The ratio depends more on the oil than it does the equipment. I run
everything I have on marine 2 stroke oil at 50:1. We have a jetski so
we buy oil by the gallon. I've been doing it fo years and haven't had
a problem. My chainsaw is 30 years old. I've got a lawnboy that is
20 years old.
I also ran about 50 gallons a week of 50:1 mix gas through about 30
pieces of equipment, for almost 2 years. (That's a lot of gas and oil)
Using only quicksilver oil mix. THEN the stihl guy caught wind of it
and advised us that any lubrication based warranty claims we might have
could be denied, so i switched to the stihl oil.
remove the "not" from my address to email
Th stihl guy is lying to you. There are consumer protection laws that
prevent any manufacturer from voiding a warranty claim as long as you
have used oil that meets or exceeds the equipment requirement. No
matter who made the oil. You can use the walmart oil and they can't
do a thing about it.
Look at the Quicksilver PWC oil. It is certified for air-cooled and not
water cooled. It's expensive; I think it's about $9 a quart at Walmart.
I haven't bought it because I'm still working on a bottle of Castrol
replying to Steve Barker, Bubba wrote:
He lied to you then. Im gold certified...he cannot tell you that BY LAW. If the
mix , meets, or exceeds the required jaso rating...they have to honor it.
Federal law says so.
On Fri, 17 Jun 2011 04:51:18 -0700 (PDT), jamesgangnc
But using oil for a water cooled 2 stroke in a highly stressed air
cooled engine is NOT recommended (generally) and MAY require a
different mixture. Some, but not all "outboard motor oil" is suitable
and meets the JASO M345 FD spec.
If it only meets tc/w3 it is not recommended for, for instance, chain
saw use. JASO M345 Fd severely limits engine deposits and reduces
smoke, as well as requiring minimum lubricity levels etc.
replying to jamesgangnc, Bubba wrote:
You most definitely havent been using 50:1 marine mix in your chainsaw....older
chainsaws require more oil mix, and not marine mix.
My 35 years as strictly a two cycle tech, calls you on your bs.
replying to jamesgangnc, Cory wrote:
I know this post about 5 years old BUT.. this is the best reply on this page
that i have read... A very common misconception is this... engines do not have a
ratio. It's the oil that has a ratio.
4 out of 5 of those references are accurate. The one that is not is
the one from Bubba the BassFisher.
As far as the one about not using more than recommended, it is only
accurate if using the correct oil. If NOT using the correct oil, more
oil may provide close to the same protection as using the right amount
of the right oil. - but it IS true.
As for not using synthetic 2 stroke oil, it is also accurate -
particularly with a simple port timed 2 stroke. A rotary valve or Rave
valve 2 stroke is more of a sealed system when shut down, suffering
less from moisture and corrosion issues - the ideal may be to use a
semi synthetic - just enough "real" oil to provide some anti-corrosion
protection, while most of the lubrication is provided by the
On a $99 weedeater I wouldnt worry too much about it, but on an $8000
Rotax aircraft engine Iwould pay heed to their warnings.
The problem with Bubba the Bassfisher's assertion that oil increases
the octane rating is that it is just plane WRONG (hey, don't take my
word for it - Echo, and Rotax - MAJOR manufacturers of 2 stroke
It's not just plug fouling - it is also carbon build-up.
In Burkina Faso (and many other African countries) they run the oil
mix extra strong on their mopeds to keep them from seizing up in the
heat - wevery month or so it's pop off the cyl head and scrape the
carbon off the head, piston, and ports with a wooden stick..
Smoke like a fiend!!!
Generally they re-use the head gasket - quite often they make their
own replacement out of sheet copper, and anneal it every couple times
they take it off - just throw it on the fire, pull it out and quench
Many of the Mopeds running around in Ougedougou and other cities are
OLD colonial era units - Solex, Peugeot, Motobecane, Mobylette? etc
from the early to mid sixties. Then there are the later Hondas etc and
the new Tomy and other Chinese units. Many of the old ones have very
little paint left on them - sun-bleached and worn to a fine patina.
That's also a maintenance requirement (every 30 hours of run-time, IIRC)
for the B&S engine in my mower. The head gaskets seem designed to be
reusable, at least to a certain extent. I expect it might be a
requirement for a lot of yard equipment, but nobody ever bothers :-)
On Thu, 16 Jun 2011 12:59:09 +0000 (UTC), Jules Richardson
I've pulled the head oftermore like 60 hours and not enough carbon to
worry about on both Tecumseh and Briggs engines with unleaded gas.
Bach when gas was leaded it was a different situation -
lead/ash/carbon deposits were sizeable and HARD.
On Thu, 16 Jun 2011 21:14:14 -0400, email@example.com wrote:
Interestingly, the local tool shed strongly advises 89 or 91 AKI (octane
rating) of not more than 10% ethanol (which, here in California, is almost
impossible not to use).
I'm not sure why they are so strong about not using 87 AKI with the
When I asked them about the 40:1 and 50:1 ratios, they tried to sell me
this 'stuff' in a can which they say lasts forever and has the oil and gas
already mixed (so they were of no real use).
I trust you guys - 'cuz you're not making money off of me - and I can trust
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