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Post by thxcuz on Apr 4, 2017 18:43:32 GMT -5
I have a 150 with the petcock on the bottom of the tank. I had to eliminate the pair stuff due to replacing the head. Now I'm a bit confused what goes where. I have 2 nipples on my petcock (the 7th grader in me is giggling uncontrollably right now) one obviously goes to the carb and the other I have blocked. I also blocked the nipple on the intake. Fuel is not pumping from the tank to the carb. I'm sure there's more to it but there are tons of hoses and t's and y's. My fifty was simpler with a lot less Speghetti inside.
Before I do away with the petcock completely I want to make sure I have everything hooked up right
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Post by oakleyscoot on Apr 4, 2017 19:43:16 GMT -5
I believe you need to un-cap those two nipples you have blocked off and put a hose on them.
One of them on the petcock and the other on the intake.
This provides the vacuum to open the petcock and allow fuel to flow to the carb.
gravity feeds the carb, the carb does not pull it from the tank.
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Post by FrankenMech on Apr 4, 2017 19:44:51 GMT -5
One line goes from the petcock to the carb for fuel delivery. Another line goes from the petcock to the intake for vacuum.
Make sure you use a filter in the fuel line.
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Post by thxcuz on Apr 4, 2017 19:48:27 GMT -5
Tried that. No luck. I wonder if I have a bad petcock. I'm using clear lines. I'm not seeing anything go through. Or maybe I have my nipples mixed up. Which one is fuel and which one is vacuum.
I wonder if my valves need adjusting?
I does fire on starting fluid
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Post by oakleyscoot on Apr 4, 2017 19:57:45 GMT -5
maybe you do have a bad valve..
if you have a clear line on the vacuum side you will not see anything ( its a vacuum ), if you have it on the fuel side, yes you should see fuel.
Generally, the higher nipple on the shutoff valve is the fuel side, the lower is the vacuum side.
Tip:
Remove the fuel line from the carb and place end into a container.
place a line on the lower side of the valve, suck on it and observe if fuel is going into the fuel side (clear hose ) into the container.
If it is then check your intake vacuum side for the problem ( you have no vacuum ).
If it does not flow, then you have a suspect fuel valve. Re-check, if same results, chances are you have a bad valve as vacuum does not release fuel from the tank.
by the sounds of your problem you have a fuel supply problem.
my .02¢
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Post by pinkflames420 on Apr 6, 2017 14:40:18 GMT -5
As Oakley stated, it will be fairly simple to put the fuel line from the petcock into a container and suck on the other line(vacuum line) to see if fuel comes out the OTHER HOSE into the container.... if fuel flows, peacock is good. Don't worry, you won't be getting any fuel into your mouth. Members with vacuum petcocks like to suck on the vacuum line to get fuel to the bowl, to lengthen the life of your starter. In the pic, the top opening will be the vacuum line , the one you suck on. When looking at your bike, it'll be the opening on the "bottom" of the petcock. I would post your results , or move onto the next line of defense when it comes to fuel delivery, which I believe to be the float assembly if the petcock is good to go.(fuel flowing into container)  |
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Post by FrankenMech on Apr 6, 2017 19:50:40 GMT -5
Sucking gas into your lungs is very bad. Don't ask how much the ER bill for that was.
For testing things like petcocks etc I use a Mity-vac test unit, brake bleeder, from the parts store.
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Post by thxcuz on Apr 6, 2017 20:20:25 GMT -5
I think part of the problem is that I had to remove the oddles of tubes because my new head doesn't have erg. I can't figure out what needs to go Where and what has to be plugged up. I may to the plumbing supply place and get a brass fitting and replace the whole petcock. I have a shutoff valve from the lawn and garden department.
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Post by FrankenMech on Apr 7, 2017 18:11:18 GMT -5
It is always best to figure out what each part is for and how it works before removing it. Every part has a function or it would not be there.
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Post by thxcuz on Apr 7, 2017 18:18:41 GMT -5
It is always best to figure out what each part is for and how it works before removing it. Every part has a function or it would not be there. It was tore up and headless when I got it |
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Post by FrankenMech on Apr 7, 2017 18:37:39 GMT -5
A basket case is always trouble. A full understanding of how things work is required.
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Post by AtariGuy on Apr 7, 2017 21:07:32 GMT -5
A basket case is always trouble. A full understanding of how things work is required. Someone once told me this. Then i bought a parts scooter. I'm still trying to understand things... |
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Post by thxcuz on Apr 7, 2017 21:22:56 GMT -5
There's no fun in having something just work. If I didnt want a project I would have spent more than 100 bucks on it.
If I learned anything from my bachelor days it's that though they can be trouble,basket cases are the most fun.
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Post by greggkinney on Apr 8, 2017 11:44:34 GMT -5
Sucking gas into your lungs is very bad. Don't ask how much the ER bill for that was. For testing things like petcocks etc I use a Mity-vac test unit, brake bleeder, from the parts store. please be careful! ive know kids that have became habitual gas heads |
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Post by pinkflames420 on Apr 8, 2017 14:06:57 GMT -5
Just pinch the end of the vac line with some vise grips 🙂 After you quickly suck on it.... I learnt that from pinkscoot , I guess common sense didn't hit me here  Let us know! Take some pictures, give us MOOOORE! Or atleast give these guys more! |
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