If it does this it is still just a "touch" rich but will not die on you and it will run nice and smooth.Ħ - How low should react. Adjustments on gas carbs are VERY small, like the width of a screwdriver blade or 1/16th of a turn or less.Ī good "safe" tuning on the low needle you should be able to clean it out with some run ups, return to idle and it should have a nice steady low idle for at least 15-20 seconds before it starts to load up. I have had to go as low as 1 3/8 on the low needle on the DLE carbs. Normal starting point on 100cc engines is 1.5L and 1.5H. Listen to the engine.how long does it take to start to "load up" or start to slow down in RPM? If it is rough right away you are likely way to rich. Now run the engine up to clean it out with a couple full throttle run ups and then go to to low idle. 1600 is too high to properly tune that low, it should be much closer to 1200.ĥ - Tune low needle first. Do not remove the black H and L screws obviously.ģ - Start the engine and run it for a good few minutes with varied throttle and some full throttle run ups to get it nice and warm.Ĥ - If you have not done so, adjust the servo travel for a consistent idle, does not need to be perfect as long as it is low. Take that screw OUT and deposit it in the trash can. it has a spring on it and it sets how low the low throttle arm will physically go down. This was describing a typical DLE tuning but the same applies to DA100 / 120 and pretty much all other 100cc class engines starting from a base point of 1.5H and 1.5Lġ - Tune the engine when it is warm, and double check the tune after a flight.Ģ - On the DLE there is a little silver screw on the carb that is an "idle set screw". I wanted to also post it here for those that may be new to gas engines and are having trouble with the local field "engine guy" not really knowing how to tune an engine. I took the time to write this up once a long time ago and recently posted it on another forum.
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