I have a 1979 Merc 50 it has ran great for the last 4 seasons. End of last year things went down hill. The motor began to spit gas from the lower carb out of a 1/8" brass hole to the upper right of the choke butterfly. I decided that it was time to rebuild the carbs. I did and found alot of dirt particles. So I traced it back to the pick-up tube in the metal gas can were someone had replaced the screen with a lantern mantel ziped tied to it 
. So I fixed that added a inline fuel filter after the bulb also replaced the gas line going to the pumps. Full rebuild and clean. I have run the motor flawlessly for the last two weeks and low and behold sunday out of the blue it does the same thing? Any possible answers? <br /><br />My thoughts:<br />I believe this hole is an overflow for the bowl.<br />1. Maybe I missed a spec of dirt and is blocking the needle valve?<br />2. Bad float?<br />3. I did not see a seat for the needle could it have groved the body and it rotates till it gets stuck in it?<br /><br />Any ideas would help
. So I fixed that added a inline fuel filter after the bulb also replaced the gas line going to the pumps. Full rebuild and clean. I have run the motor flawlessly for the last two weeks and low and behold sunday out of the blue it does the same thing? Any possible answers? <br /><br />My thoughts:<br />I believe this hole is an overflow for the bowl.<br />1. Maybe I missed a spec of dirt and is blocking the needle valve?<br />2. Bad float?<br />3. I did not see a seat for the needle could it have groved the body and it rotates till it gets stuck in it?<br /><br />Any ideas would help