Husqvarna 564xp (g) fuel inject

[EFSM]

Bearings on the saw spin around and around...

Isn’t it ‘round and ‘round?

 

[mainer_in_ak]

Very interesting read, thanks for linking that. Echo uses steel pocket liners in their CS-620/600/590 model saws. I always figured that the wallowed pockets that Husqvarna struggles with are due to their alloy composition in the crankcases. I am open to other suggestions but still haven’t seen any evidence for flexing cranks. I still believe that flexing cranks would break over time and I’ve never seen that on a 372.
Enough derailment of this thread. I bow out.

Wow, I never knew about these steel pocket liners on the 620/590. With that freakishly long stroke, always wondered why the dmn things dont grenade in multiple pieces when you free rev em to 13-14k rpms.

Glad to see Husqvarna and Stihl putting effort into torquey 60 cc saws. These are what I run most.

 

[Maintenance Chief]

Wow, I never knew about these steel pocket liners on the 620/590. With that freakishly long stroke, always wondered why the dmn things dont grenade in multiple pieces when you free rev em to 13-14k rpms.

Glad to see Husqvarna and Stihl putting effort into torquey 60 cc saws. These are what I run most.

I know the early 044 had a steel insert in the pto side too.

 

[Stump Shot]

There's been a lot of buzz going around about interest in the new 564XP saw with folks I talk to. Personally, I am excited to get inside one and see what makes it all tick. Such as the coil hiding underneath the flywheel, taking on multiple roles. Who knows what other new thing is in there just waiting to be found. The future in the world of saws is looking bright indeed.

 

[MG2186]

As far as bearing failures go in the 562PXP(and 550XP) are concerned, bench analysis has attributed the retainer cage failures due to heat. In the pile of 562XP's I've gone through, this was the case every single time and has been well documented for years now, but I'll go through the scenario one more time here... it comes down to an operator unwilling to quit cutting with a dull chain heating up the bar and overtaxing the saw. The bar pad transfers the excess heat to the case which happens to have the bearing pocket right next to it. This then melts the cage enough to fall apart; all the bearing balls go to one side causing the seal to leak air until the top end seizes. Operators that keep a sharp chain do not have these types of failures.
As far as bearing pocket failures go, this too can be contributed to heat. I actually see way more 385/390XP saws with this failure than the 372XPXT and/or the OE for that matter. All of these saw's experience ZERO crankshaft breakage, thus eliminating the "flex" theory of a motorcycle engine. What is seen is too tight dull chains with burnt bars. And just how do we take a saw case apart, heat it up, the bearing will fall right out. Surely manufacturer specs have a part to play, we can see that the earliest versions had much more problems than that of later ones that came out.
So, in conclusion, we can say that if you want to keep your XP saw in good running order, run a properly tensioned and sharpened chain and you won't have these issues, don't want to quit cutting with that dull chain and you'll be visiting your saw shop real soon. No amount of oil ratio or secret blend will save you.
My conclusions come from actual case by case saws that I've repaired along the way. I have not seen a 564XP yet to even begin to comment on how it is built, I can only say that the subsequent 572XP and 592XP are faring much better having enjoyed a long R&D period prior to launching. The 564XP from what a Husqvarna rep has publicly said has also gone under such scrutiny, so, it at least has that going for it, as well as the under the hood sneak peaks we have seen, it looks nothing like a 562XP.

Nicely and well put! Actual real life testimony based on facts and not just hear say!

 

[bwalker]

There's been a lot of buzz going around about interest in the new 564XP saw with folks I talk to. Personally, I am excited to get inside one and see what makes it all tick. Such as the coil hiding underneath the flywheel, taking on multiple roles. Who knows what other new thing is in there just waiting to be found. The future in the world of saws is looking bright indeed.

Those new tangled saws are all junk with low quality bearings dontcha know.... that and mtronic/autotune/ strato/ efi are epa sorcery!

 

[ZERO]

... Personally, I am excited to get inside one and see what makes it all tick.

Steve I too am waiting on the other side, a teardown/review or what will go wrong with these in the 1st year from a very trustworthy source.

... Who knows what other new thing is in there just waiting to be found. The future in the world of saws is looking bright indeed.

One take away from Scott's video is that the purge bulb is still just that ... nothing being injected into the cylinder.

Rep did say they did a good amount of RD, only time will tell..

 

[Ketchup]

One thing I have noticed with the modern saws is difficulty diagnosing wiring problems. I’ve found bad wiring in 201, 462, 550 and 500i. Hopefully the 564 is designed with a replaceable wiring. The dedicated wires on the 500i cost me a lot to diagnose and the software was useless.

 

[SawAddictedFarmer]

Those new tangled saws are all junk with low quality bearings dontcha know.... that and mtronic/autotune/ strato/ efi are epa sorcery!

And yet all the 500Is I know of out here are being beat to death, run by people that don't know what they're doing at 50:1 on Stihl ultra and just keep on going? The tree crew that dumps us logs loves them and boy do they live a hard life, dull overtightened chains and almost no maintenance until they break something and get sent into the shop.

 

[Ketchup]

And yet all the 500Is I know of out here are being beat to death, run by people that don't know what they're doing at 50:1 on Stihl ultra and just keep on going? The tree crew that dumps us logs loves them and boy do they live a hard life, dull overtightened chains and almost no maintenance until they break something and get sent into the shop.

That’s the fate of most good saws. Especially in the hands of production tree crews. We operate at $125/man/hour. Three or four of us sitting around blowing out saws and sharpening chains can get expensive pretty quickly. I do 10-14 hours of maintenance per week but the chippers and trucks take precedence.
Truth be told, our big saws hold up pretty well. It’s the little ones that really take a beating.

 

[ZERO]

Most important take away, the Husky team is monitoring our forums.

The reference to the modding world was a mirror to a private conversation that me and @Stump Shot Steve had when he worked on my 5 series project.

Waiting to see how clean and polished the stock ports will be.

 

[IffykidMn]

Time will tell on that one. I’m curious if they kept the junk crank bearings or if they decided to improve them.

Scott said that they updated 562 bearings in the past and that the 564 uses the same part number as the newer updated 562 bearings.

No hard facts or part numbers but it was said that the 564 uses a 572 piston or something of similar size.

Being a late adopter thinking I will wait a year or two on a 564 and possibly the MkII or III, maybe by then I will be old enough to appreciate the virtues of a 60cc saw that runs like a 70cc rather than just running 72-79cc saws.