If they changed lawnboy to 50-1 its the same reason all manufacturers
are trying it, to reduce pollution to apease the EPA to forestall
banning of 2 strokes. This was undertaken in Ca becuse of their strict
Mine is 32-1 , there has been no new engine design adopted to warrant a
change, its pollution based-biased.
Evinrude years ago went to a leaner mix recommendation, then withdrew
it after commercial failures by the Coast Guard. So use a leaner mix,
and lean out engine life, didn`t you know there is no crankcase full of
oil in a 2 stroke. High heat, high RPM and you stretch the saftey limit
with less oil.
You have a motor that could last 1-2000hrs, what do they care if they
reduce it to 500. The average mower may only put on 250-500 in 10 yrs
anyway. Then they figure you buy another one, and they made the EPA
happy the 2 stroke can pollute less. 32-1 synthetic is best for long
life in a lawnboy.
If you foul up, tune it and use a hotter plug. Lawnbows are knows for
ignitions getting weak after 5 yrs, you need a new coil-ignition pack if
thats the case, a weak spark does cause fouling.
I had a Brtish Seagull outboard years ago that called for a 10 to one
mix. I have right now a "Neptune Mighty Mite" (2 hp!) from around 1960
that specifies a 16:1 mix. There have been a lot of improvements in
oil in 50-75 years that are largely responsible for the 50:1 ratio
becoming so common. There has been some improvement in engine
While there is little disagreement that modern oils allow an increase
in the ratio of gas to oil used in older engines, quantifying it is a
little more difficult. One recommendation I have seen suggested that
for the older engines, doubling the gas:oil ration up to a max of 50:1
would be OK. Seems reasonable to me and in any event implies that
rocket-science precision is unnecessary. Personally I stay close to
the original manufacturers spec regardless of the oil type, but I
don't spend a lot of time making sure it's 'exact'
Often wrong, never in doubt.
Larry Wasserman - Baltimore, Maryland - email@example.com
32-1 plugs exhaust ports!, thats the dumbest thing ive heard. I guess
Lawnboy-OEM know nothing about about 2 stroke boat and lawnmower
engines. You better tell them Steve, they need to know they have been
doing it all wrong for 50 years, and of course an improperly tuned or
operated motor would not affect burning and engine temps.
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