RE: MLD-28 gasoline engine (Full Version)

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prototype3a -> RE: MLD-28 gasoline engine (6/25/2012 1:02 AM)

The first MLD28cc I received was a dud and was replaced under warranty.  I've been so busy with work that it has taken me forever to get the replacement mounted and running.  Anyway, we got it going last weekend and it seemed to be running much better than the first engine I received.  Anyway....

What is the advantage to using the CM6 sparkplug over the stock plug?  What adapter is needed to make the conversion?

What spinners do you guys like for use with this engine?



rexbirk -> RE: MLD-28 gasoline engine (6/25/2012 3:08 PM)

I don't know of an advantage to the CM6 other than many of us use them in our 50cc engines so we only need to keep one type of plug on the shelf for spares. Since the CM6 plug is much shorter it does make getting the cowl on and off easier on my planes. I got my adapters from RCExtremepower.net



prototype3a -> RE: MLD-28 gasoline engine (6/26/2012 12:48 AM)

I saw that you got them from RCExtremepower.net but you didn't say what adapter is required.



rexbirk -> RE: MLD-28 gasoline engine (6/27/2012 5:18 PM)

14mm to 10mm adapter. You install it with Red Locktite.



rexbirk -> RE: MLD-28 gasoline engine (12/28/2012 10:13 PM)

This thread has been dead for 6 months, Was just thinking how much I like these engines after I got over the problems. With the RcExcel Ignitions my two MLD28's in my 3DHS 70" Slick and 72" Extra ran great all summer. What I like best is how smooth they are. Just finished a 71" 3DHS Slick with a PTE36 on it and even though the power level of that engine, plane combo is ballistic it has a much higher vibration level.

With the exception of my experience with the ignitions I love the MLD28. Even though the 2 planes with these engines do not have great hover pullout they are running well, are fairly quiet and have more than adequate power for me. Not to mention that they are a real bargain (assuming the ignition woes are over) I fly mine with 18-8 Vess props. Much quieter and smoother that the 18-6 in my opinion.



AA5BY -> RE: MLD-28 gasoline engine (12/28/2012 10:30 PM)

It is too bad that Melody was invested in their poor ignition. As you say, the engines run fine when given a good ignition. I've got a 28 though it has not yet been fitted to a plane. I am running a MLD-35 that I love, but only after changing the ignition to an RCexl. It starts easily cold or hot and has good power.

Most modelers will not be happy buying an engine to discover that they then need to spend $60 for an ignition that will work.



rexbirk -> RE: MLD-28 gasoline engine (12/29/2012 1:11 AM)

You are correct on that!



airborne2.4 -> RE: MLD-28 gasoline engine (12/29/2012 3:28 AM)


quote:

ORIGINAL: AA5BY

Most modelers will not be happy buying an engine to discover that they then need to spend $60 for an ignition that will work.


+1



3dsky -> RE: MLD-28 gasoline engine (12/29/2012 5:17 AM)

I am running two MLD 28’s and the 1st one has 100's of flights on the stock ignition turning a 18 X 10 XOAR The 2nd one had a bad ignition after one flight and I had to replace, $70 bucks later it is running great. Love the engines, but that was years before DLE was out. The market is full of great running engines in that size class. I had trouble getting service to replace the bad ignition since it took me a year to finish the plane. I could not even buy a new one …out of stock. I gave up on them. Sorry, but a distributer should stand behind their product when they have had problems. All the other vendors I deal with have great service so that is what determines where I spend my money. That ignition has had problems; no one is offering any solutions other than buy a different brand ignition. The only move was to lower the price.
The big problem changing the ignition was the difference in timing and getting a sensor bracket to bolt on and lineup. Was not a quick bolt on fix and I would not recommend going that route with a new engine. I always get comments how great my MLD’s start and idles and have good power…always get asked what engine is that. It’s funny that I have never run across anyone else running the MLD. My DLE 30 is a greater value.



lovefool -> RE: MLD-28 gasoline engine (12/29/2012 6:03 AM)

Does CERMARK support for MLD-28 in the north America?

I bought a replacement ignition for MLD-28 from SDSHOBBY, but they seems not carrying MLD ignitions anymore.
(I bought a ignition fro MLD-35 and CM-6 adapter instead)

Later I had found the original ignition was okay, just the carb setting was wrong.
The new one is still in a box, since my gasser is not ready yet. I gonna try to use new one later tho.

http://www.sdshobby.net/Wholesale-Discount-engines-accessories-cdi-ignition-accessrory_c2626.html



3dsky -> RE: MLD-28 gasoline engine (12/29/2012 6:35 AM)

Does CERMARK support for MLD-28 in the north America? Yes...That is where I got both engines.

My second MLD powered plane missed a summer flying season because of lack of support, at the end of the year I picked up a unit from Agape Racing and Hobby who I had asked about converting at Toledo show, they bent over backwards to send me the parts I needed to get the engine running..so I think Cermark did not do a good job supporting the engine they sell. This was 2 years ago and I would hope they have fixed the problem.



AA5BY -> RE: MLD-28 gasoline engine (12/29/2012 9:03 AM)

Figuring that having Cermark replace the ignition on the MLD-35 was another crap shoot at another bad ignition, I didn't waste the time, trouble and worry that it wouldn't be reliable... ordered a RCexl and it bolted right on with no timing problems and runs great.



e-fly -> RE: MLD-28 gasoline engine (12/29/2012 3:26 PM)

CERMARK is no longer the distributor of MLD , any question please contact MLD(liujiang007@hotmail.com) or SDShobby



airborne2.4 -> RE: MLD-28 gasoline engine (12/29/2012 11:20 PM)

quote:

ORIGINAL: e-fly

CERMARK is no longer the distributor of MLD...


Well, I'm not surprised.



AA5BY -> RE: MLD-28 gasoline engine (12/30/2012 12:57 AM)

I recently ordered a muffler for my MLD-35 and it came from Hong Kong so I'm unsure that any US supplier remains. Very sad... good engine... bad ignition.



e-fly -> RE: MLD-28 gasoline engine (12/30/2012 8:27 AM)

We have seen some bad reports about our ignition in RCU, we wang to know in detail, but we can't do it from US before, Now we are looking for partner that can bring our sevice. Our new CDI have done improvements and work well, we focuse user's feedback, there are few bad reports now. Any problems and requirements please contact us(liujiang007@hotmail.com) or SDSHOBBY.



lovefool -> RE: MLD-28 gasoline engine (12/30/2012 9:40 AM)

Hi

I am in Japan, but I know who sells ignitions systems. He may be interested in supporting MLD engines.

Jay.



e-fly -> RE: MLD-28 gasoline engine (12/30/2012 12:46 PM)

Hi Jay
Thank you, Hope to get your support.



CH Ignitions -> RE: MLD-28 gasoline engine (12/30/2012 4:48 PM)

Hi Jay,
Thanks for pointing this engine.
If anyone will send me an engine I will try to support this engine also.
Thanks
Adrian



3dsky -> RE: MLD-28 gasoline engine (12/30/2012 8:27 PM)

quote:

We have seen some bad reports about our ignition in RCU, we wang to know in detail, but we can't do it from US before, Now we are looking for partner that can bring our sevice. Our new CDI have done improvements and work well, we focuse user's feedback, there are few bad reports now. Any problems and requirements please contact us(liujiang007@hotmail.com) or SDSHOBBY.


If I am in the US how do I return my bad MLD 28 CID?? How do I get it replaced?



Jimeni -> RE: MLD-28 gasoline engine (12/31/2012 4:03 AM)

As everyone here has stated. The 28 is an awesome engine. I got lucky and got a good ignition with mine. I did have problems with SPE ignitions, they are melody also (MLD). Save yourself the headache and get an Rcexcel single cylinder ignition. Easy to install and works great. they will give you support for installation if you need it. I got a new MLD 35 without ignition, and put Rcexcel on it and it is awesome. It took the place of my 28.



e-fly -> RE: MLD-28 gasoline engine (12/31/2012 4:40 AM)

Hi Adrian
Thank you for supporting MLD.
Please allow me to consult with you somethings.
liujiang



CH Ignitions -> RE: MLD-28 gasoline engine (12/31/2012 4:46 AM)

Sure, go ahead and ask what you will like.
Thanks
Adrian



e-fly -> RE: MLD-28 gasoline engine (12/31/2012 5:18 AM)

Hi
We are ready to send CDI to US, you can contact to replacement, soon I will tell you the specific location at here.



AA5BY -> RE: MLD-28 gasoline engine (12/31/2012 9:53 PM)

Jimeni... hope the New Year is a good one for you. Can we compare a note or two on the MLD-35? Mine is installed inverted and richens when the plane inverts. I get a little more residue from it than any other gasser and I'm thinking most of it comes from those inverted periods where it is obvious that combustion is not good.

The low end is as lean as it will go and transition ok and the high end is near or at peak rpm. Running a Vess 20A on a 16.5lb plane and IIRC, it runs at about 7500. Using standard octane probably with the 10% blend and 40:1 Pennzoil 2 stroke outdoor. I'm basically happy with the oil as shown in a rebuild after a crash and bent crank of a Zenoah G-20... the inside looked great and the engine had over 600 flights on it.

Any ideas about why the MLD-35 runs rich flying inverted? I'd also say it is slightly richer mid range than most of my other gassers. I really think the only adjustment option left is the float needle or a carb change but the issue is not serious enough to me for a carb change.

Also pertinent is that it has always been this way so its not a recent air leak kind of thing or carb debris thing. It has about 120 flights on it now.

As to the MLD-35, I could not ask for an easier starting engine either cold or warm and in the 120 flights, no dead sticks.

Any ideas?



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