A few days ago i noticed a little oily mixture on the balancer ring behind the prop,today when i was messing with it,i thought i felt a mist while i was standing in front of the prop so i gave it more throttle and yep,there was a light misting,later when i shut it off i noticed at the base of the carb had fuel around it,i'm wondering if it's coming from the top of the carb or is there a seal on the front somewhere ?,also,how does that black ring come off or is it threaded ?.The engine is the Evolution 61.
Thanks

There should be a seal between the carburator and the crankcase, and if i remember this engine correctly, there is also a clamp built in. the clamp may be loose or your seal worn out. where is the mist coming from?

I have no idea where it's coming from but that is what i'm trying to figure out,can you explain about the clamp ?,is it the black ring just behind the prop ?. On the carb ,i can't see a seal,or any screws that holds the carb in place.
Thanks

just behind and below the carburator is a screw that may look like it is going into the crankcase and not doing anything. that is the clamp.

It's normal for a little stuff to leak out of the front bearings on many 2-strokes, that's how the bearings get lubricated. But we are talking about just a little oil, and it shouldn't be noticeable while running.

However, what you're describing sounds like something else.

You got misted by something coming from the engine, while standing in front of the engine with the engine running? That's strange, since I'd expect the prop blast to blow anything coming out of the engine back.

If, on the other hand, you got misted while fueling, I'd say you have a pin-hole in a fuel line. The pressure from your fuel pump can make a nearly-invisible hole spreay out a little jet of fuel for a surprising distance. I sprayed myself in the face the other day this way. (good thing I was wearing sunglasses, and it wasn't much fuel at all, but it surprised me).

Leaking around the carb, of course, is a bad thing and will often cause poor running as the engine doesn't draw fuel like it should, and goes lean.

It's also possible that you somehow have a trashed front bearing (and maybe crankshaft-crankcase fit) that is causing the engine to actually spray fuel out of the front bearing. If this is going on, it would be time to get the engine looked in person by someone who knows engines, and it might be time to send it in for service or re-build it.

In the picture:

#2 is one end of the carb attachment bolt. This picture makes me think it's a draw-bar type, which means that on the opposite side, there is a little nut. make sure this guy is nice and tight, useing threadlocker is a good idea. Push down on the carb when tigtening it to make sure the gasket/o-ring is compressed.

#1 points to the o-ring where the carb mounts. The little black line there is the o-ring. If the fuel is coming from here, the carb is loose, tighten as in #2

#3 points to two places where fuel might come out if it was a problem with the front bearing.

I didn't highlite the fuel tubing and nipples, but you'll want to check those as well.

On #3, looking at the silver what i call a balancer,how does it come off,also the shaft with threads and nut ?,does that come unscrewed ?.
On #2,i saw where that screw is and everything seems tight.
On #1,i see the O ring and it looks like it is seated pretty good.(squashed)
Thanks

5 spot it sounds like the front bearing seal is bad. I had an old junk Leo that did that. It was just plain a junk engine. I would take the prop driver off. It should have a woodruff key or a brass cone under the driver. You may have to pull on the driver with some pliers. Not real hard just enough to disengage the brass split collar. Check the front bearing visually for damage. If that fails Pull the carburetor and back plate off and inspect for debris. I had some foreign material in the crankshaft under the carb cause this symptom once. If you see nothing or a problem, and the engine is under warrenty send it back for repairs. I Hear the warrenty situation is very good on the Evo engines. Good luck with your engine.

Mark Shuman

The first pic is where the fuel line broke,this is where i wanted to move it out of the way and it broke in this location but i didn't have to pull very hard,i think it was partially cut or broken,the fuel line i have now is bigger od and blue.
Balancing ring,this is where i thought fuel was coming from but there is no screw or anything that holds it on that i can see.I pulled the prop and plate off for a better look but still don't know how it comes off.
All in all i like this engine,it's about two weeks or so old,i don't want to tinker too much with it to void my warrantee.
Thanks

O yeah,since i was running it on the grass,maybe i coulda got a grass clipping in it but it's not leaking now,however the mist is what i'm wondering about.

Here are the fuel/oil spots i'm talking about leaking on the paper,just two spots but made day or so apart

was the mist coming through the prop blast and coming out the front or was it being blown back? your post is kind of ambiguous, but i can't see a fine mist making through all that prop blast. is it at a certain throttle point or all through out the dynamic range?

I was standing in front of the prop,i just restarted it and i was bad,i reached over the prop to remove the glow lighter,the engine was above idle maybe a fast idle but i have no idea now,i havn't tried to duplicate it.

Some engines, if they are running really rich, will actually spit fuel out of the carb throat up in to the air. If that's what is going on, then it's not a problem at all.

This is most noticeable at low throttle (I'm not sure I've seen it at high throttle, but I've really seen some engines spit at idle) because the airflow down the carb throat is not enough to suck in all the fuel (and, of course, the intake port is closed a good part of the time, meaning no airflow), but the backpressure from the muffler to the tank is shoving fuel in to the carb. So the fuel comes out of the spraybar and can't go down in to the engine. So the prop blast throws it up and out, where it gets on your hand as you reach for the glow ignitor.

A little fuel or oil on the flywheel (the black thing behind the spinner, pointed to in your 4th picture) isn't necessarily a bad thing. And a little leaking of stuff while the engine sits is also not a bad thing. All my engines leak a bit when they are sitting because I store them nose-down, and any residual fuel or after-run oil will leak out the front bearing. The spots on your newspaper are about what I'd get from some of my engines when I store them. (I often wrap a papertowl around the engine to catch leaks, espeically when the wife is watching)

As for getting the flywheel off, I'm not sure how the Evo holds it on there. Differnet engines do it differently. Some use a key (OS does this), so it would just come right off. Some engines use a tapered cone, which makes a rather tight fit. You might have to use plyers or heat the center of the flywheel to get it to expand. Some actually use an interference fit, so there is no way you can get it off with out using heat or a puller. Unless you really need to get it off, I wouldn't bother. I'm not sure I see a reason here to be going there.

Ok, I just realized I didn't see something in your posts, so I gotta ask:

Does the engine run fine? Reasonable amount of power, idles ok, etc? If the engine runs fine, you don't have a problem go fly. Don't worry about a little fuel or oil getting thrown around, these engines are actually fairly messy. If the engine runs right, then you're just seeing "normal" mess.

ok. during the power stroke of a two stroke engine, the fuel air mixture is compressed inside the crankcase. there may be a small hole somewhere or your front bearing is bad, causing the dense fuel air mixture to be forced out of the engine. If this is what it happening, you will not ruin your engine by running it that way, it will just loose abit of power and be a bit messier, but i reccomend having it looked at.

While i was standing in front of the prop and my hand was in front of the prop,that is when i noticed something like a mist,i held my hand there for a few seconds and my hand and arm could feel something like mist,i might of been adjusting the low screw on the carb,the engine runs well,even with the 12X4 three blade prop but runs better with the 10X6,however the 10X6 is a tapered prop,maybe that is the reason it pulls it better.I'm going to do some more checking,as soon as i mow the wet lawn and get some honey-do's,my wife isn't having a fit,YET[

5_spot,

I would strongly suggest getting some experienced IN Person help. 1 hr with them will save your countless hours of frustration and possibly prevent you from damaging your engine due to lack of experience.

This is not a slam just an opinion take it or leave it as you will!!!

I appreciate all the help up here and i havn't removed the limiters and won't,i have been tuning small engines,even 2 cycle weedeaters and such,like i say,lots of help up here,but the guys at the flying field has tuned the high side however,i'm not going to take a chance on doing any harm to this engine as it is still under warranty,what i'm trying to do is diagnose a possible problem,and i like tinkering with it,if the seal or anything is seriously wrong i will take it to the proper shop or send it in but i need to work on this engine in years to come.
I do appreciate your and everybody's help on any problem i might have,even if they sound petty to some but they are important to me.
Thanks

Ok, I don't know what I'm talking about, even though I have the same engine, but could it have started up backwards and have been blowing out the carb? I've got the same engine, and after the first couple of tanks an instructor had to remove the limiter to get the engine leaned out right. Yours could be running rich and blowing a bit out the carb. I think you should try to repeat it with someone there who has more experience. Oh, and instead of putting on a bigger 3-blade prop, I took the baffle out of the muffler, and bought a metal 2 blade spinner, and a 11x6 2 blade prop for mine. Removed the flywheel also. Now the crazy Extra EZ 2 pulls off in about 20 feet even through a couple inches of slush.. - Joe

I cut one of the props down,now it's 11X4,i have put it on and started it but that's all i did,it revved up quicker and seemed to run a lot better.Then i tried a prop that was sent to me,a wood Top Flight Power Point 10X6,wanna know what happened ?i started it and i got a rush of air,the engine was running backwards [X(] ,i killed it and restarted it but the same thing happened,backwards and i know it was running backwards cuz the plane had a very nice reverse. This is gonna open a new can of worms.

Dude! Top Flight Power Point props are made for pusher planes, they only run backwards!
I use an electric starter. Since my EVO always wanted to start backwards, I hooked up the power to the starter backwards, so now the engine starts in the right direction. I had to get rid of the EVO white plastic 3 blade spinner though. An electric starter will eat them up if you're clueless like me. Got me a metal 2 blade spinner and a 11x6 prop to solve that problem. - Joe

Ok,now i get it,those scumbags that throwed that prop in "for free"are probably still laughing there buns off,hmmm,i think i'll call them up and tell them my plane ran backwards into a wall. ,then we'll see who gets the last laugh[>:]
Thanks for the info

*WARNING! read instructions before installing* what instructions ?.

I just took the plane outside and started it,darn thing starts up on the first flip BUT it didnt want to take throttle very good so i just thought it was cold at first,then i put my hand in front of the prop AND IT WAS PUSHING AIR into my hand,i killed it and restarted it,same thing but the third time i started it,it was pushing the plane forward so i know what happened,i think,when i put my hand down and felt the mist ?,the engine had to be running backwards,i don't think they make a icon for me being such a dumb***** but for what it's worth,i coulda keep my mouth shut and nobody would of known the difference but i just want to thank everybody that tried to help me with my "mist",i feel so damm stupid now.

Hey man you got waaay to small of a prop on there for one thing!!!!!!!
You said it was a .61 right? 11X7 or 12X6 prop, 13X5 will work too. If you are using the props you mentioned, it could well be starting backwards, among other strange behavior.

Joe L. You know more than you claim, but Power Points are made for both pusher, and tractor applications, last I checked.......
Jetts

Check this out.....

Thanks for the chart,been trying to find one but without successi'll print it and save it for reference and your right about the wooden prop.
Thanks