ORIGINAL: captinjohn

Zippi & friends, below is a photo of sparkplugs that will work in a DLE30. The CM6 is said to be best, but others like the stock plug. I guess what works for you in this case is OK! Zippi, take your choise of which plug you want....I will send it with what I owe you monday. Best Regards Capt,n

ORIGINAL: craigteffe

I bought 2 of these engines from Ralph Cunningham One for me and the other for a friend, He has his mounted and when you go to pick the plane up the RPM changes or the engine dies. Anybody run into this issue before? We have the high end set for peak RPM and the low end for good transition We can seem to tune it out but then the engine stubles real bad when you advance the throttle. We have it mounted on a Sig Mayham with no cowl. He is going to mount my engine and she how it works. He has replumbed everything, I told him to try a regular style clunk because a few have said the filter clunks have solved thier issue.

ORIGINAL: captinjohn


Ask Ralph C.

ORIGINAL: craigteffe



I posted this over on his site but wanted to post it here so people could give some feedback.

I bought 2 DL 30's about a week or two ago, My friend has one and I have the other. We are having some trouble with them and would like some help. Here is what is happening, Engine is mounted inverted without cowl and when started and warmed up we tuned for max RPM on high end and adjusted the low end for good transition. When you pick the plane up and turn it slightly where the carb is angled up and then level the plane back out the engine dies, you can also shake the plane slightly and it dies, (Throttle setting at idle or 2 clicks above idle). We have replumed the tank and replaced the fuel line, removed the felt clunk and installed a regular clunk, installed a nipple on the diaphram cover and run a line to the inside of the plane, rotated the carb, hooked the battery directly to the iginition, tryed another ignition module, tryed another carb, tryed a carb off of a G26, tryed a velocity stack, mounted another Dl 30 engine on his plane and it does the same thing. We tryed one thing at a time before trying something else. We orignally found this problem when lifting the plane off of our flight stands to place on taxie way. The engines only do this at 2 clicks above idle or below they run great above that throttle setting.

Did you put the diaphragm line into a container? I put mine into a 35mm container. I engine use to want to quit when I moved it off the starting table. After doing that mod and tuning the motor it has not done it since. I am having an idle issue but it probably just needs more tweaking.

Anybody else with these engines could you please try your planes at idle or 2 clicks above rotate the plane around and see if this happens to you and post back here.

Thanks for any and all help!!!

ORIGINAL: qspilotcmh

Thanks for everyones advice. I added a fitting off the diaphragm and ran it into a 35mm film container. It really helped with my inflight issue. I then added a velocity stack Jody sent me and it seems even better. I have zero midrange issue and no changes in rpms while doing maneuvers.

The only problem I am having is with the idle. In order for it to idle at 1800 it will start below 1800 on the edge of quiting and then advance to 1800. If I add on click of trim it jumps too 200 rpms. It seems very touchy. Inflight I have the throttle trim up 4 clicks so it's not an issue, but it makes landings tricky. Sometimes I can get the idle just right and it comes in for a smooth landing. Other times its too fast and I go around. Sometimes just after I land the motor quits.

You think it's the lowend? It's perfect in flight. The plane has been hard to start if that helps. I have been using my starter for the first start of the day. I have 3 gallons through it and am running Stihl Ultra @ 45:1.

ORIGINAL: qspilotcmh

Did you put in diaphragm line into a container? Mine used to want to quit when I took it off the table. I did this mod into a 35mm film container, retuned it, and it's been fine. I still have a strange idle, but it's does not change when moving the plane. Mine wants to quit after landing but only when I get the idle low so landing is easier.

ORIGINAL: nonstoprc

Could be because of the engines not break-in yet. Some of DX50s do the same.

ORIGINAL: qspilotcmh

That's what I was thinking as well. I'll try moving it a tick rich tomoorrow.

If I remember right if the idle increases your lean and if it lowers your rich on the lowend. Does that sound correct?