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Post by Elektrey on Oct 11, 2014 11:35:32 GMT -5
Ok so I drained the carb, it looked like this (minus the crap floating in it, that was in the container before).  Drained all the gas into the container, shook the container and put it back in. When I test it now I have the choke unplugged because when it is on it idles fine (probably the extra gas coming in) but without it it acts up. So it still does the same thing, unable to get past 4k RPMs and dieing after revving or at idle. I even shot air through the pilot jet and made sure it was clear. Carb and filter look fine. Fuel went through the filter when I emptied the tank so I know it works fine. There were 2 things I noticed. 1 is that there was 'this' at the bottom of the carb bowl stuck next to the drain screw hole. I think it's a gnat or mosquito or something. I have NO idea how it got into the bowl.  I cleaned it out though. 2nd, This is what the spark plug looks like (top). The bottom is one that I received with the scooter, and I'm not sure if it's an extra or if it's broken, it looks fine though, right?  So could the spark plug being like that do something like what's happening? Is it possible there's a glob of oil stuck in the cylinder or something? |
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Post by jhobe6678 on Oct 11, 2014 11:41:29 GMT -5
That's how my plug looked the last few times I've pulled it out. But I wasn't bogging though, so I doubt the plug is the cause unless it's fouled and you just can't see it through the muck. Clean it and try again? I usually give them a shot of brake cleaner after I pull them out so I don't have to keep using a new plug each time.
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Post by Elektrey on Oct 11, 2014 12:26:28 GMT -5
That's how my plug looked the last few times I've pulled it out. But I wasn't bogging though, so I doubt the plug is the cause unless it's fouled and you just can't see it through the muck. Clean it and try again? I usually give them a shot of brake cleaner after I pull them out so I don't have to keep using a new plug each time. Cleaned it with brake cleaner. Did the same thing. Is it possible that the a/f mixture got THAT rich just from changing oil? maybe its more viscous or something? Maybe the spark plug gap is off? |
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Post by jhobe6678 on Oct 11, 2014 13:42:07 GMT -5
That's how my plug looked the last few times I've pulled it out. But I wasn't bogging though, so I doubt the plug is the cause unless it's fouled and you just can't see it through the muck. Clean it and try again? I usually give them a shot of brake cleaner after I pull them out so I don't have to keep using a new plug each time. Cleaned it with brake cleaner. Did the same thing. Is it possible that the a/f mixture got THAT rich just from changing oil? maybe its more viscous or something? Maybe the spark plug gap is off? Your guess is as good as mine. I'm new to the pre-mix thing myself. In fact, I think when I cleaned the carb and moved the needle up, I still think I need to go up a jet size. But that's a battle I'll take on later, for now the motor actually sounds like it's running right to me so far so I'm not messing with it just yet. I am eager to see what others say here though! |
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Post by 90GTVert on Oct 11, 2014 13:44:42 GMT -5
You shouldn't make more than a 1-2% difference changing around ratios or oils as long as it's mixed well. I can't see why it should suddenly change like this just from using a different oil or switching 32-48:1 ratios. The fact that it has ran well once it's going doesn't make bad gas or bad mixing seem so likely. The way it sputtered at part throttle and then acted fine afterward could be a needle setting or pilot/idle mixture issue... but neither of those should come on like a switch after filling up and using a new oil.
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Post by Elektrey on Oct 11, 2014 14:01:18 GMT -5
You shouldn't make more than a 1-2% difference changing around ratios or oils as long as it's mixed well. I can't see why it should suddenly change like this just from using a different oil or switching 32-48:1 ratios. The fact that it has ran well once it's going doesn't make bad gas or bad mixing seem so likely. The way it sputtered at part throttle and then acted fine afterward could be a needle setting or pilot/idle mixture issue... but neither of those should come on like a switch after filling up and using a new oil. yeah I don't get it. It ran perfect before I added the new gas in. Really stumped. Would running Saber at 80:1 or 100:1 be bad for a scooter? I feel like even the 48:1 is just too much for this engine's liking. |
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Post by Elektrey on Oct 11, 2014 16:54:48 GMT -5
I mixed 0.5 gall with 7-8.5 ounces to give me an 80:1 mixture. Drained entire scoot and replaced with that. Did the same thing.  Still gives me oily spark plug and lots of smoke when starting.  Should I not be using Saber? It says it's for handheld lawn equipment and things like that. dunno what to do now. Maybe buy a new spark plug? Buy new oil? |
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Post by Elektrey on Oct 11, 2014 18:55:52 GMT -5
Ok I swapped in for the other spark plug and it does the same thing so either they are both fine or are both fouled/gapped wrong in some way.  Even at 1:80 its still creating a black oily spark plug. Things I noticed: exhaust pipe doesn't get hot, and when it does run (at mid throttle) the exhaust is NOT hot at all very cold. Again, I've removed the choke to isolate the problem. And I turned the air screw in ALL the way and ALL the way out. Didn't make a difference. I'm starting to think the scoot just doesn't like AMSoil. There goes the $12 for the quart and $7 in wasted gas. Thinking about taking off the exhaust pipe and seeing if there is oil/carbon buildup blocking it. EDIT: tried doing it. Got the mounts off but the two bolts on the exhaust were a problem. One of them I tightened instead of loosening and it snapped and the other one is a star or something and can't find any pieces that will turn it. |
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Post by niz76 on Oct 11, 2014 21:12:52 GMT -5
I mixed 0.5 gall with 7-8.5 ounces to give me an 80:1 mixture. Half gallon of fuel and 8oz. of oil?? am I reading that correct? I'm mixing at 45:1 and add 3oz. of oil for each 1 gallon of gas... |
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Post by Elektrey on Oct 11, 2014 22:01:00 GMT -5
I mixed 0.5 gall with 7-8.5 ounces to give me an 80:1 mixture. Half gallon of fuel and 8oz. of oil?? am I reading that correct? I'm mixing at 45:1 and add 3oz. of oil for each 1 gallon of gas... yeah my bad 0.7-0.85oz |
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Post by 90GTVert on Oct 11, 2014 22:08:21 GMT -5
Again, I've removed the choke to isolate the problem. If you unplug the enricher it will always add fuel so it would be more rich on the low end. If you take it totally out of the carb I'm not exactly sure what it will do, but prob nothing favorable. I would stick with 40-50:1. I don't think it's the AMSOil or regular mix ratios causing this. |
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Post by oldgeek on Oct 11, 2014 22:23:27 GMT -5
Try some starting fluid, or flammable brake cleaner shot into the carb, throttle held wide open to see if you can get it to rev. I bet you still got oil somewhere in it. I had very similar problem.
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Post by Elektrey on Oct 11, 2014 22:23:51 GMT -5
Again, I've removed the choke to isolate the problem. If you unplug the enricher it will always add fuel so it would be more rich on the low end. If you take it totally out of the carb I'm not exactly sure what it will do, but prob nothing favorable. I would stick with 40-50:1. I don't think it's the AMSOil or regular mix ratios causing this. I guess I'll keep it plugged in then. I'm really not sure what it is, but I can't do any more testing until I get this exhaust off and put another stud. I'm thinking the exhaust port of the engine got clogged with burnt oil or carbon or something maybe? So it's restricting the exhaust? Not sure but it might give more info on the problem. oldgeek thanks that sounds like it would work. I imagined if I ran it the oil would burn off but maybe starter fluid would burn it off quicker. |
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Post by Jwhood on Oct 12, 2014 9:35:25 GMT -5
I use a little over 2.9 ounces of amsoil on every fill up which is about 1.4 gallons,looks like you will have too get broken bolt out of the cylinder exhaust port or upgrade too a 70cc kit now elektrey!!!!; )
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Post by 90GTVert on Oct 12, 2014 9:38:38 GMT -5
If you unplug the enricher it will always add fuel so it would be more rich on the low end. If you take it totally out of the carb I'm not exactly sure what it will do, but prob nothing favorable. I would stick with 40-50:1. I don't think it's the AMSOil or regular mix ratios causing this. I guess I'll keep it plugged in then. I would plug it back in and if nothing changes see if your enricher is functioning properly. Should be able to check it hot and cold. Cold the enricher shoudl be extended. Hot it should retract into the housing some. If it doesn't change it's not working. |
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