Question about Mtd 46" Dozer Blade, Fits All & Yard - Man Lawn & Garden
When i crank the mower it runs but rpm goes up and down. Constantly. When I engage the blades it gets really bad. I have drained the gas and changed the filter. What else can I do to fix this??????
I had a similar problem on my 42" MTD riding mower, the vent in the gas cap was plugged up. Replaced the gas tank cap and it fixed it (Lowes sells them)
Posted on Dec 30, 2009
On this engine, another problem that can cause surging is a simple "O" ring that is located under the float in the carburetor bowl. This O ring is included in the carb rebuild kits but you can probably replace it at your local hardware store. The easiest way to access it is to remove the four bolts holding the plastic intake manifold onto the block, and then remove the entire unit. Turn the unit over and remove the two screws that hold the bowl on. Between the plastic fitting in the bottom of the bowl and the center column that fits into it, is where the O ring is located. It is about a half inch in diameter. If you are going to just replace the O ring, you should be able to determine the proper one by taking the plastic fitting with you to the store. The O ring being replaced will likely be very distorted and not useable for a size sample.
Posted on Oct 27, 2016
It sounds as if you have a carburetor problem. When you drained the fuel out of it did you happen to notice if there was any contamination within it? You might try draining the fuel out of the carburetor, alot of carbs. will have a drain plug on the base of the carburetor which can be usually found(providing it is so equipped) near the bottom closest to the mounting bolts. By loosening what is normally a short hex sized plug you'll allow any fuel in the carburetors bowl to drain out. This plug varies in size but normally is about 1/2" in size.Although this method is not always 100% effective you might want to attempt to catch what you drain out if you should see water in it and by draining it this method doesn't cure it , then your probably going to have to disassemble the carburetor one of the passages is partially plugged.
Posted on Dec 05, 2012
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Posted on Jan 02, 2017
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