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I think the need for better combustion is here in environmental regulations and fuel economy. Last I heard this was not tested in HVA labs, but controlled. If they can test it out to work well, the optimal setting should apply every were. But just regulate fuel thru RPM will not do it.

That is were the trick is I think. A cool saw and a hot saw need separate settings to get same emission results. As it is today we get a setting that is good for the work we do. Not optimal for cool or hot saw, rather a compromise. Lets say you could regulate the operating temp of the saw. With...

Ha! LCD readout.. No, I more thinking of the controlling of them thru the systems. Example: Say you are doing some heavy cuts and saw heat up. How many pay attention to this? A lot of saws could be saved from recycling if the temp was regulated. Emissions would be better as the saw would run...

There is study's made here from Husqvarna, Partner, Jonsered, and our government testing division. Why it is not a feature in saws today I can't figure out. It should be a lot easier to keep emissions and performance if the systems interacted. Weight can't be a issue, as the saws are heavier...

In most of the engines the heat development is a factor that is well measured, calibrated and considered. But for some reason it is not so on saws. Electronically controlled ignition in one system. On some saws, Fuel system is electronically controlled in an other systems. Both independent of...

There are experiments you can do to test this and show! I put a busted rod on a piston, inserted it to cylinder and heated from inside it so I just barely could touch the fins. Shut heat of and wait a couple seconds. Then try to touch the fin...

It is not uncommon and is no problem as long as it cools properly. It is when it gets a surface thick enough to prevent air to get to the fin it starts being risky.

You would be amazed if you knew how it looks sometimes.

It has a lot to do with what bar oil is used. I know it sounds wieard, but some oil create a mist and when this is sucked in along with air a sticky surface attract a lot of crap.

A guy here has specified on the bill how much time and at what rate he clean on... After a couple tries, they come with clean (sort of) saws. That is his way of making a point. But it does not help in them understanding the benefits of cleaning.

Scoring is the most common problem. Cracks in cylinders, case, intake, exoust. Melted covers and all other plastics you can think of. Wandering bearings, locked bearings. Gaskets and seals that change shape and form as meterial is changing shape and form... The list go on for ever...

Most common problem that heat cause is scoring on piston and cylinder. As material heat up they expand and different materials expand differently. If you run a saw hot and shut it of the piston will continue to expand or keep its expansion longer as there is no air flow cooling it. Same thing...

I thought this might be a good place to address this as many here run smaller saws and often go close to limit or above of what they can handle or more correct are designed to handle. I thought we could talk a bit of why they get hot, how to prevent it and what happens as it heat up too much...