Symptoms of Water in a Carburetor

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Water in your vehicle's carburetor can cause serious problems. Water will prevent the fuel from properly combusting in the engine and can cause your vehicle to run badly or even not run at all, depending on how much water is present in the carburetor. There are several ways you can wind up with water in your carburetor; one of the most common is accidentally using watered-down fuel from a gas station that has water in its fuel tanks. You can also get water in your carburetor by leaving your hood open in the rain or by driving though a flooded area. If your carburetor has water in it for too long, it will rust and you will have to replace it.

Rough Idling, Bogging and Surging

  • The carburetor's job is to create the ideal fuel mix for your motor and supply your vehicle with the proper amount of fuel. If the carburetor is supplying your vehicle with watered-down fuel, or just has small droplets of water mixed in occasionally, your vehicle will be getting a mixture that does not burn effectively in the motor. It will cause the motor run badly, bog down when accelerating or surge as the vehicle alternately receives good fuel and fuel with water mixed in.

Damaged Float

  • The float in your carburetor may be damaged by water in the fuel. This tends to happen more frequently if you live in a cold climate and the water manages to freeze inside the carburetor and dents or damages the float. You must remove the carburetor from your vehicle to check the float, which controls how much fuel enters the carburetor and is used by the motor at one time. Check the float for damage if your vehicle seems to be getting too much fuel or too little.

Won't Start or Run

  • If there is a large amount of water in your carburetor your engine will not run at all. Engines require a combustible substance in order to start up and fire; since water is not combustible, too much of it will completely prevent the motor from operating. A large amount of water can enter the carburetor if the motor is accidentally submerged, which can happen if you drive through a severely flooded area, attempt to cross a creek offroad or get in too deep when you are launching a boat or canoe into the water. This can also happen if the vehicle's hood is up when it starts raining.

Rust

  • If your carburetor is rusting, you can bet it has been exposed to water at some point. Several pieces inside the carburetor can rust and cause different symptoms; check for rust if you are having any kind of carburetor problems.

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