler to do a MM before starting it. Piston is scored but not too bad but never the less scored. My question is WHY is it scored? Saw a 550 that was scored it was on a new one owned by a member of one of the saw forums. Knowledgeable guy so it wasn't ignorance. I thought auto tune would take care of the piston scoring issue if you mix oil correctly. Seller has offered a full or partial refund so that's not an issue. Went on Jacks last night $284.27 for a P&C ouch. I need a better price I don't know if the seller will refund more than half of purchase price. It needs a cyl cover too it's warped from a lick on the top over the AF. That had to have happened before packing.
Shep
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I have built and done a lot with snowmobile engines, I always ask what oil people use in their motors, along with my own testing of oils, and have found you get what you pay for in oil, a lot of it is junk. They can't take the heat or high rpm.
I use redline race oil.
http://www.redlineoil.com/product.aspx?pid=19&pcid=16
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Contact Spike60 for cylinder pricing.
Ashokan Turf & Timber
;)
tell him Adirondackstihl sent ya
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Straight gassed is supposedly the only thing that will score a piston on an autotune, they say it will correct itself for everything else...
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Straight gassed is supposedly the only thing that will score a piston on an autotune, they say it will correct itself for everything else...
That's what I thought.
Shep
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AutoTune cannot adjust for poor or stale fuel. ;).
And contrary to popular belief, it also cannot cure cancer
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AutoTune cannot adjust for poor or stale fuel. ;).
And contrary to popular belief, it also cannot cure cancer
I believe you are right, it dosn't have to be streight gassed. ;D
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Autotune cannot correct for poor oil
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Most of todays oils meet or exceed manufacturers specs. JASO whatever whatever...etc.etc
Yes, we know you like Redline oil. Just like I prefer Motul.
But most people who spend that kind of money on a 562, aren't heading to the local Go-Go Mart to get outboard oil for their $700-800 saw.
My money is on fuel quality. Not oil quality.
I just took in an EFCO 952 with the beginnings of what could have been a bad ending.
Detonation from stale fuel and a little heat scoring on the piston.
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I don't know a whole lot on the autotune but recently purchased a new saw. I went and talked to 4 local dealers a year ago and none of them recommended a saw with autotune. Just did some searching around and see a lot of mixed reviews on the autotune, lean burn downs, hard starting when hot. Husqvarna claims 20% less fuel usage and 60% less emissions, well these saws have to be on the edge of going lean, so it will not take long to scuff a piston, so if the autotune fails, well you know the result. Its to new of a development to be trust worthy if you ask me.
By the way, I bought a 390xp. : )
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As far as oils go, they may all meet a spec, but in real world conditions, they don't protect the same. Granted this list is for snowmobile oil, but it gives you a idea.
https://docs.google.com/spreadsheet/ccc?key=0Ag4oddHerRnudDF3QVJLeDRrbExmSGhsc1FlWFdueHc&hl=en_US#gid=0
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''Had a DA moment broke down and bought a low hr. 2012 model on Ebay. "
"But most people who spend that kind of money on a 562, aren't heading to the local Go-Go Mart to get outboard oil for their $700-800 saw."
You would be surprised on what people do, the biggest problem is EBAY, unfortunatlly there can be a lot of ignorant people in this world....
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I don't know a whole lot on the autotune but recently purchased a new saw. I went and talked to 4 local dealers a year ago and none of them recommended a saw with autotune. Just did some searching around and see a lot of mixed reviews on the autotune, lean burn downs, hard starting when hot. Husqvarna claims 20% less fuel usage and 60% less emissions, well these saws have to be on the edge of going lean, so it will not take long to scuff a piston, so if the autotune fails, well you know the result. Its to new of a development to be trust worthy if you ask me.
Right.. Auto tune on the edge with rev boost, a bit too lean. Steve
By the way, I bought a 390xp. : )
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I have a 545 and a 550 and like them very well. No fiddling around with the screw driver before you use them.
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I don't know a whole lot on the autotune but recently purchased a new saw. I went and talked to 4 local dealers a year ago and none of them recommended a saw with autotune. Just did some searching around and see a lot of mixed reviews on the autotune, lean burn downs, hard starting when hot. Husqvarna claims 20% less fuel usage and 60% less emissions, well these saws have to be on the edge of going lean, so it will not take long to scuff a piston, so if the autotune fails, well you know the result. Its to new of a development to be trust worthy if you ask me.
By the way, I bought a 390xp. : )
Wrong, wrong, wrong and wrong I'm afraid. Many dealers are simply not up to speed with the AT saws. They don't even have the diagnostic tool and many that do don't know how to use it. These guys will continue to steer folks away from AT cause they're scared of it. Don't know how long they plan on staying in the business, because AT is the way things are going to be.
The hard starting was due to lack of reserve voltage in the coil; nothing to do with AT.
Early 562's had case bolts that could back out, and that was the cause of some lean outs, not the AT.
If the AT fails, it defaults rich and can't wipe a saw. I've seen several 576AT's that were saved by the auto-tune dumping in extra fuel to compensate for something like a **** boot.
End users and dealers alike tend to blame everything on autotune cause they don't understand how it works. I mean if a tree falls the wrong way, it must be the auto-tune right?
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Spike 60, what is actually telling the carb to richer or lean the mix? The only way to be done properly is with a o2 sensor? Throttle position sensor, and a ecu that controlla fuel flow and spark advance. So how does the auto tune work? Also what is reserve voltage on a coil ? Does it have a capacitor on it?
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Wrong, wrong, wrong and wrong I'm afraid. Many dealers are simply not up to speed with the AT saws. They don't even have the diagnostic tool and many that do don't know how to use it. These guys will continue to steer folks away from AT cause they're scared of it. Don't know how long they plan on staying in the business, because AT is the way things are going to be.
The hard starting was due to lack of reserve voltage in the coil; nothing to do with AT.
Early 562's had case bolts that could back out, and that was the cause of some lean outs, not the AT.
If the AT fails, it defaults rich and can't wipe a saw. I've seen several 576AT's that were saved by the auto-tune dumping in extra fuel to compensate for something like a **** boot.
End users and dealers alike tend to blame everything on autotune cause they don't understand how it works. I mean if a tree falls the wrong way, it must be the auto-tune right?
Very true! ;D