I have a leaking spacer on my 3w carb. I found a thread a while back when someone uses da's spacer with 300 trouble free flights anyone know how to find this thread? or now how to convert?

Try going around the gasket with medium or thick CA? Worked for me. I bolted it together and ran a bead around the outside. Also Locktite makes a great gasket maker. Buy it at auto shops.

use loctite 518,just a very little on both sides put it together and fly but don't put it on the rubber side of the reed plate,it eats rubber

I had the very same thing done to my 3W140 four years ago and it's running great.
I can't find the thread or instructions, but I have the pictures of someone doing it.
There's a guy named Kris that used to be on all the boards, but I don't know how to find him amymore.
He might be on the Yahoo IMAC group.

It does work, and it's a good idea!

Bob

Mine leaked too, and the answer, unless it's warped, is to take it off and use that loctite anaerobic gasket maker, just like Ron said. Make sure that when you put it back together, you don't overtighten the bolts. Mine have worked great since I've done this, and it's a lot less expensive that a new carb block.
Sam

i just got the new aluminum carb block for my 106 and it is the **** for sealing.i don't know if it fits any other engines but call bobby at cactus and talk to him about it

PLease Guys help

My Dl50 sudenly lost compression, i disasemble and find this in the piston, any ideas??? i cant move the ring, is stucked in the failure

That appears to be the anti-rotation pin for the ring and it obviously shouldn't be there. I'd say it worked loose and grabbed the cylinder wall. I would definately get ahold of DL and ask them to replace it under warranty. Where did you buy the engine?? Please say DLUSA.

I get the feeling he DIDN'T get it from Bob at DLUSA. If that's the case he may get stuck with the repairs.[:@][:@][:@][:@]

isn´t the antirotation pin, is a very large scratch

i bought the engine directly from China to Chile

Well from the picture it looks as though the anti-rotation pin is embedded in the top of your scratch! The piston and ring are toast. Check the bore to see if it screwed that up too. Did you find anything in the engine that shouldn't be there like a little screw or pebble?? Something definately got ingested or came apart. Possibly a needle from a needle bearing???

if you can help me i send more photos the first is the antirotation pin, the second pic is the scratch (i broken the ring trying get out this stucked ring). As for info the cilinder apears to be in good shape, no scratches

It looks as though something got into the engine on the up-stroke gouging the piston and trapping the ring in the groove. If the ring is broken then rotate it back and forth until it comes free of the piston ring groove. Then take a small Swiss needle file and dress the damaged area of the groove. Then use a wet stone (sharpening stone) if you have one and hand dress the outside of the piston so there are no high spots around the scratch. Clean the engine housing out completely and make sure there is nothing in there, replace the ring with a new one and put it back together. The scratch shouldn't effect your compression. The ring seizing is what did that. IF you can't get one locally you should be able to get a new ring here.

http://www.dlusa.net/Parts.html

Looks like it caught a piece of debris in the port maybe just a guess since it didn't scratch the cyl wall

Yeah, that's what I'm guessing. I just hope the language barrier doesn't make it difficult for him to understand what I'm telling him. We've talked before and he's a really nice guy. BTW I love your signature and your avatar.

Guys, the cilinder is like a mirror without scratches. Can i change only the ring and piston??? or is 100% necesary change the cilinder also??

THANKS A LOT FOR THE HELP

You can repair the piston if you do what I told you. If the cylinder is like a mirror then it is okay and you can use it.

Hi guys another question, is normal a little play in the crankshaft???, i have around 0,5 mm of axial play, and lateral play, around 2mm



THANKS AGAIN TO ALL OF YOU

Nicolas from Chile

No but you might be close to finding the reason for the groove in the piston. See if it is missing a needle bearing or 2.

Sure sounds that way, doesn't it?

Did the engine ever suffer a prop strike? Sure sounds like it did with the crank bearing play and the gouged piston. Probably broke the needle bearing cage and the first place the debris goes is up the side of the piston. Send the engine to DLUSA for repairs and pay the price, or get a new one from DLUSA. Also check those needle settings. You've been running on the hot side.

If the cylinder is clean that part of the engine is good to go but the rest of it needs a bit of work.

I found two metal particles 2 mm lenght, one stucked in the combustion chamber on the top and other in the cranck case. I checked the bearings of the crankase and the piston and are ok no missing parts. Where this craps are from???

If you have metal in the engine it usually comes from the bearings unless the engine ingested the throttle shaft spring or choke/throttle plate screws. One other possibility is that the cylinder had excess casting flash at the bottom that broke loose and traveled. Unless you removed the rod from the crank you cannot completely inspect the rod bearing. Wrist pin bearing has to be removed as well for a full inspection.

AL LEWIS What is the meaning of "ring seizing???" """""""The scratch shouldn't effect your compression. The ring seizing is what did that. IF you can't get one locally you should be able to get a new ring here. """""""