Fuel Tank Cap Vent Is Clogged

Not only can this boat fuel tank vent cause issues when filling up but it can also starve the engine of fuel and leave you stranded.

Fuel tank cap vent is clogged. The tank vent cap needs to be cleaned occasionally for the carburetor to work properly. Gasoline expands in volume as it warms up and shrinks in volume as it cools down. A blocked vent pipe to the car s gas tank can be a real problem. If the fuel cap vent is clogged air won t be.

Is the fuel tank vent clogged at the fuel tank fitting. To make up for this the fuel cap uses a small vent to allow air to enter the tank. If your motor runs for a few moment and then dies but starts back up this tip may be for you. For anyone that doesn t think the lift pump on a om617 can practically suck a golf ball through a garden hose here are two pictures of my fuel tank when the vent became fully blocked for some reason on a 3 200 mile round trip.

What happens when a tank vent gets clogged on a w123. When this line is. As fuel is consumed by the engine the level in the fuel tank lowers. With the hose off blow on the other end and see if air comes out.

Modern vehicles have a vent hose that is part of the fuel system. Unhook or unscrew the carburetor box cover on top. Most people are not even aware such a problem can occur or what it might lead to. In order to breathe your tank must have a vent somewhere that will relieve both vacuum and pressure.

Step 1 switch the stihl chainsaw s master control lever into the stop position and set the saw on a flat workbench. Your tank has to breathe. Once you get to these hoses remove the vent hose which is most commonly a 5 8 vent hose. Find the access to the fuel tank fill and vent fittings on top of the fuel tank.

This stops the flow of fuel to the carburetor causing the engine to stall. The tank vent cap sits on top of the fuel tank and allows these heated gasses to escape. Able to enter the tank and a vacuum or vapor lock will occur. A fuel cap that does not vent properly may cause your engine to not run p.

In this video i show you an easy way to check if your fuel cap is venting properly. A car s fuel tank is much more than a tank with a fuel hose leading to it.