Clean the main jet which is the bowl nut. Clean the idle circuit. Might have a screw on side of carb which is idle circuit. Your best bet is buy a new carb, don't store it with any gas and your carb will outlive the pressure washer pump, for sure. If the pump is below the engine, I wouldn't put ANY money into it. Those are junk. Our Briggs rep(s) even admit they are junk. A GOOD pressure washer will set you back around $800 or more. Buy one of those once instead of 3 to 5 of these crapboxes.
The bowl jet has some small holes - its the brass bolt in the bottom. Use a sewing needle to clean - one port goes cross ways through the bolt, the other goes in the middle, and intersects the cross ways port.
There are also 2 holes going through the bottom of the carb, inside where the bowl jet threads. Clean those out - carp cleaner should jet through (watch your eyes!)
Lastly the 2 ports on inside the barrel, on the perimeter of the choke. One leads to the bowl, the other to the bowl jet.
Excellent response. Matches the carb I'm working on to the tee. I can get a (stripped) bread tie wire through all the small holes except the port from inside the barrel to the bowl jet. It's very common for the jet holes in the nut that holds the float bowl on to be clogged.
I'm glad you figured out the problem, and I will attempt your solution too as I am having the same problem on my Craftsman 17.5hp mower. The carb was taken apart one time, but was not blown out to clear all openings. Mine only runs when I put gas in the carburator and quits when the fuel burns out.
Needle is stuck in seat due to the float being out of adjustment. Bend the tang that presses on the needle so that the float can move without closing valve. Look up the spec and adjustment method.
the same exact thing happened to me ,my trash picked pressure washer only ran when i dumped gas into the carb.just had to take the bowl off and clean the jet screw with a sewing needle.caused by stale gas.
I have the same carb and same problem. Which hole in particular was the culprit? Could you show me what the float needle seat looks like? Mine fell out, and I can't locate it. I'm not sure what it looks like to find it. Ugh.
Hey, I don't know if you've fixed your carb problem there but I work on these at the warranty repair center in minneapolis. it is the float plug that the needle sits on. it is made to expand after years of being exposed to alcohol enriched gas. get a carb kit and install the plug champher down into the hole,
Had same /similar problem with an old mower. It turned out that the seal that the float needle closes against was not all the way up. This was not allowing the float to move up freely and thus was cutting off the gas supply. I simply pushed in/ reseated it by pushing on it with an upside down nail. it then worked fine.
Just repaired this problem on an old B&S mower with the exact same carburetor: Fuel was present in the bowl (loosened bottom screw to verify this), but engine still exhibited no fuel problem (verified by spraying fuel into the carb to start engine & keep motor running). SOLUTION FOR ME: there is a very small jet on the side of the downtube (the one that the bowl attaches to) that was clogged. I inserted a needle into the jet and pushed out dirt. RESULT: Runs!!!
looking at a carb I have at home and the one in your video there is quite a difference in how high the float lifts up.Mine is completely horizontal.If the float is not letting enough fuel in the bowl this could be your problem.the float should not have fuel in it.Only the float bowl should .I hope that helps you .
hook a fuel line up with the carb bowl off raise and lower the float. and check for fuel flow.If none remove your float and needle valve and check for fuel flow.this should help narrow down the problem. with the needle valve removed fuel should run through the carb continuously.The float bowl should have fuel in it when everything is working as it should.
@wasatchm i see u fixed the problem, that's great, ur question of fuel being IN the float itself... NOOOOO if there is, that's a problem, there should never be fuel in the floats themselves in a carburator... float BOWL only.. the needle that lets fuel in the carburator, which the floats control is called just that, a needle, what it sits in is called a seat... a set of tip cleaners for a oxy acetylene torch, a air compressor to blow air, and some carb or brake cleaner, are best for cleaning
@sandalanalyst: I wouldn't listen to him. He can't even SPELL carburetor!
forku2umf 5 months ago
Clean the main jet which is the bowl nut. Clean the idle circuit. Might have a screw on side of carb which is idle circuit. Your best bet is buy a new carb, don't store it with any gas and your carb will outlive the pressure washer pump, for sure. If the pump is below the engine, I wouldn't put ANY money into it. Those are junk. Our Briggs rep(s) even admit they are junk. A GOOD pressure washer will set you back around $800 or more. Buy one of those once instead of 3 to 5 of these crapboxes.
forku2umf 5 months ago
Your float is stuck
199854a 5 months ago
Clean out all the jets with a neddle then soak the whole carb in gas for 30 min
FiTz11234 1 year ago
The bowl jet has some small holes - its the brass bolt in the bottom. Use a sewing needle to clean - one port goes cross ways through the bolt, the other goes in the middle, and intersects the cross ways port.
There are also 2 holes going through the bottom of the carb, inside where the bowl jet threads. Clean those out - carp cleaner should jet through (watch your eyes!)
Lastly the 2 ports on inside the barrel, on the perimeter of the choke. One leads to the bowl, the other to the bowl jet.
fargley001 1 year ago 2
@fargley001
Excellent response. Matches the carb I'm working on to the tee. I can get a (stripped) bread tie wire through all the small holes except the port from inside the barrel to the bowl jet. It's very common for the jet holes in the nut that holds the float bowl on to be clogged.
nitedaze1000 9 months ago
I'm glad you figured out the problem, and I will attempt your solution too as I am having the same problem on my Craftsman 17.5hp mower. The carb was taken apart one time, but was not blown out to clear all openings. Mine only runs when I put gas in the carburator and quits when the fuel burns out.
semco72057 1 year ago
Needle is stuck in seat due to the float being out of adjustment. Bend the tang that presses on the needle so that the float can move without closing valve. Look up the spec and adjustment method.
snaponjohn100 1 year ago
needle is stuck
loadi2 2 years ago
the same exact thing happened to me ,my trash picked pressure washer only ran when i dumped gas into the carb.just had to take the bowl off and clean the jet screw with a sewing needle.caused by stale gas.
gokartbuyer 2 years ago
UPDATE: I did fix the problem. I cleanout out all the little holes that fuel travels through within the carburetor. and now it works. thanks
wasatchm 2 years ago
@wasatchm
I have the same carb and same problem. Which hole in particular was the culprit? Could you show me what the float needle seat looks like? Mine fell out, and I can't locate it. I'm not sure what it looks like to find it. Ugh.
MRCHUPKE 1 year ago
Hey, I don't know if you've fixed your carb problem there but I work on these at the warranty repair center in minneapolis. it is the float plug that the needle sits on. it is made to expand after years of being exposed to alcohol enriched gas. get a carb kit and install the plug champher down into the hole,
brh118 2 years ago
Had same /similar problem with an old mower. It turned out that the seal that the float needle closes against was not all the way up. This was not allowing the float to move up freely and thus was cutting off the gas supply. I simply pushed in/ reseated it by pushing on it with an upside down nail. it then worked fine.
larry3086 2 years ago
@larry3086 I just had the same problem. I checked it and sure enough the seal wasn't all the way down in the hole. Thanks for commenting.
dangela424 11 months ago
Just repaired this problem on an old B&S mower with the exact same carburetor: Fuel was present in the bowl (loosened bottom screw to verify this), but engine still exhibited no fuel problem (verified by spraying fuel into the carb to start engine & keep motor running). SOLUTION FOR ME: there is a very small jet on the side of the downtube (the one that the bowl attaches to) that was clogged. I inserted a needle into the jet and pushed out dirt. RESULT: Runs!!!
tentmerchant 2 years ago
Note: Not the holes at time index 2:40! Look on the side of that downtube! It's very small.
tentmerchant 2 years ago
check the float needle
halopersin 2 years ago
looking at a carb I have at home and the one in your video there is quite a difference in how high the float lifts up.Mine is completely horizontal.If the float is not letting enough fuel in the bowl this could be your problem.the float should not have fuel in it.Only the float bowl should .I hope that helps you .
ked123123 2 years ago
hook a fuel line up with the carb bowl off raise and lower the float. and check for fuel flow.If none remove your float and needle valve and check for fuel flow.this should help narrow down the problem. with the needle valve removed fuel should run through the carb continuously.The float bowl should have fuel in it when everything is working as it should.
ked123123 2 years ago
ACTUALLY, there is fuel getting into the float bowl. is the floatl also suppose to fill with fuel? I don't think it is filling up
wasatchm 2 years ago
@wasatchm i see u fixed the problem, that's great, ur question of fuel being IN the float itself... NOOOOO if there is, that's a problem, there should never be fuel in the floats themselves in a carburator... float BOWL only.. the needle that lets fuel in the carburator, which the floats control is called just that, a needle, what it sits in is called a seat... a set of tip cleaners for a oxy acetylene torch, a air compressor to blow air, and some carb or brake cleaner, are best for cleaning
sandalanalyst 7 months ago