Small Engines (Lawn Mowers, etc.)/Pressure washer carb leaking oil
QUESTION: Hi Eric,
I have a B&S 6hp engine on a craftsman pressure washer, model 580.752300. I bought it used and it had old gas in it. Ran fine but leaks oil from the air filter. Oil level is fine. I changed the oil. I hear the float could be stuck. Wouldn't be surprised but not sure how that causes oil leaks. Anyway, I want to attempt to clean the float. I've worked on a holley 600 before but not a small engine carb. The air cleaner housing blocks access to the bowl. I assume I remove that and then the bowl. Anything I should be aware of when disassembling these parts. Will the float be adjusted after reinstalling?
Engine info: family: 1BSXS.1901VF 275228
Engine starts fine when cold but has trouble starting when hot which leads me to believe its flooded
ANSWER: Those are carbs are really simple. However, make sure pay attention to the carburetor connecting links/rods/springs. I take a picture before removing the carb.
The oil you see may be coming from the valve breather. Take a look at the link below to locate the Briggs engine model:
Send me the Briggs engine model so I can look up your engine.
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QUESTION: Thanks Eric
I think it's:
ANSWER: The oil in the carb or air filter may be coming from the valve breather. Too much Oil can get in the breather either by too much engine tilt, over filled with oil or the wrong weight oil. There are two drain holes in the bottom of the breather to allow oil to drain back in to the engine crank case. Oil can get into the air filter/carb through a tube that connects the breather to the air filter base. You can clean the breather by removing the muffler and then the breather. Clean with carb cleaner. While the breather is off clean the tube as well with carb cleaner. You are just trying to get any excess oil out of the breather tube.
Here is a video on carb cleaning:
I use a pick to remove the inlet needle seat or another (safer) method to remove is to just put some 30 weight oil in the carb fuel nipple and then use an air compressor to blow out the old seat. The oil acts as a hydrolic pusher to blow the seat out of the carb.
When installing the new seat I spray the new one and the carb inlet needle housing with some WD-40 making it easier to install.
The float is not adjustable. When the seat is installed correctly the float should be approximatly horizontal or level when you hold the carb upside down.
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QUESTION: I removed the breather and there was a lot of oil on it, its gasket and on the tube to the air filter. The hole at the top, behind the breather...looks like where the metal tube connects. Can you confirm? Spray carb cleaner in there and spray the breather, correct? Any reason to replace the breather?
All sounds correct. You can replace the breather but I would try cleaning first...we rarely replace breathers. I'm betting the engine was just tilted too much and too much oil got in the breather and cound not drain out the of the bottom 2 breather holes fast enough before the engine was started.