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1 Gas spurting out of exhaust when starting
I have an old Bolens mower, Model number 13AM761F065. When I tried to start it today gas came flooding out of the exhaust. I suspected the carb because I've had trouble with this before. My mower came, used, with a replacement carb installed and the original carb. The replacement worked fine until a few weeks ago. It was letting gas to flow through and I could even see gas filling up in the inlet under the air filter. I looked at the float and needle and it seemed fine, but couldn't get the leaking to stop. So I swapped back to the original carb and it worked fine. Until today. Well, I thought to myself, this is probably why they swapped out the original carb in the first place. I get the new carb and make sure the gasket is on correctly, I hook it up to the gas line and power and even when the key is turned on, it is not leaking gas.
Great, I think, maybe it was a gasket issue that is now resolved. I hook it up and... same problem. Any advice?
Ist dies eine gute Frage?
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2 Kommentare
Is this carburetor for a 2-stroke gas/oil mix engine or a carb for a 4-stroke engine? Carbs for regular 4-stroke engines may build up sediment from ethanol mixed in gasoline. Ethanol absorbs moisture to eventually form deposits in passages in carbs. Float type carbs use a needle to maintain fuel level in the carb but if the needle valve builds up deposits, this may keep the needle valve open and flood the carb with excess fuel flowing into the engine. Removing the carb and disassembling it to clean out deposits, seen as white deposits, may restore full carb function when reassembled. There may be youtube videos on small engine carburetor disassembling, cleaning, adjusting the needle float valve and testing.
von F Dryer
I removed the carb, it looked ok to me, but maybe the needle is not working as it should. On the old carb when the needle was bad gas just flooded everywhere as soon as I turned the key on. I found some advice about taking out the plug and cranking it a few times and changing the oil. This is what I did and the mower started, it blew out a ton of gas too.
Now I can start it, but when I try to increase the throttle it dies, with some black smoke. Run kind of rough on idle, but if I increase the throttle more than about a 3rd of the way it sputters and dies. Could I have accidently messed with one of the adjustment screws in carb? I screwed the Philips head one in all the way and then backed it out 1.5 turns.
Another question, while it was running I thought to check the oil and opened the dipstick before turning off the engine. Air was spurting out of the dipstick hole. Is that normal? And I know it's not normal to unscrew the dipstick while the engine was running. I just wasn't thinking.
von Portagee