RCIGN You seem to have good knowledge about the 2 stroke, do you work on them? I was thinking about buying a DA 50 however I'm afraid of it blowing while I'm down low hovering. I've read that they have a paper thin rod and a cheap little bearing on the big end of the rod. Is it true? besides it's a cantelevered crank. It seems putting those two designs together is a disaster waiting to happen. Dont be shy, just tell me the way it is. Now I'm thinking a Taurus might be the best choice. They are only a few ounces heavier and have a double web crank.

John

FYI - I talked to DA today and they said they have figured out what was causing the quitting problem. They can explain the fix better than I can. (I don't have the motor, yet, and so don't have anything to look at to fully understand the change).

Dan

Dan does the motor have to be sent back to D.A. if so this will work out great as im getting ready to send mine back for updates.

Dennis - I'm not sure if the has to be sent in, or if a person could it themself. It has something to do with the fuel line currently going into an aluminum component and, I think, being moved to a phenolic part.

Dan

Hmm..I just got a new one in..is this something that can be seen from the outside..if so I can take some pics

I believe it can be. post them anyways and then we can compare.

OK

Just got mine back from DA. They changed the pressure line from the top of the aluminum crankcase to the bottom of the phenolic reed valve carb adaptor. A guy at DA told me they are getting an instruction sheet together for the do-it-yourself person. I haven't had an opportunity to start it up yet. Good luck, Dale

What did they change??

Yano I didnt get an owners manual..was I supposed to??

Check out that fancy new case hardened con rod >>Where's the big end bearing ?
The Stihl 090 CHAIN SAW has exactly the same con rod style, open in the center..Wonder where DA got the idea ?
CHAIN SAW technology ? Still a bad word here ?
A pressure tap anywhere in the case with a line to the back cover of the carb works just fine, been doing it for 18 years on most Zenoah engines....Makes for a more secure pulse....IF the reeds seal well.....Not a problem on a piston port engine....
Kinda hard to see what difference a change in the pulse passage would make, unless it was just borderline before...Like the phenolic carb rotators from brand "H"...

Not from me Ralph. You should have that ole stump cutter of mine about now for the conversion. We might have to talk about making it as light as some of the new one's or maybe within a few oz's.

Can do
Many chain saw cases are magnesium alloy, how many of the new exotic modern technology engines can say that ? The filings from a Sachs or Husky case make a nice fire if you drop a red hot steel shaving on the floor in the middle...No way to put it out..The wood bench under my sander has a few black spots from just such a happening

Where can I "check this out" In your opinion has the weak rod/bearing issue been fixed, or is there still some question about the big end bearing. ??

I"d love to buy the DA50, but not until the probs are all ironed out

John

John Im sure if you called up DA them self they would be glad to answer any questions you have. Im sure the problem has been fixed by now.

Ralph seems to have an answer for everything that old fart

I would not hesitate to buy a DA 50 if I was looking for an engine in that size...The new rod looks GREAT.....

I'm still not understanding the "fix" for the pooling problem. Can anyone give a better explanation?

And secondly, has DA volunteered to send anyone the new rod without sending the engine in fro replacement?

I have two of these engines I intend to install in a twin BF110 warbird.......

I took a pic of this I was told they moved a port in the case. I like the logo they did on the case as well

What new rod?

There not having problems with the rod. they are doing updates on the 50 by replacing the crank and bearing. because they have had some assembled that did not go thur the full harding process on the crank's.

On a positive note,

The phone number for desertaircraft is 520.722.0607, call them with your questions, and you will get answers. DA has the best customer service of any company I deal with, internet or store front.
I have 2 Da50s and they both run awesome and have many many hours on them. Both are in top condition thanks for desertaircraft.

Give DA a call with your concerns and get help, if you need it- 520.722.0607.

I love DA and hope they are in bussiness well after we are all gone.

Regards,

Joe Kelley

The picture of the inside of the engine shows a copper plated con rod with the center opened up...The pulse port mod is something us engine converters have been doing for at least 18 years, putting the pulse directly into the carb backplate from a fitting in the case...The picture show the pulse fitting in the insulator block under the carb, not the crankcase...If the crank pin was not hard enough for the roller it's the same problem some converters had when putting a needle bearing on the rod in a ST3000...C&H did it for a while and quit when they found out about the soft pin....Right, TKG ?

It looks like they tapped a new hole and plugged the other one. Could that make a difference in fuel pooling?

that was my assumption but you know what they say about assume

I ASSume all the time, gets me in trouble sometimes
The location of the pressure port SHOULDN'T make a difference...I have put pressure fittings in all different locations, in the case, in the cylinder at the transfer port, through the side of the mount on a ST3000, never had a problem anywhere...Maybe they want to keep the pulse line short ? I have had pulse lines as long as 4 inches, using molded neoprene tubing with no problem..[8D]
Another thought..My G26 carbs are really large for a 26cc engine...The idle setting is a little strange...You can set the idle SPEED by opening the low speed needle too far, where it's too rich...The transition is still OK, but not correct...The carb has 3 little holes in the venturi that control the incoming fuel for idle and transition..It' possible to have the carb too far open to utilize the holes correctly...
Start the engine, set the idle speed to where you usually have it..Slowly close the low speed needle, the speed should increase..Re set the idle speed with the trim, then lean out the low speed needle again, the engine should speed up...Do this until you no longer get an increase in speed by leaning the needle..Now set the low speed needle for a good transition..Works great on the G26, it's worth a try, might fix the engine stopping when landing problem...
This applies only to pilots who are not AFRAID to adjust the carb needles..As in-- "I have run 2 gallons through my engine and have not touched the needles from the "factory setting"..

Your wrong, they did have rod problems,Crank and bearing problems. check some of the other threads. They have a new rod because the old one was not adaquate.

John

I'm an ASSumer too.