Piston Skirt
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Everything posted by Piston Skirt
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501sx chassis is essentially Shindaiwa 446/452s that is very old. For the past 13 years all new saws developed by Yamabiko come with springs, 360/361/362 being an exception.
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Springs.
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This one has both, plus “injection” part has and additional small particle separator in the duct kink. Then the air is circulated around the filter and sucked out by “g-force” channel.
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That sort of pre-cleaning has been used in Echoes for almost 30 years. 7310 has this feat but just as a final stage.
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Oil Pumps are quite simple mechanisms - assuming there is an oil film between the plunger and cylinder bore there is virtually no direct metal-to-metal friction. Reality is different though - sometimes these cavities get dry(er) and metal friction happens which leads to gradual (or immediate) wear. Typically oilers are damaged because abrasive dirt particles get from the tank through the strainer into the pump or the strainer simply gets clogged by dirt or bio-oil wax. This is the reason why manufacturers kindly ask to maintain regular oil tank and oil strainer cleanups and not leaving bio oil there for too long.
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If you’re comparing to AP300. However AP300 is twice as heavy and nearly the same amount more expensive. And once you’ve done with the charge there is a lot time to spend looking at the charger. Or instead with 2500 you can just rotate two lighter batteries without interrupting your day and lift less weight for every cut. Generally all battery units (mowers, trimmers etc.) declare “WOT” runtime which is very different in real life as it is simply related to the system efficiency at max RPM - mode at which a chainsaw literally never works.
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Well, in stock form, both with 1/4” 2500 is not much slower than 2511. It actually has more torque but at slightly lower rpms. Takes a while until you get used to adaptive motor control with 2500 but once you do it cuts just as fast, with less effort and saves you some runtime. And yes, as the name suggests it’s a pruning saw comparable to 25cc petrol class and was made to be just it. Meanwhile toppers from other brands position themselves as 35-40cc equivalents hence more weight and power.
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Which B&C did 2500 have on it? Sugi quarter” or chattegon 3/8?
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Here’s one more review:
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Already released.
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If things are as in this photo - the biggest QuickDraw hook discovery is yet to come. It was reviewed in this video (from 1:15):
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It’s a fixing point for lanyard.
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Electric Performance in a Top Handle Chainsaw
Piston Skirt commented on Steve Bullman's record in News
18min runtime is with throttle unreleased entire time. Climbers use it 45-150 minutes of actual time which also involves changing positions in the tree. 2 or 3 batteries are more than enough for working non-stop without overloading anything. P.S. petrol top handle has a runtime of 20-30 minutes WOT as well, if engine doesn't seize -
Nope. Most of the units use the same 18650 TYPE lithium cells. Connecting them in series increases voltage (in V) but the capacity in Ah remains the same. Connecting them in parallel increases capacity in Ah but the voltage remains the same. Overall energy amount is measured in Watt hours (Wh) (=Volts x Amp Hours) so basically same amount of cells in the pack will be able to carry same amount of total energy. In real world it's easier to make higher voltage pack produce more power with less losses however it has some drawbacks. A decent battery for most tools costs slightly more than 1€ per 1 Wh. This varies a bit depending on the battery capacity and BMS
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Echo 355t for your main 'big climbing saw' // 16" setups
Piston Skirt replied to ArborOdyssey's topic in Chainsaws
I did not direct this at You that precise. No bad feelings, please. And yes, there is always something good and bad about every possible unit. -
Echo 355t for your main 'big climbing saw' // 16" setups
Piston Skirt replied to ArborOdyssey's topic in Chainsaws
Somehow I keep hearing "cheap plastics" mostly from people who like the company of poor metals... No offense, please.
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The "new" emission regulations are almost identical to the "old" emission regulations (some exceptions removed now). 360/362 aren't any different from that standpoint. 362 basically has cylinder coating that is more durable in certain work conditions.
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Nope.
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Well, you can always open that top cover and stare into that huge filter That design is also Kioritz btw
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Echo CS-390ESX (Shindaiwa 390sx or 2038s in Japan) is the successor of 389s which was introduced in the beginning of 00's. If you're looking for the chainsaw of that size, 390ESX is the way to go. CS-501 started it's life as Shindaiwa 446/452s. CS-620SX is originally Kioritz (ECHO) design from late 00's. 360/361/362TES/WES is also originally Kioritz. 2511TES/WES is purely Yamabiko (joint engineering)
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I'd just visit a nearest decent dealer - it's a direct simple swap for all older 2511 units (standard on a newer ones). Shouldn't cost much even if it won't be covered under warranty. Yet the idle problems are pretty rare so it's possible the dealer won't have it right away. Large gap spark plug is a different story - possible only on 2019 made models.
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Almost every model has some minor updates. Most of the issues are very location and operation culture specific so no wonder they are tweaked out. Even good 'ol 420ES had it's cylinder/carburetor re-done just to adapt for Aspen. The updated active coil function for most recent 2511 basically seems to be by-product of EMS which holds idle rpm rock-solid.
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Literally change the primer or just that the models with the black primer have been upgraded in some other way? First update was a black-background primer to address some possible idling stability issues. Now the 2019 models with laser-etched serials additionally have larger gap spark plugs and active idle ignition control for both improved work with alkylate fuel and even more stable idle.
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It seems these issues are in the past for the "laser-etched" models. Also interesting if OP's unit has an orange primer bulb or black? This was also implemented as a treatment for unstable idle.
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Recent CE rules put manufacturers in a tricky position - operator must not be able to reach hot/moving mechanical parts without tools. For chainsaws this means either toolless access to air filter only, or big cover that makes also cylinder easy to access but with a help of a tool. From that standpoint seeing/cleaning cylinder fins everytime you undo 3 clips for air filter is way better.
