I have a DLE55 which runs rough up to half power with a four stroking sound then smoothes out nicely after half power with the normal two stroke sound.
I have tried leaning the Low-Speed needle in very small amounts up to 1/2 turn which was to lean and the motor cut.
I have also tried richening the Low-Speed needle but this made the engine hesitate on opening the throttle.
I have know set the needles to the original position of 1 1/8 turns (Low-Speed needle) & 1 5/8 turns (High-Speed needle) and the problem remains.
It is also sometimes refuses to start and then floods, after removing the plug and drying it starts straight away.
I also checked that all the bolts & screws are tight.
It has had four gallons through it and is now on 45:1 Belray, also using 23x8 Mejzlik.

Many thanks in advance for any advice you may have.

Sounds about right. That's the way they are.

Check the plug, if original you're lucky. Get an NGK-CM6. Check the timing.

Have always used a NGK-CM6 plug but have never adjusted the timing, it is currently set in the middle of its adjustment.
Will give it a try, many thanks.

you can get rid of some of that roughness... make sure the planes is restrained, have someone help you....

turn on the engine, and throttle it up to where it starts to 4 stroke.... leave it at that throttle position, and lean out the low end carefully

You will never be able to get all the mid range burble out of it.


Get the low and high speed correct and let the burble take care of itself.

It sounds like the metering needle is stuck. If it is then fuel will be dripping out the carb while not running. You tell us, is it dripping?

Hi guys,

I have the same engine and basically the same complaint. I get it to run nicely on the ground but once in the air doing 3D it burbles some at lower throttle settings. It also doensn't idle well below about 1800 RPM. However, it has never deadsticked once in the first 3 gallons. I just want a super clean transition and can't get it.

So, is this just the way they run? Is the solution a DA 50 or 60 or do I need to put a nipple on the diaphram plate and vent it in the fues to avoid air pressure changes. I've read that might help.

Thx

Oh, no gas leaks here.

I recommend to adjust timing also while running.Be very careful.Did you adjust plug gap?

I did the gap on mine.

Can someone give me the rundown on the best way to adjust the timing. Is this a can of worms or something that is easy to do?

What improvement would you expect by adjusting the timing.

Also, how about venting the diaphram plate hole to the fues. I read that that can help too.

The factory timing setting is with the sensor centered over the casting seam

Timing isn't hard , and there is plenty of info out there on how to do it. My recommendation is to get the RCEXL timing tools and use them. It can easily be done with the spark plug, but I just like the gadgets. It is easier to watch the LED go out than to listen to or watch the plug for the snap.

OK. But it timing normally an adjustment that helps mid range transition clean up. What is a timing adjustment really going to do?

I've just never done one.

Best thing to do is leave the sensor aligned on the center of the casting seam and open your spark plug gap up to .024"

Tried this an made some improvement, it now runs smoothly from 1/3 throttle onwards also checked for fuel dripping from carb but there is none.
I had already vented the diaphragm plate hole into the fuz from new.

Thanks for all these ideas, I will try the timing next.

My method of timing is, slightly loosening of 2 hold screw of sensor and at full throttle run, sliding the sensor to both sides slightly.Just like HSN, it gains a max RPM at one point and loose RPM s at both side of this point.Voila.Stop the engine without change and tighten the both screws to hold sensor that certain place.BE VERY CAREFUL.

What it does is advance it a bit to fire sooner it may help burn off a bit of fuel. We advance are small and big block chevy's a bit to help run a bit better.

I don't know if it was mentioned,but take an xacto knife before moving the sensor and scribe a line on both sides,so you can get back to where it was set incase it does nothing for your problem.