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Post by sims9316 on Nov 8, 2017 9:51:53 GMT -5
My 2008 49.5 or 50cc Roketa is have major issues. I have solved the starting issue with a new Carburetor, intake manifold, vacuum lines, fuel line, spark plug, ignition coil, fresh gas, fresh oil change, but I am still having a major issue with my scooter starting and stalling out after a few seconds of running, or I can get it started and idling fine. BUT as soon as I apply any throttle at all it just dies. Can anyone help me?
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Post by tortoise on Nov 8, 2017 12:03:15 GMT -5
2008 49.5 or 50cc Roketa . . issue with my scooter starting and stalling out If a 139QMB 4-stroke . . valve clearance? |
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Post by sims9316 on Nov 8, 2017 12:06:42 GMT -5
I am on the way now to buy feeler gauges and im going to adjust my valves. Ill will report back with the results.
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Post by grumpyunk on Dec 17, 2017 12:36:10 GMT -5
I would suspect fuel supply. The valve adjustment would not make it start & die almost immediately. If the fuel flow was a bit slow, it might starve the carb of fuel, causing stalling. If the vacuum operated valve doesn't open the flow, you will run on the fuel in the float bowl on first start, then vacuum from cranking or running will(should) open the fuel valve, and allow the float bowl to fill properly.
Disconnect the fuel line before/after the filter, and place a catch bowl/can in place. Crank the engine over, and the flow should start within a few seconds(given the cranking generates enough vacuum) as the control valve opens. If not, check the valve(and maybe filter?)
tom
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Post by 125scooterbro on Jan 26, 2018 10:35:00 GMT -5
My 2008 49.5 or 50cc Roketa is have major issues. I have solved the starting issue with a new Carburetor, intake manifold, vacuum lines, fuel line, spark plug, ignition coil, fresh gas, fresh oil change, but I am still having a major issue with my scooter starting and stalling out after a few seconds of running, or I can get it started and idling fine. BUT as soon as I apply any throttle at all it just dies. Can anyone help me? ay bro have you fix it? |
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