Jump to content


  • Content Count

  • Joined

  • Last visited

About wyk

  • Rank
    Senior Member

Personal Information

  • Location:
    Wicklow and Waterford Demesne, Ireland
  • Occupation
    Timber Cruiser, Sawman
  • Post code
  • City

Recent Profile Visitors

The recent visitors block is disabled and is not being shown to other users.

  1. wyk

    390xp squish.

    I only deal with inches when it comes to squish. I'm just dumb that way. The usual accepted spacing is .020", or near enough. As mentioned earlier, the fuel is 'squished' out of this band and into the combustion chamber. Often, whatever fuel is left in this band does not combust fully. So the closer the tolerances up to about .020", the better. Any closer and you are risking damage, especially if you are using something like a £20 tool from a former British Colony in Asia VS something like an expensive Mitutoyo or SPi Micrometer to gauge the depths. If you are considering doing port work, you may want to first spend time learning on something like a used, worn out two stroke motor VS a functioning 390XP top end. I began my porting days working on <$100 Echos that needed repair(so I could see the results VS using a destroyed engine). I would also spend a good amount of time on one of the outdoor power equipment forums porting threads beforehand to better grasp the nuances of porting. I learn something new there every time I visit. I don't build ultimate performance engines, and nor do you have to, but its good to know where to spend your limited time and efforts for maximum returns, let alone simply preventing making mistakes(like ring ends, free porting, bad timing, damaged plating, clearance issues, etc etc etc). In general, with porting, less is more.
  2. wyk

    echo *CS-390ESX experience

    Haven't had it for too long now, but purdy happy with it. The exhaust outlet cover does need to be longer. I assume this is simply robbed from the CS501SX and chunked on to the 390 since they look identical. With the cat removed, it doesn't spew it as directly upon the handle as stock(and not as hot, either), but I can still see it going to work on it. Otherwise, very, very impressed with this saw. A poster who has had one apart on another forum claims it is the same stroke(33mm) as the 501. I haven't tested it myself, but it would go a ways to explaining why these have so much mid range grunt.
  3. wyk

    Advanced chain sharpening.

    He might be sharpening deeper down in to the gullet, or using a different offset from you, getting a different hook, etc etc. I never change my file size, but I go pretty deep in to the gullet to retain the hook, often grinding in to the end of the link before the cutter. The tip/hook is what you start to lose as the tooth gets more shallow.
  4. wyk

    Advanced chain sharpening.

    Any more than that and your kerf is gonna shrink too small for your bar. Well, mebbe not the kerf, per se, but it's not gonna chew up the wood effectively enough to clear out the cut.
  5. wyk

    echo *CS-390ESX experience

    I can't confirm this, but SGFoley in Germany stated he ran a 501sx exhaust(without cat and baffle tube) in his 390sx.
  6. wyk

    Which Chainsaw for Forestry

    I started repairing my own saws because, back when I actually had money, I went to the dealer and asked them could they fix such and such on my thingy mubob, and they basically told me it wasn't worth their while or mine. It was something simple, too. I went to the local independent saw shop in Willamina, OR on my way back after some of the other loggers told me where to go(though he did have a Stihl contract and dealt almost solely in Stihl saws), which has a super grumpy owner(or had, it looks like he's closed since). Anyways, I showed him my old 046, he took it, went out back in to the shop, and came back within 2 minutes with it repaired. That guy knew his stuff, and had ported two stroke bikes back in the day. He told me what he did, and how to fix it in the future, and then refused to take money from me. From then on I was only using him for my saw needs. He explained the local dealers sell lawn mowers. So they want their techs to be free to set up new equipment for sale and repair riding lawnmowers - they make hundreds and thousands on those two, so do not want to waste their tech's time repairing saws. Some of them have never had a saw apart.
  7. wyk

    Echo CS281-WES melted exhaust cover.

    First - that's a terrible design(and I own a similar Echo as well). The exhaust should be directed more outwards(which I did by virtue of opening the bottom of that vent cover and the muffler underneath), and the cage should have a larger relief in case of roll over(you listening, Echo?). Otherwise, we love ours. I was told, back when I had a future in university, that if you must explain to an operator how to coddle your product designed for the field, you have created a terrible design. As for the bearings - at idle, the saw has disengaged the PTO/clutch, and there is much less load on those bearings, and there's much less friction/heat than at throttle. It's the piston that gives up the ghost rapidly without oil. The puff of smoke is likely more due to incomplete combustion on the front of the timing advance and the high speed jet kicking in than lack of enough lubrication.
  8. wyk

    New sthil reviews

    Just regurgitating what google told me about all this nonsense
  9. wyk


    And there's a bit of video now: https://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&amp;objectid=12190151
  10. wyk

    New sthil reviews

    The words you're looking for here, Stubby, are inertia/momentum. Torque is the measure of the turning force of a device. HP is the amount of work the device can do over a period of time. Momentum is the amount of kinetic energy an object has. Inertia is the object's resistance to motion. In an engine, you need to balance all it's aspects and design it for whatever use you intend. If you remove a flywheel from a saw, you'll see it could easily be made thinner and lighter. It's the weight it is for a reason. The flywheel has to do a lot of things in a modern saw - redirect air, trip the coil, balance the crank assembly, set the timing, start the engine, add inertia, and store momentum. In fact, most cars had flywheels installed mainly for momentum. It made the engines run more smoothly, with less vibration, and hold RPM's better when a force was applied(whether external or internal).
  11. wyk

    MS241C solenoid issues

    Same issue twice on my 241. I ditched it and went with an Echo 390ESX from RobD, AKA ChainsawBars.co.uk Too bad, too, cause I ported it and it would run strong for a while before it died:
  12. wyk


    I'll just leave this here... https://www.thejournal.ie/new-zealand-deported-4442504-Jan2019/
  13. So the consensus is no chemicals, hand removal, it will benefit the trees structure and livelyhood. Got it. Cheers, folks.
  14. This situation is more like your second statement than the first. It's thick and it's been in the tree decades. Symbiotic at this point. The tree is in a plane that perennially floods since it is not far off the river Suir. So, any structural damage will be tested on a yearly basis. I would hate to remove the ivy only to find the tree collapsed the next flood.
  15. We've plenty of ivy on the estate. There's no shortage of ivy in Ireland, far as I can tell. My main concern is the health of this tree. I have been removing ivy from it piece by piece over the last couple of years(it's large even by PNW standards), so it's unlikely going to be shocked. I was mainly wondering if there was a chemical means safe for the tree that would slow the growth of the ivy so I could attack the crowning ivy without having to put a climber in to what could be a rather unsafe situation, and risk less damage to the bark with forcible removal.


Arbtalk.co.uk is a hub for the arboriculture industry in the UK.  
If you're just starting out and you need business, equipment, tech or training support you're in the right place.  If you've done it, made it, got a van load of oily t-shirts and have decided to give something back by sharing your knowledge or wisdom,  then you're welcome too.
If you would like to contribute to making this industry more effective and safe then welcome.
Just like a living tree, it'll always be a work in progress.
Please have a look around, sign up, share and contribute the best you have.

See you inside.

The Arbtalk Team

Follow us


Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.