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Help with dle30

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Help with dle30

Old 12-31-2015, 10:48 AM
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Default Help with dle30

Hey guys so i can't seem to find "engines" in the sub forum so I posted here. I know there are hundreds of threads on how to tune this engine and beleive me I have searched and searched. Lots of things I find are very contradicting including the manual, claims if it stumbles to close the low, the next sentence says if it stumbles to open the high. So far the best thread I've seen is here


So I'm on my 6th gallon through this thing and it's gotta be very close, I have only been making very small adjustments every few times I go flying. According to the thread above claims that if you run it wide open and chop it back to idle it should go back to a steady idle, mine would go very low and work its way back up. I flew it like this for a very long time, until the other day I decided to follow this thread and lean the high just a touch, now it comes back to a pretty safe idle, and if I bump the throttle just a touch after doing this it then goes to a lower idle which is steady but lower.

It also stumbles a little when punching it but I don't want to continue chasing in circles without knowing exactly what it needs. I feel it's a pretty safe tune and have never seen a deadstick, I did however mess up the ignition wire and swapped it out with my ignition from my dle55, don't know if it effects the tune or if I should continue to tweak until I get the ignition fixed.
Old 12-31-2015, 11:15 AM
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It's really difficult to diagnose engine issues without actually seeing it. A few things associated with DLE engines that you may want to check. First is to replace the plug with a genuine NGK cm6 gapped to .020-.022. Make darned sure the plug cap is fully seated. Check to make sure the surface of the reed cage that the reeds seat up against are perfectly flat. Check the timing, I have read countless times about DLE engines having the timing off from the factory. The timing should be 28-30 degrees BTDC. IMO a good filter just prior to the carb is a must. Some guys will argue and give all sorts of justification to as why they don't run a filter on the airplane but bottom line is that is almost 20 years of running gassers I have never experience a failure related to using a filter, I have seen dozens of failures due to dirty carbs. The next is your fuel mix. For that engine a mix of 32:1 of just about any good quality AIR COOLED oil mixed with 87 octane is going to be the ticket.

As far as tuning goes, I usually set the high needle for close to peak RPM then come back and lean down the low just to the point that it won't transition out of idle, then open it just enough to get the transition back. This works well as a base ground tune. From there I listen to what it's doing in the air and adjust from there. As always you will get conflicting information, just weed through it and keep in mind where the information is coming from.
Old 01-01-2016, 04:35 AM
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Here's a link to the gas engine forum. http://www.rcuniverse.com/forum/gas-engines-142/
Old 01-04-2016, 06:00 AM
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Thanx guys don't know why I couldn't find the gas section, it's just not there under sub forums.

Anyway the dle is running pretty good, it's very close so I don't want to start from scratch again. If i pull a sharp turn or snap on the plane the motor kind of bogs Down, as well as the symptoms I mentioned earlier with the idle. Is that from being to rich? Do I turn the low or high?

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