MC-16K-150 By carlster2011 (Read 1,811 times)

[carlster2011]

Hi everyone, I'm new here. I'm glad I was able to find this site, it seems like it can be very helpful.
I have just got a new scooter and I'm having issues with it right off the bat. After going through everything and tightening up many nuts and bolts and replacing the headlight (already, because the one from the factory was wired wrong and caught on fire after about 15 mins after I finally got it started). At this point I must say that I'm not enjoying my new scooter at all. Any way I beleive I have worked out all of the numerous minor "kinks" there is still one that I haven't quite work out yet. It will start ok and run good, but at random times usually when idling or once at about 5 mph it just stops, no sputtering or anything, just like turns off. When this happens it is incredibly difficult to restart. I usually have to give it a skirt or two of starter fluid.Once it starts again it seems to run fine until the next time it happens and then its the same thing. I can only get it started with a few skirts of starter fluid. If its running good and I turn it off it seems to restart just fine. I'm beginning to get very frustrated with it because its unpredictable as far as when this will happen and considering its brand new I've been stuck quite a few time (I now carry the can of starter fluid as part of my tool kit). If I could just get this worked out so that its reliable and I wouldn't have to be worried about getting stuck everywhere I would be so happy with it.
It's a : KAIT MC-16K-150
So far I must say I'm not to impressed with it.
My other question is there is a clear hose in the engine compartment that I have no idea what it does or if it my be part of the problem. When it was running I removed the plug that was in the end and it almost seemed to run better (or it was just a coincident, like I mentioned when it running in run very well). I'll try to add a picture of the hose I'm talking about.
Any help or advice anyone can give me would be very greatly appreciated. I'd really like to start enjoying it instead of getting headaches with it.

[ce]

That hose is the drain for the valve cover vent and should be routed down so that it can drain the oil vapor that condenses in the air cleaner from the valve cover went. Just stick it down so that it hangs and check it after a while. Check to see if your valve cover vent tube is kinked or blocked, it's a black tube coming back along the left side right next to the clear tube. If these are blocked the engine won't run right.

Check your coil wire connecters on the right side and make sure they're tight as well as the attached plug wire.

[Bashan]

Yep, good advice from ce. It's a new scooter so you need to set the valves and clean the carb. I know, I know, it's new.....but it's Chinese. If that doesn't clear up your problems we'll go from there. Hang in there, this happens all the time. Rich

[carlster2011]

Thanks for responding to my message. I check the houses and they seem to be clear. I had it running and it was running good like it does and then it happened again it just stopped. This time I'm out of starter fluid (I ran out) so I couldn't get it going again. I'm charging the battery and I'll try it in just a bit. Thank you again again for responding. I'll keep you updated.

[sprocket]

Batteries have nothing to do with the running of the engine... if it is stopping then it is something else

Stalling could be electrical or fuel.. next time it happens check for spark... if you have spark it is likely a fuel problem...

Set your valve gaps also.. just to rule them out as a cause...

[ce]

His filter looks good, it's between the tank and the pump just above the clear tube.

There may be a problem with the vac lines not sucking enough to keep the fuel bowl full, so check all connections from the manifold back. An air leak will disable the pump, which is the silver thingy on the left side of the frame.

You should have a fuel drain screw attached to the CVT cover, it's a coil wrapped tube with a screw in the end, open that screw and catch the fuel in a cup to see if there's any effluvium in the fuel bowl.

Nothing worse for a fuel bowl than effluvium.

If it's clean, tighten the screw and crank the starter til the pump fills up the bowl again, or suck on the vac line of the pump, and that will fill the bowl, then it should start, unless the float valve has gotten stuck, then you have to open the carb for explanatory surgery.

The pump vac line is connected to the intake manifold, and is different from the fuel in and fuel out lines, just give it a sucka sucka sucka sucka and you'll hear the fuel move through the pump, and besides, it's a very good way to get more familiar with your scooter.

[sprocket]

effluvium

Ohoh.. ce is talking Latin again! ;-)

[sprocket]

I think the filter is OK Lefty... the tank is below the pump and the filter is between the tank and the pump pointing with the large end towards the pump...

Could be wrong...

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[carlster2011]

Thanks for all the great advice guys. I've narrowed it down to something between the gas in the tank and the fuel filter. After cleaning the carb, adjusting the values, setting the idle speed and adjusting the fuel mixture it happened again, so what I did is I reinspected the line again and there didn't appear to be anything wrong. So I removed the gas line from the filter and just stuck it into a small glass with gas in it (after killing the battery twice trying to get it to start) and after only two or three seconds it started right up, I was amazed and happy. Next I took the filter off and blow it out from both sides with a compressor. I let the engine run out of gas by taking the line out of the glass (which I was surprised at how long it took to finally run out) then I reattached the filter and the same thing 2-3 secs and it started no problem which is better then usual. So I again let it run out of gas and then reconnected everything. It Started and run for about 2 mins if that and it shut off again, and then would not start no matter what I did. So I disconnected the line again with the filter still attached and put it back in the glass of gas, and wouldn't ya know it 2-3 seconds it fired right up with a weak battery and run great this time I let it idle for a good 20 mins no problems I even tried to see if I could get it to stall out, it wouldn't which it normally would have after idling for that long. So that's where I'm at. I had to stop for dinner. It seems to me that the problem lies somewhere between the fuel filter and the gas in the tank. Any ideas? And thank you all again for the great advice. You guys really seem to know your stuff.

[sprocket]

Replace the fuel lines with something decent like Tygon. They are clear yellow and you can see the fuel flow... also put on a new fuel filter for a gravity feed system like a snowblower riding mower etc....most small engine lawn places have this stuff...

Sounds to me like the cheap Chinese hose may be collapsing inside where you can't see it...

[carlster2011]

Is there just the one line between the filter and the tank? It looks like that's it, but I'm not sure because its hard to see beyond that without taking a crap load of body stuff off.

[sprocket]

Yes..one line..take a flashlight and check in the tank.. it could be something floating in there that is plugging the fuel exit...

This unfortunately, is common, paper, condoms, foam etc..

[carlster2011]

Lol. Thanks Sprocket. I'll do a condom check in the am.

[drjeff]

I found a piece of plastic debris in the tank of my Velux while replacing the fuel regulator, I could go down the road, & the little piece of crap would get sucked into the hole, killing the scooter, pull over to the side of the road and it would start right back up as the little plastic piece floated up.

Very frustrating, I sure am glad that the fuel regulator was bad, as I'm not really sure how long it would have taken me to find it.

[carlster2011]

Yeah, you wouldn't think there would be stuff in the tank, and in my case the thing is only like 2 weeks old with less then 200, miles on it. Its been acting funny since the day I got it though. But at least now the valves are set, the carburetor is extremely clean, the fuel mixture is great and the idle is right where it should be. I'm going out now to change the lines and see if I can find any thing in the tank. This is a really great website that I wish I had discovered earlier, could have saved a lot of time and effort (and gotten stuck here and there a lot less). Thanks to everyone one for all the helpful advice.