Got a guy who's trying to give me a 12hp riding mower. He says it mows
great and runs good. Smokes a little on startup.
What am I likely facing here? Seems I recall dimly that smoking on startup
can mean rings worn and/or valve guides. Chances are I can mow quite some
time with it before I have to do anything. Just curious.
The best indicator of 'too' much oil burning is frequent fouling of the
spark plug.. If it starts getting hard to start, pull the plug, clean it,
then make a mental note of how long before you have to do it again
(irregardless of how much oil you have added).
Another cause of oil burning in a one cylinder engine the crankcase
breather.. The single cylinder will cause air to be expelled on each down
stroke and the oil breather my bring oil out and into the carborator intake
(PVC). Two cylinder engines don't have this problem because one cylinder is
up while the other is down, hence no crankcase pressure pulses.
what kind of dipshit would give advice like that???? Holy Christ!!
tow stroke is way too thin to provide bearing protection in a four stroke...
fix it right or just don't fix it.
and don't listen to stormin mormon.... hey they name says itall.
Stormin, 2-stroke oil is the worst thing you can put in a crankcase,
its designed as a combustion product and will cause him to consume more
oil as its viscosity is less then crankcase oil. It also has totaly
different ratings and parameters for protection. Which could ruin his
He should try a tune up . A compression test without and with adding
oil to the cilinder , to determine if its valves or rings, and how low
it truely is. Thicker oil, one designed to expand valve seals. And a
hotter spark plug. ,may cure the problem. What grade oil and heat
range of plug only experimentation will decide.
Actualy OP said smoke on startup. That indicates valve guides , and in
itself is not a bad thing, as it gives instant lubricaton on startup ,
when it is needed most. Some new oils are advertised to swell seals.
Another person recomended the breather, another interesting idea to be
2 stroke in a crankcase, well when I was 10 yrs old I did something
dumb , put vegetable oil in the mower.
If you take two cycle oil and mix it 32:1 with gasoline, it does lubricate
air cooled "twostroke" engines.
The major difference is that two stroke doesn't have the detergents and
multiviscosity chemicals like multi weight oils.
I have less confidence, generally, in the advice of people who call names
instead of giving substantial advice.
Christopher A. Young
Jesus: The Reason for the Season
Call Names , Grow up Stormin you Wimp, I have No confidence in people
that give Wrong information , thats you Stormy.
No manufacturer will endorse a warranty if you state you used 2 stroke
in a 4 stroke. Call around if you dont beleive me.
Yes 2 stroke doesnt have the Viscosity, detergents, Additives, and
viscosity stabilisers, you admit its different but say its OK. Dumb.
As i said diagnosis is first, and valve seals seem relavent here, and
there are Oils made to swell seals.
Your way does not address the problem , you avoid a diagnosis and
recomend a hack way that will lead to premature engine failure.
Fouled plugs and carbon buildup due to a lower viscosity increasing
Blowby, are also going to occur. Try it in your van and let us know how
it works bozo.
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