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Post by sjfishon on May 24, 2018 9:27:53 GMT -5
Was wondering,I have 2 50cc, one runs smoothly,the other just seem rough,it's ok but bothers me. Have cleaned carb and run middle grade gas,could it be spark plug?I remember with a car how plugs always made it much smoother.thanks steve
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Post by tortoise2 on May 24, 2018 9:52:34 GMT -5
Year, model, 2 or 4-stroke, modifications?
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Post by sjfishon on May 24, 2018 10:03:42 GMT -5
Its a 2015 Bashan 4 stroke,50cc renegade.
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Post by tortoise2 on May 24, 2018 10:12:25 GMT -5
2015 Bashan 4 stroke,50cc renegade. Check valve clearance . . and consider CDI and ignition coil as wear items (avoid performance replacements).
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Post by GrumpyUnk on May 24, 2018 10:49:13 GMT -5
Things that make engines run 'rough', off the top: spark plugs, CDI, coil, water in the fuel, water in the float bowl, valve adjustment, spark plug wore, sticky valves, fuel metering set wrong, clogged jets, plugged or restricted air filter, plugged/restricted air intake. Most common are contaminated fuel, plug wires leaking spark to ground, plug gap, fuel:air ratio mix, and add sticky float, starving or flooding the engine alternatively. Plugged fuel filter or tank outlet also add, as does a gummed up or plugged air vent to the fuel tank. No vent== restricted or no flow of fuel. tom
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Post by sjfishon on May 24, 2018 18:04:42 GMT -5
Thanks all,esp,Tom,you gave me a few ideas.I will check.thanks steve
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Post by sjfishon on May 25, 2018 9:03:12 GMT -5
Have mot ran yet,but I did find.the plug wire was tied to the frame.got it off,checked the fuel cap vent,it's open,will try it today,.I know it still,has last year's gas,but I did ad stabil before winter Will get back.steve
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Post by GrumpyUnk on May 25, 2018 10:49:44 GMT -5
I would suggest that 'last years gas' should be drained, and fed to a large-tanked vehicle, mixed with a good bit of what's already in the tank. Say, a pickup truck with 10 gallons on board. Diluted, and with a multi-cylinder engine it will be consumed without problem. Small singles need the freshest fuel you can get. Easier to get started, better running cold, and less chance for condensate to be fed to the carburetor. Stored fuel can get contaminated by condensation as the temperature rises and falls, with air exchanging in/out of the tank as the temperature changes. Add some humidity, and you'll get water droplets condensed at the bottom of the tank, where the fuel falls out to feed the carb. I'd drain the tank completely, and make sure there's no water, perhaps use HEET or other alcohol to abosorb the water if there is any. Use fresh fuel. You will be happy you did. I suggest to anyone using a power lawn mower that they pour their older fuel into their vehicle tank, and replace the fuel if it is more than a few weeks old. Much easier to start with fresh, as the more volatile components evaporate first, leaving behind fuel that is harder to get 'lit off', making startup more difficult. Same thing applies to scooter engines... tom
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