I've been considering getting myself a new trimmer as my old one is
getting harder to start by the year, and has been difficult since day
one. The carb heas been rebuilt about every 2 years and I always use
The Ryobi 4 stroke really has my attention. 2 stroke engines and I do
not have a good long-term relationship, while I have 4 strokes that
are half as old as I am that just keep going, and going, and going.
I don't recommend 4 stroke for any tool powered by a small engine.
Supplied with a fresh oil/gas mix a 2 stroke life expectancy is measured
in decades. I own Echo brand lawn tools some going back 15 or more years
that have not had as much as a spark plug change. Oil and gas isn't hard
to mix. I'm using a synthetic oil at 100:1 ratio for all my 2 stroke
small engines regardless of their ratio requirements based on non-
synthetic oil. They vary from 32:1 to 50:1. Most problems with small
engine tools are carburetor oriented. If you keep the gas fresh and
use a synthetic oil that contains a stabilizer like Stihl's, you won't
have any problems if you buy a quality built tool like an Echo or a Stihl.
No, the information you pointed me to was about an engine with "four
transfer ports" THAT is not a 4 stroke engine. The one you have may
well be. Now it is possible their "low emission" engine IS a f stroke,
but nowhere does it differentiate and/or say so - and IF yiours is a 4
stroke, I very much doubt it uses pre-mixed fuel..
The info you pointed me to says nothing about the fuel used either.
On 4/3/2011 2:20 PM, firstname.lastname@example.org wrote:
Well please accept my apologies. APPARENTLY, they've (without my
permission <G> ) quit using the 4-mix engines on the string trimmers.
You now have to go to the brush cutters or the KOMBI system to get the
4-mix. I've got a FS-110 with the 4-mix myself and so do both my sons.
I rekon they discontinued those.
remove the "not" from my address to email
After doing a search on "4 mix" I found info on the engine. It has
the advantages of a 4 stroke except it still has part of the
disadvantage of the 2 stroke - higher than ideal emissions. Yes, lower
than a 2 stroke because it does not depend on purging mixture to run -
so at lower power settings it is not pumping raw fuel through - does
it meet C.A.R.B. requirements?????
I have a Troy-Bilt four stroke trimmer and it has a separate oil
container (no mixing).
It is quieter and smokes less, but the difference on noise is not that
much (I still wear ear muffs when I operate it).
This is my first (and probably last) gas-trimmer so I can't make
comparisons with two-stroke models. I can only say that I despise this
unit. Heavy, loud, hard to control. I much prefered dealing with a cord
Electric is fine for a small area, but I have over an acre and would have
to have close to 300 feet of extension.
As far as a 4 stroke smoking less than a 2 stroke. A 2 stroke should not
smoke if the ratio of oil to gas, and the correct oil is used.
The new lithium powered cordless work well enough that a big area can be
weeded with just one charge. My neighbor uses a Worx GT 2-in-1 and it
does a great job. If I didn't have 2 Echo trimmers, one straight shaft and
one bent shaft, I'd probably buy a Worx.
Using synthetic @ 100:1 mix none of my tools smoke. The old organic crap
like Lawn Boy sells will smoke at a 32:1 mix. That's just one advantage
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