Hi all

My G26 has been flying well for the last 6-7liter of fuel. Total plus running in prolly 8-9liter. I have not touched the setting since it was tuned for good transition and top end for the current prop of 17x8 and its about 8100rpm (6-7 liter ago) I'm sure it have run in and gain some rpm. The respond is getting better and I can feel the power is getting more omph!

Do I need to re tuned the carb, and is it the same procedure? Hi needle first, then lo needle idle lean until no transition and then back to hi again? Or just the hi end needle?

Do you really need to change anything? If not then leave what's working well alone. You know the old saying, "if it ain't broke don't fix it". If you think that there is quite a bit more to be had then you will peak the high and check the low to see what effects the high may have had. Of couse you peak the high and back down a little. I usually peak the low and leave it there. If you believe that any gains will only be minimal I wouldn't bother with any changes.

WELL READ YOUR PLUGS IF BLACK ITS TOO RICH IF BROWNISH LEAVE EM YOU KNOW YOUR PLANE BETTER THAN US JUST LOOK IF UNSURE POST EM AND WE WILL COMMENT .
AND WHITISH TOO LEAN

reading the plugs is useful ONLY if done right, so you can't just fly the plane for a couple of flight then check your plug, doing so will only tell you part of the story. for example if your low needle is way to rich and your high needle is way to lean, your plug will be black as hell (because of your low needle) but you will be still out of tune and might blow up your engine because of being lean up top. the proper way to use the plug as a mean of checking your mixture (useful for tuning the high end only) is to put a brand new plug and go full throttle long enough to get some color on the plug, this usually happens in less than a minute of running if not a lot less. And then immediately kill the engine and check your plug (again I can't seem to see how you can tune your low end with the plug method), some people also chop the plug to get more accurate reading of the plug. This method is what I use to tune my Jetskei and my ATV. For planes, I guess it will be much easier and accurate to use the following method.

- use a tach to tune your high needle to the max RPM and back off a little (backing off by how much depends on a lot of things, but it's almost always a must that you don't tune for max RPM and leave it there, it will lean out in up lines and plus wouldn't you rather sacrifice a 100 or two RPM and be on the safe side than blowing up your engine)
- Some people also like to use a heat temp gun to check the heads temperature while doing the above. some also use EGT gauge.
- tune the low needle for the best transition.

u see how simple that is

Hope this helps