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RE: Echo BME twin - 3/27/2009 5:48 AM   
av8tor1977



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Status: offline 		How much for the Homelite reed valve?? "First dibs" if I can afford it...


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RE: Echo BME twin - 3/28/2009 12:32 AM   
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Status: offline 		Hi Buck..... The parts for the Echo 61 reed assem. arrived this evening and they look just like the ones you have pictured. The are genuine Echo parts, still had the Kioritz Corp. tags & part # with them. I will install them as soon as the engine is completed, to check the clearances and fit on the Echo 2.8. Oh, these parts came from the Parts Tree site so he must have a source. I haven't heard from the H&H Lawncare Equip. yet, I will have to contact them to cancel that order.

Later George

< Message edited by oldtimer2 -- 3/28/2009 12:39 AM >

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RE: Echo BME twin - 3/28/2009 7:40 AM   
buck1856



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Status: offline 		I went to parts tree and saw the parts and numbers.I will order me a set also.I might just try the the 33cc ones i have anyway and then compare them to the 61 later.But the 61 should be a lot better in performance.
And like you said,much lower profile.Im also going to weld my crank first to check all the heat settings then do yours.I already pmed you to let ya know what was going on.
The hub is already done.If av8tor purchases the reed setup let me know and ill ship it to him for ya or ill just send it back to you.Im going to send ya another pm as to not hijack the thread with a bunch of personall things about your case,crank,ect...

< Message edited by buck1856 -- 3/29/2009 8:45 PM >

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RE: Echo BME twin - 3/30/2009 5:41 PM   
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Status: offline 		av8tor1977 Sent you a PM 3-29-09 George

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RE: Echo BME twin - 3/30/2009 5:42 PM   
oldtimer2


 

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Status: offline 		buck1856 sent you a PM 03-29-09 George

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RE: Echo BME twin - 4/5/2010 8:44 PM   
oldtimer2


 

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Status: offline 		Hi Matt, I have tried to send a couple of replys to your PM. I don't know if you received them or not. Anyway I will try again since I don't know your Email. The site you are looking for is (arboristsite.com.) Also I had a question for you, If you could measure the G62 prop hub mount Holes center to center distancefor me I would appreicate it. I have the flywheel that came off of the Echo 61 that I could have the center cut out of if the holes would match up. I hope this PM gets to you.

Later George



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RE: Echo BME twin - 5/29/2010 8:41 AM   
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Status: offline 		Is anybody still working on these? Im looking for some 23 cc cylinders and piston for a for cylinder im building.. if so please send me a pm

Thanks Joe

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RE: Echo BME twin - 5/29/2010 11:03 PM   
av8tor1977



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Status: offline 		Well that's pretty interesting looking. Please keep us posted. Sorry, don't have any extra cylinders. The 21cc cylinders are much easier to find. You might scrounge up a couple of those to use for now, then you could switch to 23.6 cc cylinders later once the engine is proven. (Same bolt pattern, stroke, etc.)

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RE: Echo BME twin - 5/30/2010 9:05 AM   
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Status: offline 		Thats what ive been thinking! Its hard to believe how many different changes were made on these transfers...I also used the old crankshafts out of the gt 200 they were muck better as far as heat treat,I pressed one appart and the press fit was much tighter than the new ones about three thousands difference on a ten mm pin ..I will keep posting pics ,I will have it runing as soon as I find some..
Thanks

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< Message edited by aviatorplus -- 5/30/2010 9:29 AM >

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RE: Echo BME twin - 5/30/2010 11:42 AM   
av8tor1977



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Status: offline 		Does each opposing cylinder set use a sealed crankcase half, or is the crankcase open to both cylinders? How did you do the crankshaft interface/connection, and is it a permanent or break down connection?

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RE: Echo BME twin - 6/5/2010 8:01 AM   
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Status: offline 		The crankcase is sealed in the middle with two sealed bearings. The front set is on one set of reeds and the rear set on another. The crankshaft is done like the 2.8 but the two are joined by a 5 degree taper and threaded, I also put a set screw. They had to be installed in two half’s to get in the case..I still can’t find any 21 or 23 cc
any suggestions on where to look on line?

Joe

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< Message edited by aviatorplus -- 6/5/2010 10:40 PM >

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RE: Echo BME twin - 6/5/2010 8:23 PM   
av8tor1977



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Status: offline 		An online search will come up with lots of parts places. I have used "ordertree" and Jack's Small Engines, among others. They are going to be quite pricey to buy new... I have an Echo 58cc that lives on a shelf because a piston and cylinder for it cost 200+ bucks.

Seems like someone mentioned a Farmers Supply here in the forum that carried Echo parts. Do a search here in the forum for that one.

Good luck, and please keep us posted. Neat project.
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RE: Echo BME twin - 6/6/2010 5:55 AM   
RTK



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Status: offline 		Call Tom at bmeengine.com he might have a source.

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RE: Echo BME twin - 6/7/2010 9:30 AM   
aviatorplus


 

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Status: offline 		Well, I found four 23 cc but two of them have a few groves on the exhaust side and are the later ones with the singer rings. But I was surprised at the compression
The hunt goes on but I will try to get it fired up on these


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RE: Echo BME twin - 6/7/2010 11:54 AM   
Ralphbf



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Status: offline 		Grooves in the cylinder are only real bad above the exhaust port.

Below that and the simply retain oil.

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RE: Echo BME twin - 6/15/2010 8:47 AM   
speedygonzales



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Status: offline 		I saw some posts of someone using what appeared to be a modified weed waker case.
would like to make a twin, have machines but not big enough to mill out a case in any reasonable amount of time.

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RE: Echo BME twin - 6/17/2010 7:50 AM   
Scota4570


 

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Status: offline 		Amazing work.

Hey, what about wacker parts twins? I have a pile of Sears branded Ryobies that are ripe for hacking.

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RE: Echo BME twin - 6/17/2010 8:21 AM   
rangerfredbob


 

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Status: offline 		the sears wackers that look like ryoi's are actually poulan, but close enough... i have thought the same thing if I had a mill and materials...

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RE: Echo BME twin - 6/17/2010 8:23 AM   
av8tor1977



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Status: offline 		aviatorplus - Man, you are too close now. Let's hear it about those test runs. Cool engine!

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RE: Echo BME twin - 6/18/2010 7:17 AM   
aviatorplus


 

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Well,
I got it started two of the cylinders are in bad shape but good enough to run...I didn’t have two of the same carbs so these are temps. Still allot of tuning, I think I’m going to build a manifold so I can run one larger carb
Here is a short video

http://rcuvideos.com/video/92-cc-four-cylinder-custom-buil

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RE: Echo BME twin - 6/19/2010 7:45 AM   
Scota4570


 

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Status: offline 		Inspirational work!

It has me thinking. If I use two of my Ryobi clones won't I have to split the case down the middle to allow assembly? If so wouldn't I be better off to just scratch make a case than trying to figure out how to marry two of the Ryobi cases? Or are you all using con rods with split bearing saddles?

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RE: Echo BME twin - 6/19/2010 7:33 PM   
av8tor1977



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Status: offline 		The Echo engines we are using for twins, and now this amazing four cylinder job have a full crankshaft with bearings on each end. The Ryobi engines have a cantilever crank with bearings only on the front. I don't know how one would connect two Ryobi crankshafts and make it work, even if you solved the crankcase problem.

Super cool engine aviatorplus. Nice work!!

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RE: Echo BME twin - 6/19/2010 10:16 PM   
Scota4570


 

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Status: offline 		Cranks, see pic.

Case? Square bar stock with a round hole. Make the ends with the bearings seperate and to fit the round hole. Machine all necessary holes, dowels, threads, and such. Remove all unecessary metal?

Assembly, Is there enough room to slip the crank with con rods on it into the case from the front or rear? Then the pistons are attached after?

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RE: Echo BME twin - 6/19/2010 10:56 PM   
av8tor1977



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Status: offline 		Well, I see where you are going with the crank, but you would need to install longer crankpins for where they go into your center crank "joiner". The crank "joiner" would be a tricky piece to make, and the crank pins would have to be a precise press fit into the joiner. Then you would need a two piece crankcase that splits down the middle for assembly. No need to make up custom "clam shell" rods, you just put the rods in place on the crank before it is all pressed together. If it were me, I would then also pin those pressed joints.

It just seems a lot easier to use an Echo or Stihl or some other engine that uses a non-cantilever crankshaft to begin with.

Nice drawings by the way...

AV8TOR

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RE: Echo BME twin - 7/15/2010 5:24 AM   
aviatorplus


 

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Status: offline 		I made the manifold to use one carb and an updated video. These muffler are resticting the engine but good enough to break in. I ended up using 21 cc cylinders because I couldnt find four good 23cc . Heres the video

http://www.youtube.com/watch?v=xr0dFNhGnSk

< Message edited by aviatorplus -- 7/15/2010 7:55 AM >

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