I have 40:1 and 50:1 two-stroke tools - which I'm inclined to use the same
fuel for all of them.
What do you do given some two-stroke tools are 40:1 while others are 50:1?
a) Do you maintain two separate gas cans?
b) Do you make it 45:1 for all of them?
c) Do you use 40:1 or 50:1 for all of them?
Note: Tools are chainsaw, hedge trimmer, weed whacker, air blower, etc.
How critical is the exact oil:gasoline ratio anyway?
replying to Steve Barker, Bubba wrote:
It wont hurt using ONE tank that much. Using fuel that isn't the same ratio will
harm the unit. It will carbon up and rings will stick, exhaust will get clogged
and the combustion chamber will be full of carbon. 35 years as a factory tech
for stihl( gold) ,echo, husqvarna and a master OPE TECH.
Not a good idea.
I would probably use 50:1 in all of them, and make sure it was really
really good oil. Echo or Stihl brand chainsaw oil, or maybe Quicksilver
synthetic PWC oil.
For 2-cycle tools that I don't use very often, I've starting mixing fuel
in a 500ml pop bottle and measure the oil with a syringe. One tank of
fuel for most small engines. If you do the same you could custom mix it
for each tool.
More oil is better for engine life but many engines run poorly at
richer oil mixes. I have a 1984 lawnboy designed for 32-1 and I run
synthetic at maybe 40 to 46 - 1. Id say use a good synthetic and see
how they run and try one mix
On Wed, 15 Jun 2011 18:08:27 -0500, zxcvbob wrote:
Yes, I've got a straight-sided jug that I use to do the same, which I
marked off for the tank capacities of different tools. Good tip on the
syringe; for the oil I've got a little marked-off cup thing which I think
came from a tub of laundry cleaner, but the syringe would probably work
I think for 50:1 v 40:1 it's "close enough" that it wouldn't matter using
the same mix, but I've got a little tiller which likes a lot of oil and
runs on 24:1.
On Thu, 16 Jun 2011 01:41:12 +0000 (UTC), Jules Richardson wrote:
Thanks for that tip, on top of Bob's suggestion.
I see if I get the right sized jug, I can mark it for the capacity of each
tool, and, ad hoc, mix the oil and gas at the time of fill.
Of course, that's a problem with partial fills.
So, I would have to do a behavioral modification (full fills only allowed).
Yes, that's the main drawback. OTOH, I never know how much I'm going to
be using each tool each season, and I don't want leftover mixes sitting
around, so I just got into the habit of running them dry before re-
I suppose the jug could be marked for fractions of a tank, too, but
that's perhaps more trouble than it's worth :-)
replying to Jules Richardson, Bubba wrote:
You will burn up it up with your thinking.....its not designed to run with
'close enough' ratio fuel mix. Don't understand why folks want to shortcut stuff
...then it tears up. Then you bring it to me for warranty, and I know that you
haven't used the right ratio , when I go through it, and I tell you too bad, and
then you get mad. Be smart , not lazy. It will save you time nd aggravation.
The secret is to use good 50:1 oil. Never use an oil that is only
designed for 40:1 at 50:1 - and PWC oil is not necessarily acceptable,
at any ratio, for air cooled power tools. You want AIR COOLED two
stroke oil. (they run hotter than water cooled engines)
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