Try a different brand of gasoline. At my part of the world, Mobil and Hess
are good quality fuel. Years ago, I had some Kwik Fill gasoline that simply
would not start and run, in small engines. Mobil fired up, and ran fine.
Same 87 octane.
At 1:50 mix the engine is indeed sensitive to a rich mix. Took me a
long time and a lot of frustration to figure that out. Then once hot
and it stalls it would never start again until the engine is allowed
to cool. I even dismantled the whole engine to try to figure out why
it was so hard to start. Having eliminated every possible cause I
figured out it must be the fuel oil mix as in actually measuring the
stuff instead of winging it. That fixed the problem.
Just dump in about 1/50th of a tank and fill with gas.
You should err on the generous side with the oil. Too much oil and you put
the planet in peril with white smoke. Too little oil and you prematurely age
You don't have to be "space shuttle" accurate, but you should try to
be pretty darn close, and, as mentioned, if any, err on side of too
To make it simple for me, I went down years ago and bought a 2.6 oz.
bottle of Stihl oil at the Stihl dealer for some really high price. I
also bought a gallon of 2-cycle Stihl oil.
I've kept the 2.6 oz bottle around for years, refill it from the
gallon bottle with a turkey baster (makes for GOOD turkey at
Thanksgiving...). So, for the past 15 years or so, I fill the 2.6 oz
bottle from a gallon bottle of oil. Dump it into the gas can. REFILL
the 2.6 oz bottle. Put away the gallon and the filled 2.6 oz bottle.
Head for the gas station. Only have to mess with filling every other
Get your own measuring cup!..............................LOL
Should be able to get one at the dollar store or the flea market cheap.
Either that, or fill SWMBO's measuring cup with a little better than 2.5 OZ
of water, pour that in a cup, and mark the level it's at.
You now have your measuring cup.
You can always buy the bottles of oil but if you have landscapers
working in the neighborhood see if they have a few empty bottles on
the truck. I managed to collect quite a few and I just refill them
from a bulk container. Then I can just dump one in when I am mixing up
gas. I keep a couple in my chain saw box and a few more with my string
trimmer supplies. I use TCW-3 oil and my machines seem very happy.
I went to the drug store and bought a syringe that is used for giving medication
to youngsters. They also make a large rubber bulb dropper like a turkey baster,
only smaller, that has measurements on it for the same purpose. I put a little
over two teaspoons in an old two cup (pint) measure from the dollar store that
I keep in the garage just for this purpose. This fills the tank when mixed.
Two "heaping" teaspoons to one pint of gas for 50/1 mixture. Then I only
need one gas can with regular gas that can also be used in mowers that
don't require the mixing.
Then there isn't a chance of putting the wrong mix in any engines.
The gasoline is refreshed more often this way. I also dump the trimmer gas into
the chain saw through a coffee filter to keep fresh two cycle mixture from
going bad or gumming up the small carburetors on two cycle equipment.
One way or the other I use up as much of the two cycle mixture as quickly
as possible so it doesn't go bad. I never add the two cycle mix to a mower
that doesn't require a gas/oil mixture because it lowers the octane
enough to cause ping/knock even if you aren't able to hear it.
Baby bottle from the dollar store, marked in ounces.
Use more oil, won't hurt anything. I use 4 oz per galon for my chainsaw, and
weed whacker. In your case, 3 or 4 ounces of oil per galon will work fine.
I use a larger size prescription bottle..or small yogurt 4OZ tub..whatever
is handy that holds 3-4 oz.
Measure 2.5 oz water in her measuring cup..pour it into the bottle or tub
and mark the line with a black felt marker.
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