100:1 Mix

I agree with gearnut. With my new motors I just do the normal to increase air flow port matching and better air filter the adjust the e-clip to the leanest setting which is still rich with the opti, but leave it there for break in. Then after break in I really tune it. I also run it pretty hard during break-in so the extra richness helps protect it a little.
 
Given the length of this thread, I never would have imagined I had something to add that has not already been said. That is, until I stopped by a Tractor Supply Co. store today...

For everyone saying they cannot find Opti2 locally, TSC may be another option. In their mower / chainsaw / trimmer section they had little packets of 2-cycle oil that looked suspiciously like the 1.8oz opti packs. The label says "Arnold" brand universal 2-cycle lubricant, but the instructions are the same as opti (that is 1.8 oz pack into 1 gal). Also the back of the label says "manufactured for Arnold by Interlube International Inc." the makers of Opti.

Sounds like the same stuff to me.
 
Same here in Ga, I have tried it in my string trimmer and blower. It has a greenish blue color, is that opti-2?
 
This is interesting. I am a proponent of 2 stroke economy cars for America, and wonder if this could pave the way for them. I think something similar to the VW Bug would be a big hit right now (yes I know that is 4x engine, I mean something of a similar size, with a 2x simplified engine, going for a bare bones approach.)
I would love to have a small car with a very simple engine, no AC or electric windows and crap to mess up, just a eco-box with high fuel mileage.
 
suzuki made a 2 stroke jeep in the early 70's slow,smokey,small,and would out climb just about anything.
 
I know pablo, but I'm sure YOU of all people understand the value of being an intrepid experimenter :D.
 
dmb said:
suzuki made a 2 stroke jeep in the early 70's slow,smokey,small,and would out climb just about anything.
Click to expand...

It wasn't a Jeep. It was a 4X4 Suzuki. Sorry but I belong to a couple of Jeep clubs and they are for just Jeeps.

Terry
 
I tried reading this whole L-O-N-G thread! I didn't make it. :-(

I have a fairly new motor, less than 500 miles on it. I just checked the compression and got 80psi with one pull of the rope. What I was looking for is how the carb should be set up using the 100:1 mix. BTW, I have been using this mix.

Terry
 
If you have the NT carb and NO expansion chamber you will use less fuel than if you have an expansion chamber, so, I say, try the leanest condition, highest notch in the needle, and read your plug, then go from there. You may need to re-jet
 
MotorBicycleRacing said:
Which carb are you using?
What elevation are you at?

Before you start messing with the jet size.
what position do you have the clip on the needle?

First try raising the clip up one groove at a time to lean it out.
Click to expand...

If it's an NT carb try a 68, or 66. Stock is about a 70
 
Thanks guys! I guess I should have said everything was stock. I'll order a couple of new jets to have on hand just in case. In the mean time I'll try adjusting the needle.

Terry
 
Hi all

Here is my up date, I started with a new 66cc engine with opti 2 70:1 break in 2 tanks (1 gallon).
It ran like !@$%#@ 4 strokin all over its self. after 2 tanks i switched it 100:1 and it ran like real #$@#@#@##@#$@#@. so i order some number drills and solderer shut the jet and started working down in jet size. i am now at #73 .061mm and needle at 1 notch from the top and it runs a lot better still 4 strokin intermittently but i can live with it for a while. The plug still looks a little rich but closer.

my next drill smaller is #74 0.0225 in/0.572 mm to small i think so i will order a #60 jet. i think that will be about right. if i move the e clip to the top it falls off at top speed too lean. move the e clip to the the middle it 4 strokes more so i am getting close
 
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