wyk

Looking at them on line, they do seem fairly wide. I will look into cleaning up the old top end tomorrow and see about it.

D'ya know the width on that 064 piston skirt vs the HyWay? I had it to within 1mm. Which, for milling, is prolly not a good idea. The squish on this BB was .028 or so. Which makes sense it would be nearly the same as the stock 65cc piston is.

On the old hyway? Well, it is a bit, but I suppose I could reuse it if I wanted to. The problem is, especially after the difficulty I had fitting this new top end onto the new piston, the old jug had more tolerance than I cared for even before this happened. It just was never that "damn this is a pain in the ass to stuff a piston into" fit that you usually get. I was hoping dual rings would solve any issues, but I suspect it was a contributing factor. I was running cabers, too.

Thanks, bud. I thought she was safe at 13.8K since she ran at 14.5 easily for felling all day long without a problem. But turns out it wasn't rich enough. Either that or I just should have given her more breaks than I did. It's a mistake I won't make in the future. I was in a hurry today and just kept going and going. There was a ton of oil in the case, so I suspect it may have been a heat issue. The new cylinder looks cool with the porting the way it is, but it's more looks than go, I suspect. Open ports tend to be lackluster on torque. I only raised the exhaust back up to a couple of degrees more than where she would sit with the gasket. I mostly widened it for timing. She sits at .027 squish without the gasket. I'll run her some tomorrow and hook up the compression tester to see how healthy she is. I will be surprised if she runs close with my ported 361 now.

So, I've been milling with my 2177 for a bit now, and let me tell you - richen the hell out of your saws if you are going to be milling with them. Especially if they are ported. I noticed a lot of compression loss today after a few long cuts. I put the thing on the gauge and it's blowing 100psi! I think the exhaust also might breathe a bit too well for milling. I also suspect the piston fit on the 77cc hyway wasn't very good, and may have contributed to it wearing. All I had laying about was a 365 open port top end. So, I decided to mildly port that and put it on the saw to see if she would mill worth a damn. Here's the first pass grinding on the lowers: The images make it look like I went deep into the barrel, but it's only a few mm's. I've ground out to the edges as far as I cared to, and opened it up to pull more fuel from the case. I didn't go crazy since she's an open port, but she does run very nicely now. I added some timing and reshaping to the top of the ports, but didn't go nuts since I mostly want mid range torque. Somehow, I doubt she'll pull as well as the old hyway did, let alone as well as a mm 560xp. I just hope she can mill small planks decently until I decide on a replacement.

What can I say? I had to stop drinking in work.

Oh, even Americans know about duels. Just ask our previous presidents. I meant once ya did the 330 in, you then had to advance to the Hyundai. And Koreans are very strict about vengeance. This sort of reminds me of that one duel where one of the seconds was actually the woman that the opposing dueler was dueling in regards. He ended up killing both her, her lover, and basically the love of his life. All before 10am. I am sure there was mist, since they did use sabres. Duels can be a good time. Anywho, defeat me, and you must defeat the Hyundai. Ahh, you English. So civilised (I had to ignore the American spell check to add that last word).

Yer in all sorts of trouble. This is my second: Hyundai HYC4618 46cc 2-Stroke Petrol Chainsaw

Yer 357's vs my 330EVL then! Bring it! I get a handicap start tho - like bracket racing. And I also get to fuel your saw.

I was hoping Spud would say sumfin. Even so, I think on even footing, SPuds saw was faster.

If a ported 357 can not outcut your 560, then it's not the 357's fault - that's the porter's fault. A competently ported 357 with compression adjustment will crush even a muffler modded 560.

Not quite porting, but certainly tuned. This is my ECHO 330EVL. I went in an cleaned up the intake and exhaust parts to flow better, then utterly gutted the muffler. I then advanced the timing about 40%+ or so of the key. Sounds nice for a 33cc saw, I thought. The bar is very worn, so oil is flying everywhere. I have a nice new GB bar enroute for carving. https://www.youtube.com/watch?v=rdx5sgRRO2U&feature=youtu.be

One more of the MS361 when she was younger:

Here's my lil 330EVL Echo:

On my Echo 330EVL, though not as fast with the chain as a 200t, I almost can not bog the thing with low pro chain. I often have the 14" bar buried in beech, and she keeps chugging right along even if I push it.

Even if it could run and oil a 24" bar, you'll find the balance is complete shite with one. My ported 361 barely balances with a lightweight 24" bar.

I've said it before, and I'll say it again, there's very little out there in petrol power more simple than a chainsaw. Everyone should invest time becoming familiar with theirs, especially professionals.

In the states, the 365 special has internal transfers, similarly to the 372.

Silly PNW'ers. Whattaya know anyways? Well, the 630 is a bit heavy compared to many modern 60cc saws, but in it's defense, it is also underpowered. I think a 560 would do well to replace them. But if weight is not an issue, a 365xt/2166 would do the job alright. I assume that's what yer man wants to set you up with.

I use rapeseed to good effect. It's not as thin as other veggie oil, and not quite as thick as the bio stuff. I actually think the tackifier they use in bio oil(which is up to 98% rapeseed) causes more issues than it solves. Regular rapeseed works fine for me.

A pack of dry wall screws are about £35 less...I'm sure you already have needle nose pliers.

I got this in about a month ago to use for finishing work on some furniture I have been making. I was growing tired of nearly killing myself using a ported MS361 for the smaller stuff. She cleaned up easily, and shows very low miles. I followed a thread in AS that complained about his not having much compression. So I was quite impressed when I first tried to pull her over and she was fighting me back. I put the gauges to her and she pulled 195 and 202 psi on the Mercury outboard and the Proto gauge. Since I only need her for a bit of mid range torque for finishing and some carving, I decided to simply muffler mod her for some better throttle response and not port her. Very strange baffle design. he bottom of the muffler has a bolted flange. The insides had two baffles, which I removed, and what looked like bolt holes for an additional baffle. A bit louder now, but not disagreeably so. Oddly, the exhaust gasket was very thick plastic with much of it impinging on the port itself. With a rotary tool, I opened the exhaust port at least 8-10% by simply blending the gasket, which was very thick easily reusable. SHe's in lovely condition: Does any one know if these clutch cover nuts are stock? They seem godaweful small.

Thought I would add these: Husqvarna 385xp, ported, 32" Oregon Reduced Weight bar: McCulloch PM 800 with a simple muff mod, 32" bar:

In fact, the blue coil has a more aggressive timing advance.

The 'optimum size' has more to do with noise in regards to gain. In most chainsaws, you can make huge holes in the muffler and still see gains. However, huge holes often mean huge noise. So when they usually talk size, it's more about balance than ultimate gains.