Engine running rich. Installed new plugs, cleaned out carb., reset float, put in fresh gas, cleaned both coils and set legs from flywheel at 10 thousandts. What can it be
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First dump the old gas and put in fresh. Clean or replace spark plug.
Put a squirt of starting fluid in the carb. If it fires the ignition system is good. Do this a few times because there is still old gas in the float bowl and fuel line. When the fresh gas gets to the carb it will stay running. If it did not fire with starting fluid the points and condensor will need to be replaced and maybe the coil.
if you replaced the diaphragm and gasket below the carb and are completely positive they are installed correctly and not damaged, then the carb is defective and they usually warp or the primer system goes bad
Yes, the floats may be causing the fuel level in the carb. to be too high. The black plugs indicate running too rich. Clean the plugs and check the fuel level.
Ensure fresh gas is in tank. Follow gas line from tank to carb. Have locking pliers ready to pinch off gas line or close gas line valve. Remove gas line from carb. observe gas flow to carb. Remove carb bowl from bottom of carb. Attach gas line to carb. Does gas flow to carb. Observe float, float down gas flows, float up no gas flow. If float is bad replace float assembly or carb. Remove float mounting pin and needle metering valve. Use a bread wrapper pealed back an inch so thin wire can clean out port of meter needle. Use wire to clean out center port. Observe bowl screw look for hole thru screw, clean out with wire if preset. Re-assemble carb. Clean replace air filter. Fill oil. 30w. Prime motor, pull rope 10 times to start. No start, replace carb.
Hi Chris,
You will have to recheck the float level (in the float chamber) of those two carburators, reset if necessary.
You may also have to reset the air-mixture screw for both of those carbs. Standard procedure to set htem is tighten them all the way in making sure not to over tighten to avoid damaging the sharp end of the screw, and thn to open 2 and a half to 3 turns.
You can thn reset them as the engine is running + -- either way.
Hope this helps!
Sooted plugs proves tht the air-mixture is too rich.(too much fuel going to the combustion chamber)
You have to set the air-mixture screw on the carb/s.
Clean the carb/s, replace 'inline' filter , if you don't have one ..install one, reset float level.
It's better to also check the valve clearance too.
Fit in new plugs (gapping them to specs.) and run the engine to its normal temperature thn set the air-mixture screw...standard setting....all the way in i.e. tighten it slowly to the end making sure not to damage the tip of the screw, thn 2 and half turns outwards to 3.
Start the engine....run to normal temperature and thn reset the air-mixture screw +/- either way.
Hope this helps!
the engine is not getting enough gas. when you hold down the primer you are bypassing this problem. to fix this simply adjust the carb's fuel screw, located on the side of carb, a little at a time until runs smoothly.
Hi ,
Your bikes engine is running too rich !! , you will have to set the air-fuel mixture ratio.
Try to check the air filter it may be too dusty and kinda clogged thus not allowing air to go in.
If all is ok thn you may have to clean the carbs and reset the float in the carbs.
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