8 or 9 tanks. The linkage is good on it. Based on today I think I have a serious problem. I took the time today to really focus on just getting it tunned with no luck. No matter which way I turned the needles the same thing would happen.

I tried every combination 1 hour at a time one at a time. It continues to make the same noise with the idle going high then going low and girgiling off throttle no matter what I do. In fact the more I got into it the worse it became.

Off throttle the only way I can explain the noise is like a high pitched girgiling noise that sounds like is blubering and its loud. Its not a normal noise and becomes worse when it hits operating temps. No matter what I did it didnt make better or worse but more worse. The noise sounds like a clunker of an engine.

At $360.00 I am pissed!!!!!!!!!!!!!!!!!!!! I havent done anything to cause this problem no serious crashes nor have over temped it.

I am stuck!!!!!!!!!!!

The motor is too lean, put it back to the factory settings and start over.

Do you have the factory settings. Didnt come with them in the box.

Dish, maybe your fuel is bad, and/or maybe your pipe is bad..Try different Pipe and new fuel

Email chad and he will give them to you, the motor is making that noise and has a high idle off throttle because it is starving for fuel.

Ok guys here is the new theory. Jaz mentioned this in my local thread and here is how I responded. What does everyone think of this theory!!!!!!

Quote:
Originally Posted by Jaz240
Try different fuel Dish, you may have a bad batch


How common is it to get a bad batch of fuel. I started thinking about this and here is what I have come up with. If you remember my first post when I started having problems I stated that the week before it was perfect during practice and had zero problems breaking it in and running it during a practice session.

I started having problems on race day two Saturdays ago and have had problems ever since. Two Saturdays ago is when I bought a brand new gallon of fuel. In fact I didnt even show up with the last gallon that I had becuase I used it all up during the practice that I had when it ran great.

Since the get go of this new gallon of fuel I have had problems. I also started thinking about my sons 1.0 during race day. I had his buggy set up perfect and it flammed out a couple of times during the races which never happend to me in the past before handing it down. I also had to play with his idle in between races as it was higher than normal. I also had to replace a glow plug in his that was fairly new. We were both using the same new gallon of fuel.

Jaz and everyone else, this could be it. I am hoping that this is the problem but questioning how often this could happen. I am going to order some stuff online to test it. If I buy another gallon from hobby town I could possibly run into the same problem if it is a bad batch. At least this is one other thing that I can eliminate if its not the problem.
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Bad fuel will make you pull your hair out, grab a new gallon(different batch or brand) and try that.

I think your motor is not broke in yet your probably getting close.It is typical for this motor to run erratic until it is broke in. The factory settings pertain to using Trinity Platinum 30% fuel so running Byrons they will be a little different but not a bad place to start. leave your high speed fat for now and work on the bottom to were you can idle and hit the throttle and it will still blow smoke but takes off and then flattens out from being too rich on top. Don't try to set your setting on the box you need to put the motor under a load to tune and then you can dial in at your track. After you run around get a little temp in it you should start with your bottom end first then work on the top. When the motor brakes in totally it will richen up and you will need to re tune and then it will hold a tune. Remember this motor .21 should not need to ever get above 200 deg f my motors run around 180-190 all the time don't try to tune by temp tune by sound you should always see a little smoke all the times. Motors that flame out when you hit the throttle normally are too lean not enough fuel for the motor it will flame out and too rich will fuel wash the plug and makes crackling noise and then stalls. Hope this will be some help.

racing head
 

I have no luck finding cooling head.( out of stock) .:( ....... Anybody using aftermarket or diff. brand cooling head?...

Thanks..

I know it was mentioned but have you checked the carb boot yet? pull the motor out and take the boot off and pull it over your finger and inspect. if you have a small pinhole tear/hole the motor does exactly what your describing. Without taking the boot off its hard to check for leaks, and when you put it back on seal it up with some engine sealant on both ends of the boot and zip tie the big end.

cheezy91, you can use a go tech carb boot if your in a pinch, just use some engine sealant on it and zip tie the big end, its a bit narrower on the big end and using the zip tie spreads it out a bit and works fine.I actually liked the go boot a little better than the stock cause its a better and thicker rubber and doesn't tear so easily.

smracer, got the head button today. Thanks a million.

Pinoy, try a Werks or other Sirio head with the same bolt pattern. I've heard they work. May not run just the same but should get you through till you can lay hands on another Extech head.

Thank you very much ... I will wait for Chad to reply e-mail till friday if not I will buy the sirio .21 head.

I have a used one that the extech is worn off $10.00 if you want it includes shipping.

Yes how can i pay you sir?

PM me please

You have a pm.