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@bwalker has is right - the vents won't do anything to keep the saw engine running cooler, but they may help keep the carb cooler. The vents are not in the part of the shroud that is used to duct cooling air over the cylinder, they're in the airbox. Vapor lock happens when the engine is off...

Lots of these on ebay: I put them on some of my Turbo Clean saws a couple of years ago - they had been laying around at work for years, no idea where they came from. @Nicholas_Cappadona is correct in that the Turbo Clean system has a hot start problem, because there is a connection from the...

Actually, it (conifer, fir, pine, stuff with needles) burns fantastic in a secondary combustion stove, which is all about igniting the volatile compounds cooked off by the hot coals. It burns hot and clean. Sassafras will do the same for a little while - unfortunately what's left after the...

They have all been made in China for many years. I think I have some very old Walbro carcasses that were made in Japan, but those are many decades old.

MS250 = expensive knockoff of a Poulan.

A lot of saws get tuned way rich to be "safe", and that does make them poky.

Certainly well beyond what I deal with!

Yeah, OK, but none of the saws I routinely use have slow throttle response (or I wouldn't use them....). That's why they're all ported at least muffler modded. It's not like I'm getting bored waiting for them to spool up, and I've never felt like it was so slow it put me at risk. So if the...

It'll be interesting to hear what you think. For me as a home firewood cutter the throttle response wouldn't matter - I have some with excellent response, and if the injection system made that a little faster it would be irrelevant. I know that it matters for pros in some circumstances though.

Throttle response can be effected by a lot of things, including porting, case volume and ignition timing. Regardless of injection or carb the fuel is still going into the case, which is a relatively large volume - it's not like port injection. Some of my carbed saws have very quick throttle...

OK - I have a bunch of 40cc saws and there a large difference in the weight of the saw, but they all have essentially the same carb. So it's hard to credit the injection system with the weight reduction.

What is the relative weight of the injection system components compared to a typical carb? I've worked on a bunch of carbs - they are a self contained unit and don't weigh much.

I can't imagine that the injection system would be happier with corrosion than a carb. It's got to use the same materials (cast pot metal, steel, plastics, etc), so how it handles corrosion would just be random chance depending on what part got damaged. On the other hand a carb cannot vaporize...

Describe one advantage of this injection system on a saw (hint: there may be one, but it's minor). Remember, it's injecting fuel into the case. It has no sensors for air flow or exhaust O2 and must use the same methods as Autotune/Motronic. It's 3deg out, I'm bored and sitting here drinking...

As long as they don't break through...... Don't forget to look at the piston to make sure it doesn't have features that conect the ports.

I have no idea what the timing is on that one to start with - it's a similar design to the transfers on the strato GZ4000 so you can aces them the same way, but that may have diferent timing.

Years ago I was taking down a double trunk ash that split low to the ground. When the first trunk fell, the other trunk, which I had not touched, just broke off and fell too, with no control or direction. That was an eye-opener. I tap all round them with a hatchet to try to find the defects...

How do they seem to be doing? I'd have to figure the EAB is still around, but is it possible their population has stabilized to something where the ash trees could survive?

Close up:

Yeah, that's been my experience with the ones killed by ash yellows too. Sometimes the whole thing is punky, but often only the bottom. I've seen them with a punky section that runs up a long way though, which can screw up your hinge and make it fall unpredictably - had one like that just a...