it is an echo wwacker, I think 20cc the clutch shoes are just inside the flywheel,,it looks like I could lock the flywheel in place, clamp on the big vise grips and turn, but it doesnt want to move,,,any suggestions, do I need to heat the assembly?...Rog

yep, takes a little heat,,now I just gotta dremel off the case that I dont need, get the glow plug adapter and start from there..tower has some kind of hobbico adapter, but its a bad pic and the explanation doesnt make much sense,,like its written backwards...Rog

Have you researched this motor at all? I know the ones below 25cc are pretty soft on power, Not trying to discourage you..just be aware it might not have a wide option for airframes..Might make a decent little boat motor ..not a speed demon there either..but in the right boat would be fun.

I use a 4 inch angle grinder from Harbor Freight (lIke $12.00 on sale) and a 4 inch cutoff wheel to quickly remove excess case metal. Be careful, as it will also remove essential body parts if they get in the way. []

No. I dont have anything in it really, and if I pay $12 for a glow plug adaptor and get it running on a stand then I will put that much more into a spad for it and still be ok with it, but thanks for asking, it might be a big ol' whoops that didnt work out like I thought, or it might be my favorite plane, I got time....Rog

Dont have one of those here, and I'm pretty sure I just burned up my Dremel tool cutting one lug off....yup I did, dang it....Rog

Order online. free shipping on minimum order. harborfreight.com

be real careful on the case trimming, I once had a motor that was a little wet from the saw howsing removal...A little later i was cutting the case, bumped a bolt head with the cutting wheel ..instant fire! it was more of a quick flash of fire.. but keep it in mind..Tore down a few motors..that was a first..but it woke me up quick.

? Well if you mean left over gas/oil , I cleaned it with brake cleaner this morning out on the street and left it out there to dry in the sun, got a bud down the street with a full machine shop,,and of course he picked today to disappear.....Rog

Some of the old integral tank and crankcase chain saws had magnesium cases and that stuff is history if it lights up like what was just described by Foodstick.

Didnt know that, magnesium, didnt they use that to make flash cubes?..ok, will be careful,,,like the lipo batteries,,cant put that stuff out from what I hear....Rog

If you handle aluminum die castings often and come across a magnesium one, you can feel the difference.

They will burn like a flash cube.

Yeah, Echo used magnesium for the CS-510 and CS-650. It cuts real nice with a disk or belt dander. Cuts real slick on the bandwaw. All that easy cutting gives you a big pile of magnesium filings. The next time you use the sander on steel you get a big fire. Clean up after.

I think it was zirconium that was used in flashcubes, but it was magnesium powder that Mathew Brady and those O.F.s used in those trays they lit off when taking portriats with those giant old box cameras that used tin or glass plates.

I just use a junior hacksaw or a full size hacksaw to remove material, it'll cut WAY faster than a dremel, cutting aluminum with a cutoff wheel in a dremel doesn't work well because it catches and builds up on the wheel. before I pull out the saw, I simply use channel lock pliers to break off the bulk of things, or cut the end of where I want the material removal to stop and then use the pliers so I don't go too far.

you don't have to go nuts on material removal, cutting off little bits of aluminum doesn't remove all that much weight, so if there are little ribs that might help the structural integrity of the crank case, leave them... it's better to have an extra ounce of weight than to have a crankcase that will break in a few hours of use.

The alumium even impacts itself into the teeth of a carbide burr on a air powered die grinder. You have to continually stop and clean the cutter with a scribe.

Ended up with the hack saw, wasnt too much trouble, a friend ground down the funky nut that held on the flywheel, and is grinding down the whold flywheel basically to a tapered washer...wow walbro makes/made a lot of different carbs,,gotta make some calls about rings and rebuild kits for the carb...none of the small engine places stay in business very long around here....Rog

yeah, I know, I end up using manual methods for my work to avoid that, I've got a decent assortment of files in my box, along with a file brush... it doesn't take much to cut through aluminum, but if you try to go too fast you'll end up taking longer... I do wish I had a blade for my bandsaw though...

Hey, what prop am I gonna need for 20cc's 11 x 5 is the biggest I have right now, dont remember what that was for...I had a saito .65 but sold it....Rog

Prop? A 15x8 APC will be in the ballpark.

15??!!! no way...this thing is a tank, I'm gonna need revs to get off the ground,,there is no torque....Rog

I have a Weed Eater 21cc that is stock and it turns a 14 X 10 at 7200

I suggest you do some "what if" calculations.

http://personal.osi.hu/fuzesisz/strc_eng/index.htm

A small high reving prop will not necessarily produce the most thrust. Play with the calculator keeping the horse power the same but varying the prop size and pitch. You wil see what I mean.

This thing feels like 5 pounds without carb or exhaust, I'd weigh it but my "girlfriend" cleaned up the house and I cant find my scale and she went back to Fla...there is some kind of counter weight where the pull starter was, but its not 180 degrees from the crankshaft counter weight...and its not very heavy, just some 1/8" plate...Rog

Found my engine... http://echoinc.arinet.com/Scripts/Em...ghlightNode=No

But I called the largest oldest small engine shop in town Ho-Pa, the number is bad, the website is down, I go today and there is a sign on the door ..they have turned their business over to another shop and put that number on the door and they are out of business too!!!....
good news about the engine is ball bearings front and rear and roller needle bearings on the connecting rod...small engine shops pop up all the time (maybe I should do it!) and a year later they are lawnmower junkyards and gone....Rog