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I bought a new carb, installed it and have gas pouring out of all three vent lines. Tried adjusting the float, but still pumps gas out of the overflow. Could the pulse fuel pump be over pressurizing the carb? GETTING TIRED OF THIS!
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Vince, you can't run the engine without the fuel pump. Is it the stock pulse fuel pump? Is the diaphram in the fuel pump good or is it worn out? Also, just to be safe you might want to run new fuel line and a new fuel filter, as well as clean out the fuel strainer/screen that's attached to the fuel pickup line inside the tank.Originally posted by Vincent View Post"Looks like you have a problem with your 4 wheeler........you're missin' two wheels there"
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I've seen this happen to me on several different engines (16hp briggs v-twin, 18hp briggs opposed, and 23 hp Kohler). I only noticed it when the air filter was off and running through the rpm's. I've always thought that it was normal for just a little bit of gas to spit out. Is it backfiring, hard to start or stutters? I guess the question is,, are you sure that you are running rich? Along with doing what JP suggested, I would also pull and read the spark plugs, (not sure if you can get a good reading from a two-stroke, but hey!) Good luck with your findings, I hope its nothing major!HUSTLEMANIAC and a HONORARY MEMBER of the
BIGFOOT ALUMNI
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Hey Vince,Originally posted by Vincent View Post
It sounds like your needle isn't sealing against the seat well in the carburetor. Even though the pulse pump operates at very low pressure, it has the ability to push fuel past a (even slightly) worn needle/seat. It's a very easily replaced, and cheap item. The only problem, is that I'd suspect your engine to be getting a bit too much fuel under these conditions, and it'd start to run rough. I don't think the VM28 (going from memory) on the 295 has overflow tubes, so I'm guessing the gas is coming right out of the bowl vent.
As long as the engine carburetor is mounted level (guessing it is if it's the stock 295 setup), you're running a stock pulse pump, and the needle/seat are in good shape, the problem shouldn't be there. It's tough to actually "see" if it's worn. Some of the smaller Mikunis had a neoprene rubber tip that would aid in sealing against the seat, but some don't. Check to see if the neoprene is present on the needle, and what its condition is...
Let us know what you find out...sigpicComment
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Thank you for all the good ideas. I have already rebuilt the carb and still have this problem. The rebuild kit came with a new float jet valve with the rubber tip. If I blow into the fuel inlet and push up on the float the air seems to stop completely with a good seal. The fuel pump is pumping a good supply of gas and I replaced the fuel filter at the same time I rebuilt the carb. The problem seems to be too much fuel, or the float valve is not cutting off the gas enough thus causing the spitting out of the top of the carb. Anyone had the gas coming out of the top of the carb? This carb does not have any hoses to bleed off any overflows, also, the gas seems to be coming out of the inside of the carb somewhere because it soaked the airfilter.
Help before I do something crazy like buy a 16 horse four stroke and dump more money into this thing.
Thanks VinceComment
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Is the float bent so its set too high or does it have a pin hole in it???l like to buy stuff and no I don't do payments!Comment
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This carb has two floats and two arms leading out of the needle/ hinge. Boath float seem sealed, without leaks, and the arms they touch seem straight. I think I see what you are getting at with those suggestions! I will pull the carb and bowl and check the floats and arms. Have you had experience with a similar problem on this type carb?
Thank you, everyone! VinceComment
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