is STIHL the only one doing 4-mix and how does that make more power than 2-stroke?

[lehman live edge slab]

I doubt anyone wants to come out with chainsaws or more products using "4mix" type technology. When 4mixes were released Stihl claimed they HAD to develop the technology because it was going to be impossible to produce 2 strokes that met emission standards. The 4 mix machines are substantially heavier, more complicated and require more maintenance than comparable 2 strokes and Stihl lost significant market share when they were introduced.
Not a path most companies want to follow.

That’s ok that you don’t like them but lots do like them and actually like the torque they have on a weed trimmer or brush cutter. I have a pole saw with one and dad is still running a br 600 that he bought first year out. Should adjust valves on the br 600 but haven’t and starts/runs great still. If they lost a ton of market share they must have had all of it before because I don’t think they’re hurting in the blower/trimmer market.

 

[EFSM]

They first referred to such engines as C4, then as H4 (Hybrid 4). After the merger with Kioritz, such equipment rather disappeared from the market. What's left is their partially working website dedicated to this technology.

Actually, Echo just revived this with their new 5810 blowers. They are a real powerhouse compared to the 580, which they replace and were no slouch themselves.

 

[el33t]

Actually, Echo just revived this with their new 5810 blowers. They are a real powerhouse compared to the 580, which they replace and were no slouch themselves.

They did! MSRP is surprisingly low compared to 2-stroke models.

 

[lehman live edge slab]

They did! MSRP is surprisingly low compared to 2-stroke models.

Apparently Stihl isn’t the only one that thinks it’s still good

 

[el33t]

Apparently Stihl isn’t the only one that thinks it’s still good

I wonder why they withdrew these products and are now coming back with them. Maybe it was about some intellectual property issues after the merger.

 

[TheWizard]

I use my km130 with a pole saw, it cuts good lots of torque. But couldnt run a chain saw with a 4mix engine, it just wouldnt sound right, feel right or cut right. Put the pole saw against a 200t with same size bar and chain and you really cant compare it.

 

[EchoShindaiwaMakitaDolmar]

They're not 4 Mix, but for what it's worth; Makita has/had real 4 stroke blowers and trimmers/power heads. No mix oil required.
I have one of the multi tool power heads myself, and it does just fine. May be picking up a 4 stroke blower soon as well.
They make absolutely no sense, but that's kind of the fun of them.

I think I may have read something about the Makita mm4 equipment not working right when held at certain angles, but I have no idea if it's true?

 

[SOS Ridgerider]

I think I may have read something about the Makita mm4 equipment not working right when held at certain angles, but I have no idea if it's true?

I've held mine upside down, and at every angle you can think of. Runs just fine.

Where it doesn't make any sense is for the professional using multiple different tools every day. Having all 2 stroke equipment, and a couple of other units that need their own gas can, is a recipe for disaster. Especially on a bigger crew. You're likely going to grab the wrong can at some point. Obviously by mistake, but that doesn't fix anything.

 

[hacskaroly]

Obviously by mistake, but that doesn't fix anything.

It happens all the time, especially if there is a can of 2 stroke and a can of regular gas on the job. Very high chance some 2 stroke will end up with straight gas in it and subsequently a scored piston at the least.

 

[whitesnake]

I have a Honda UMC435 with most of the Honda atttachments. It’s lower HP but it does have good torque. I change the crankcase oil once a year and it runs like great, now 7 years old. Once in a while I add a little 2 stroke oil to the fuel and it still doesn’t smoke. https://www.acmetools.com/honda-versattach-multi-tool-umc435laat/786102005630.html

If I remember right Husky makes a power head that has a Honda 4 stroke engine on it.