150cc not recieving gas By accord911 (Read 1,183 times)

[accord911]

hello i also have 150cc roketa i can spray some quick start fluid in the breather and it will start but not stay running. I can the carb over and over no different, so i ordered a new carb, it still won't start. I was wondering do any one think it can be the intake monifold. thanks ernest

[jct842]

Have you checked to see that the carb is getting fuel? Also when is the last time you checked the valve clearance? The carb does have a drain that you can open to prove there is fuel. Whether you have a pump or a petcock they are both operated by vacuum.

[tvnacman]

Is the had tank above or below the carb?

John

[tvnacman]

Keys get this figured out, I have all parts for both style fuel systems.
John

[JR]

List of possibilities;

If the manifold is broke it would have to be broken severly to keep it from at least trying to start, since you sprayed fluid in it and it'll run for a moment I'm doubting this.

Whether it's a fuel petcock or fuel pump both can go bad and if they have broken vacuum lines to them then no fuel so check all your lines.

Clogged fuel filter.

Extremely dirty air filter.

And as others mentioned needs the valves adjusted.

JR

[accord911]

yes the new carb is getting fuel, the bowl was full. I loosen the drain screw and fuel is coming out. This is a brand new carb. I also have a clear fuel filter and gas is pumping through it. Everything is new lines, fuel filter. I just didn't check the air filter. It's a four stroke air cooled. JR you mention valve clearance how do I check that. I have no idea, but would like to find out. Also when i removed the new carb. you see a little fuel at the intake where the carb is installed, but the spark plug is dry.

[tvnacman]

no more starter fluid , use carb cleaner or small drops of gas .

thescooterprofessor.proboards.com/index.cgi?board=engexh&action=display&thread=321

there is a video around somewhere . I can't find it at the moment .



John

[alleyoop]

Adjust the TOP INTAKE to .004 inchs and the BOTTOM EXHAUST to .005 inchs.
Alleyoop

[accord911]

thank you for the video on you tube i'm confused one video says .0019 intake and .0024 exhaust for an 150cc scooter i don't have a manual its a roketa 150cc

[gatekeeper]

As Alleyoop says, go .004 inch for the top (intake) valve and .005 inch for the bottom (exhaust) valve.

[accord911]

Thank you guys so much, the scooter started up so now i just have to put the plastic covers back on. You guys are the best thanks again ernest.