Any suggestions on what the problem may be? By caz (Read 410 times)

[caz]

Hi All!

My neighbors 150cc Il Bello wouldn't start so I am working on it. Here is the problem..

Scooter doesn't start - keep trying, battery dies eventually.
I jumped it from my scooter - still wouldn't start but with continued trying, it eventually starts. When it starts, it cuts right out unless I hold the throttle open for a few minutes. Then it runs like normal. Can cut it off and restart it no problem. Until its been off for a while and cooled down.
If I take the choke out and plug it with my finger, it starts right up.
I got a new autochoke since it doesn't seem to initially let the right amount of gas in and still doesn't work. I tried the (working) choke from my scooter, still no joy.
I disconnected the choke, plugged the hole and started it up. The wire was reading about 3 volts at idle so power is getting to it..

I am at a loss.

Any ideas what to check next?
Thanks so much for any input!!

[cyborg]

My guess is fuel issue,,,taking out the choke and running it with that fuel circuit open means youre not getting enough fuel,,,,pull the carb and take off the bowl i think you'll find jets are plugged

[caz]

I was hoping I wouldn't have to.
I've put some seafoam in there. Any chance that will sort it?
Would it run fine once warmed up though?
Thanks for the advice. I'm off to watch a video about removing the carb

[Bashan]

You also need to set your valve gaps to .004" intake and .005" exhaust. There's tutorials on the engine board in the Library.

[caz]

Thank you

[Guitarman]

You might also have crud built up in the gas tank that's blocking the lines or clogging the carb.
Best to clean the tank also.  And the fuel pump could be on its last leg.  See how much pressure it gives.

[caz]

The carburetor jets are now cleaned out. Still not starting.
I've ordered a new fuel filter. I know I should have done that earlier but I could see fuel moving in there.
I'm not sure I have any idea how to clean the gas tank out. Will read up on it now.
Thanks for the input
I will get this thing running just as it is time to out it away for the winter. Just you watch

[Bashan]

Get a new carb instead of chasing individual components. They run $25 to $45 and are readily available.