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Post by william42 on Apr 13, 2014 7:26:43 GMT -5
I put the loop in the hose because there is only so much room to run the vacuum lines and any other way they threatened to kink on me.
I pulled the plug last night and it looked ok to me and it also had plenty of spark. With the plug out I put my finger over the plug hole and hit the starter. I had plenty compression and suction so I should have plenty of vacuum in the lines.
The plate riveted to the frame says the valve clearance should be .006-.008 so I reset them to .007. Then I put it away for the night.
I just went out there and it started right off and ran for .5 seconds. (a half a second). It won't keep running for nothing. It tries to run but won't. The third time I tried to start it the starter was the only thing going. Nothing else.
So, I have spark, I have fuel in the float bowl (because I just drained it to see), and I have good compression (so I assume good airflow). Yet now it doesn't even start. What am I missing here? I had intermitent problems that slowly got worse, then it failed altogether. ?
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Post by william42 on Apr 12, 2014 23:30:54 GMT -5
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Post by william42 on Apr 12, 2014 15:47:24 GMT -5
I adjusted the valves last night after I read your response on the other thread alleyoop. After I did that it started up and ran GREAT! Then I took it for a ride and got stranded 3 miles from home and it wouldn't start up again for two hours.
This morning it started great again and after running it for about a minute I drained the float bowl just to see how much gas was in it and it didn't seem like very much. Maybe an ounce or so, if that.
After putting the carb and fuel pump back in I rerouted the vacuum lines so they would be straighter and run more direct to their respective ports. In other words, I shortened the two of them. I also replaced the fuel line from the pump to the carb.
Now when I start it I have to keep it at half throttle or it'll die. I either did something wrong or the problem got worse on it's own. Grrr...
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Post by william42 on Apr 12, 2014 9:41:57 GMT -5
I'm going to start a new thread on my scooter problem because it won't let me reply to my original one here itistheride.boards.net/thread/5668.
I am of the opinion that I have a fuel delivery problem and that my float bowl isn't being kept full. I made a video of my research to the problem. What do you think?
Now I don't know how to test the fuel pump but by blowing in the inlet port I get free flowing air in both directions. By blowing and sucking on the vacuum port I can feel the diaphram tightening in both directions. That is, I don't think it's ripped.
I might add that my fuel tank is below the carburetor so the fuel pump has to pump fuel up to the carb. By the video were do y'all think the problem lies?
Thanks in advance for any input.
Bill
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Post by william42 on Apr 11, 2014 9:05:07 GMT -5
I have 170 miles on my BMS Heritage 150cc w/GY6 clone engine. On the second tank of gas (which is half empty now), the engine started stalling when cruising. It just dies out. At first, it would catch again and I could gain speed again and it would work fine, but now it slows me down to a full stop and it takes awhile to start again. It's always been a hard starter since day 1, the first thing in the morning. I always have to stay with it until it warms up, but then it will stay running. I upped the idle rpm's a bit and that seemed to help some. I was looking at it this morning and after it warmed up and I hit the throttle hard it wasn't as responsive at it should be. It stalled a little before reving up. Even giving it about half throttle it seemed to take a few seconds to get to the rpm's it should have gotten to right away. It isn't always in it's "mood" but when it is the idle rpm's are low and the engine will eventually die. It'll start right back up, most of the time anyway, but I again have to play with the throttle to keep it running until it get's out of it's mood. Once in it's mood, however, it usually stays in it's mood and doesn't run like it should. Anyone know about these engines and their inherant problems? Thanks in advance for any help you can offer. Bill Well, for some reason it won't let me reply to my own thread but it will let me edit it so I'll post my findings this way... I adjusted the valves tonight. The intake was at about .035 and the exhaust was way tight. I set them carefully to .004 as suggested by alleyoop. I hit the start button and it fired right up like it never has before. Oh yeah! It idled fine, then slowed a little, then sped up again. It sounded like, if I understand the system correctly, that the enricher was doing it's thing but it wasn't idling at a constant speed. Nonetheless, while it was warming up I threw on my gear and headed out for a test ride. Same deal as before. It just died about three miles from home and this time wouldn't start up again for nothin'! I sat on the side of the road for about two hours trying to decide what to do. After many, many failed atempts at restarting it I shook the bike back and forth, I suppose out of desperation, and I got it to fire, and eventually start. I took off for home but didn't go over 40 mph. I think I'll pull the carb in the morning and see what I see. Maybe the float is sticking or something.  Thanks for the help so far... |
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