I have a Ryobi weedeater that take a 32:1 mixture ratio. I just got a
Poulan blower that takes 40:1.
I am trying to avoid keeping two different mixtures and gas cans. Can
I compromise between the two and do 36:1.
Anyone got any suggestions or other ideas?
As Ed P said, but motors are motors no magic here to warrant leaner
mixes. 32-1 lubricates, leaner ratios are more an apeasement of Ca
pollution rules as 2 strokes are being faised out in many areas. Your
Poulan may not run as well needing carb adjustment. For longest life use
synthetic at 32-1 for everything.
Another thing to remember is that if you are using a one gallon can to
mix and store the fuel, make sure it is empty each time you refill it.
Years ago, we had a boat that took a 24:1 mix. It had 6 gallon tanks,
and my Dad would run about 4 gallons out of it, then dump in a qt. of
oil and top it off with gas. After doing this enough times, we ended up
with about 10:1 mix. Larry
The smaller number 32:1 is more oil.
More oil will not hurt a two stroke engine. (aside from possibly fouling the
spark plug sooner). Less oil might fail to lubricate, and sieze up the
My suggestion is to run 32:1 in both engines. Four ounces of oil per galon
That works for large values of 10 :-)
If he started with 24:1, the initial 6 gallons of mix would have
contained 6/24 = 0.25 gallons of oil with a 6/0.25 = 24:1 ratio.
After removing 4 gallons of mix, there is 2/6(0.25) = 0.083 g of oil in
the tank. After adding a quart, we have 0.33 gal of oil, with a 6/0.33
= 18:1 ratio...
20 FOR I = 1 TO 10
40 PRINT I,OIL,RATIO
70 NEXT I
fill oil in gas/oil
# tank (g) ratio
1 .25 24
2 .3333334 18
3 .3611111 16.61539
4 .3703704 16.2
5 .3734568 16.06612
6 .3744856 16.02198
7 .3748286 16.00732
8 .3749429 16.00244
9 .374981 16.00081
10 .3749937 16.00027
Red , to Rich and it runs cooler less oxygen, lean is hotter more
oxygen, running richer gives more lubrication and cooler temps. Get your
self a 15$ infrared thermometer at Radio shack and see. RC motors are my
hobby, to lean will melt the motor....If you foul use a hotter range
plug usualy an order item. All plugs are temp rated.
A 2 stroke is a 2 stroke size is irrelevant Running cooler will not hurt
a 2 stroke or decrease its life it will increase it due to more
lubrication from more oil. This is relevant to oil gas mix, more oil longer life. I can even site where Evinrude upped the oil amount in
their recommended mix years ago after major early failures. Failures
brought on by their attempted EPA appeasement to lower pollution. This
EPA appeasement has led to many manufacturers lowering oil ratios for CA
EPA requirements, and we all pay with less engine life. You want it to
last, use synthetic at 32-1 or even a greater oil mix, plug fouls, get a
hotter plug. Did you notice Lawn Boy has no more 2 strokes. Why, the
I had a repair guy tell me to pretty much use 32:1 or something close for
everything. Better to be a bit light on the oil instead of too much oil which
seriously fouls everything up. (light would be a bigger first #). probably
3-3.5 oz of oil per gallon of gas (that's about 35-40:1)
"Living on Earth is expensive, but it does include
a free trip around the Sun every year."
On Tue, 29 Mar 2005 13:53:46 -0600, email@example.com (m Ransley) wrote:
Too rich will cause the engine to run at the wrong temp. That will greatly
shorten the time between rebuilds. Too rich is no better for the engine than too
lean. In either direction, it's a mater of degree. For best and most economical
use, follow the manufacturers directions.
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