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Post by zachman10613 on Aug 1, 2013 21:02:57 GMT -5
My aunt and uncle bought this scooter a little over a year ago with the intent to ride, they got the carb cleaned, etc but let it sit for over a year with gas in the tank (had i only but known!). Anyway, i convinced them to let me borrow it and i had to do so much work on it they just gave it to me (sweet). I have ridden it a total of two days probably in the last two months that i've had it. I had my scooter guy come over and clean the carb, adjust stuff, and we got it running smooth and idling fine. The issue we were having was that there was a ton of gas/oil (maybe) spilling out of the vent. I found a picture online to illustrate where it's coming from.  this next picture isn't my engine, but for my lack of knowledge about scooters (i can fix them, i just don't know what all the pieces are called), i circled where the hose that is spewing out gas connects to the motor (it's spewing from the other end).  the mixture (it smells like pure gas) spews out more and more as i increase the throttle. So this is the air filter i have... the line that runs from the front plate (circled in original post) runs into the top part of this air filter box and then there is a hose that runs out and just down (blue arrow)... i think it's a drainage hose, but it was capped off (idk why).  So here is the picture of the side of my scooter, you can see i have the problem hose disconnected from the air filter box.  this is the base of the hose (where the gas is coming from)  I've also taken some videos of what is going on. These videos are short so please watch em and help out! (for some reason it started when i tried it... maybe cuz it's been sitting on the charger... anyway, it wouldnt start this morning....) Here is another video explaining the problem... and finally, idk if it's related but it's a problem that's happening when i try and start it... it takes forever sometimes, if it even starts. |
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Post by sickopsycho on Aug 1, 2013 21:13:25 GMT -5
 !!!1 Thats no good, dude. Are you sure thats where it's coming from because the only way gas should be getting into your engine is though a tiny pinhole of a jet in your carb and theres no way it could suck in so much (not to mention it wouldnt run at all). Pull the dipstick and see if it smells like gas or oil. If gas, drain the oil- you should have about 1 quart, a little less maybe of oil. The ONLY way straight gasoline could come out of your crank vent is if you have straight gasoline in your engine (where oil should be). Check your hoses carefully- make sure a vacuum line isn't mixed up with a gas line? |
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Post by sickopsycho on Aug 1, 2013 21:18:12 GMT -5
The only thing I could think of if your hoses are all properly connected is a bad petcock. Looking at the diagram you posted it appears that a vacuum line comes from the intake, for some reason T's to the carb and runs to the petcock. If the diaphram inside the petcock is torn, gasoline could be sucked through that vacuum line into the engine. In this case when you drain the oil it should be more like gasoline, not oil. you might can confirm a bad petcock by removing the vacuum line from where it connects to the intake and carefully sucking on it- gasoline will come into your mouth. if you suck the hose and nothing comes out (but you create a vacuum and cant suck harder) then the petcock is good.
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Post by sickopsycho on Aug 1, 2013 21:19:45 GMT -5
[replyingto=sickopsycho]sickopsycho[/replyingto]Last post- If your hoses are all correct I'm pretty sure it HAS to be the petcock. Thinking about it that's really the ONLY thing it could be. The symptoms will be exactly as I described- thanks for posting all the pictures, it makes it MUCH easier to tell whats going on.
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Post by skuttadawg on Aug 1, 2013 21:28:22 GMT -5
So it runs fine correct ? Only has leaks at high RPMs ? My Echarm came with a blowby tube on the engine with removable plug on the end . At first it never had anything get in there . After I broke in the engine and I would wind it out until the rev limiter kicked in sometimes it would have bubbled oil in the tube . Only enough like a spit . I saw it for the first time and checked the oil level . It was ok and I drained it out . Later when it had more I had to pour in a sip of oil to top it off .
Just checking to be sure , is it not the gas over flow hose on the carb bowl leaking ? Sometimes if a vacuum pecock is stuck open it can over fill the bowl when sitting up . This is why motorcycles have a manual valve pecock to prevent flooding , and also have a reserve position which has saved me from pushing on rides that did not have a fuel gauge
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Post by sickopsycho on Aug 1, 2013 21:33:07 GMT -5
[replyingto=skuttadawg]skuttadawg[/replyingto]Yeah what he said about the overflow line leaking. Let us know what you find out- I'm really curious now. =)
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Post by zachman10613 on Aug 1, 2013 22:09:12 GMT -5
;o Thanks guys for the quick responses, i'll take a look at the petcock in the morning. I'll try that hose thing and see if i get some suction or a mouth full of gas! A major thing that everyone is talking about is making sure the hoses are connected to the right places so i'll double check that in the morning as well! I'll take some pics and more vids if i need to.
I am new to scooters and repair, i'm starting from scratch and learning as i go. I absolutely LOVE riding and want to get this thing going strong!
Thanks again!
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Post by sickopsycho on Aug 1, 2013 22:13:14 GMT -5
No worries- glad to help and thanks for all the pics. These engines can seem confusing but on a basic level are extremely simple. Once you start working on them you can get a hang of it quickly. =)
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Post by zachman10613 on Aug 2, 2013 10:57:57 GMT -5
So i'm going to try and keep you updated as i work on this thing! I checked the carb for hoses that were wrong, and the only thing that was in the wrong place was that i have the drain hose hooked up to the bowl. It was hooked up to the red, not the blue...  I pulled out the dipstick and it smelled completely like gas, so i drained the oil pan and pretty much entirely gasoline came out, which is weird because i just filled it with oil less than a month ago... somehow the gas either mixed with the oil or replaced it entirely. Any ideas of how it's getting into there? I'm going to try sucking on the petcock hose to see like psycho suggested... i'll keep you posted! Thanks! |
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Post by zachman10613 on Aug 2, 2013 11:02:25 GMT -5
Alright i sucked on the vacuum hose to the petcock and heard the diaphragm shift and then, upon more sucking, it created a strong vacuum. I didnt get any gasoline in my mouth. Could the problem be the hose that i had in the wrong place? or that the diaphragm was somehow stuck?
Thanks again guys!
p.s. i am going to run to the store, buy some more 4stroke motor oil as it looks like i'll need to fill it after i'm done doing.... well, whatever it is that i'm doing haha
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Post by zachman10613 on Aug 2, 2013 16:27:52 GMT -5
So i got it running today. I did what i said before, drained out the gas, put oil in... I was having a ton of problems kick starting it and with the starter motor ceizing up on me... i think it was because it had no oil... luckily i didn't seriously damage the innards. I THINK the reason i had this problem was the hose thing that i mentioned before... OR the petcock somehow got stuck and sucking on the tube fixed it... either way gas was getting into my motor and oil wasn't in there anymore...
That being said, i thought i fixed it before and it wouldnt start the next day... we'll see how it does tomorrow.... i'll keep you guys updated.
Also, i took it on a little ride today and had some trouble getting it to turn over... took me like 30 seconds to get it to actually do it (runs fine once it does). see this video...
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Post by sickopsycho on Aug 2, 2013 19:50:53 GMT -5
Here's what you need to do- ride a few miles and change the oil again. You most likely have some gasoline still in there but on the bright side have a REALLY clean engine internally. =) Doesnt sound like you did too much damage but hopefully you didnt wear the bearings or anything too bad. From what you're describing it sounds like you had the gas line connected to where a vacuum line SHOULD have been. It was sucking gasoline directly into the engine, hence why the engine was full of gas, not oil. The oil you drained- did it seem like there was too much? Was it a lot lighter than motor oil should be? Was it VERY thin? With the gas line running to the wrong place your carb wasnt getting gas- which would explain why it wasnt running well- it sounds like when it did run it was running entirely on fuel that slipped by the piston rings. YIKES! Let us know how its going...
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Post by zachman10613 on Aug 4, 2013 11:46:04 GMT -5
Yeah... i think that's what was up, possible the diaphragm got stuck in the petcock, not sure about that one though... it's been running really well since friday. I rode it about 50 miles yesterday with no problems... It has a bit of trouble cold starting and i accidentally broke the screw that tightens my kick starter so i've got to replace that one just for safety (i've got a trickle charger so it's not a huge deal). But yeah, it was taking it a little bit to start up, but last night it fired right up instantly, didnt take me 20 seconds of playing with the throttle...
I'm pretty sure i need to lean the carb down a bit though... i've got a good guide to do it so i'll do that today once i'm done with homework! i'll keep you guys updated and post pics of it too... I really like it haha
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Post by djscootz on Aug 4, 2013 11:57:01 GMT -5
I had a broken petcock in my first scooter. It was pulling gas through the engine and into the exhaust. I would fill the tank and the next morning it wouldn't start, the gas gauge would be near E and when I would tilt the bike upwards, all the gas would pour out of the exhaust pipe. It was a nightmare so I am sure the petcock could have messed with yours too. I just wanted to say that I am glad you got it working and commend you on all the pictures you included. It sure helps diagnose the problem quickly.
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