Piston Skirt
-
Posts
138 -
Joined
-
Last visited
Content Type
Profiles
Forums
Classifieds
Tip Site Directory
Blogs
Articles
News
Arborist Reviews
Arbtalk Knot Guide
Gallery
Store
Freelancers directory
Everything posted by Piston Skirt
-
Well, that chassis was made almost 20 years ago by Shindaiwa and is basically inherited :). Since then from approx. 2007 all new Echoes are “springed” too. 171/181 wasnt yet around, 310 already was spring suspended. As for Metabo - yes, the compensator is really nice. But if you work hard, fingers still start tingling way sooner than with a chainsaw.
-
The numbers are averages taken using 3 axis measurements at several rpm ranges. There are also values for 8 hour days, those are typically way lower (as they take into account 1/3 engine off time). Sometimes all these numbers do not tell the story, but they are still a good reference. Also note, there are separate numbers for front and rear handle. As a max. value 5m/s is already a noticeable figure for prolonged usage. Homeowner trimmers and blowers come as high as 8-10m/s. Angle grinders are a tragedy anyway
-
Of all the things 390/446/452/490/500/501 had/have, brake definitely is not a problem. AV cushions - yes, for guys that love to get the bar pinched and then pull out.
-
51x36, two piece crank.
-
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.
-
Springs.
-
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.
-
That sort of pre-cleaning has been used in Echoes for almost 30 years. 7310 has this feat but just as a final stage.
-
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.
-
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.
-
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.
-
Which B&C did 2500 have on it? Sugi quarter” or chattegon 3/8?
-
Here’s one more review:
-
Already released.
-
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):
-
It’s a fixing point for lanyard.
-
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
-
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.
-
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.
-
Nope.
-
Well, you can always open that top cover and stare into that huge filter That design is also Kioritz btw
-
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)
-
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.
