This ensures that water can not enter into the fuel tank via the vent tube.Visually look at the vent hose to make sure that it is not kinked anywhere or smashed. They’re so dependable, in fact, that we often take their reliability for granted.
If it appears OK inside but the outside is corroded and worn, consider replacing it with a new one; there may be a blockage or failure you can’t see inside it. The purpose of these filters is not only to filter particulate matter out of fuel before it reaches your outboard, but also to separate any water that may be present in your fuel. Anyone have any other ideas, suggestions> Not a good idea. THIS CAN CAUSE FUEL FUMES TO BUILD UP INSIDE … But that still doesn't get you to the top of the tank where the vent line is! More often than not, fuel tank pickups will have screens on them. What happens when a tank vent gets clogged on a W123. If you can’t blow any air into the vent, this is the place to start!Some vents have screens on them which can get salty, dirty, or clog up. A car's fuel tank is much more than a tank with a fuel hose leading to it. Spiders like to spin webs in tank vents you might want to try blowing compressed air from the tank side of the vent line once you carefully remove it from the tank. Then reattached the vent hose to the tank. Some smaller or older outboards may not even have one. With some pressure during taking on fuel, you can force the fuel out and clear the vent; conversely, when the boat is running, a vacuum is created in the tank by the blocked vent and the trapped fuel is drawn back into the tank, thus clearing the blockage. If this can’t be done, then you can try replacing the hose.Replacing the hose could turn into a real headache. Pump out your holding tank. I did not realize there was a low spot in the vent line until filling up on a rough day. On the simplest of outboard engines these are easily replaceable, often installed inline between the fuel inlet and the carburetor. I didn’t see any dips or low spots in the gas vent line.
Wouldn't the filler pipe have allowed it to breathe when you stopped pumping gas in it? Newer, fuel-injected outboards can have as many as 12 of these filters—two or three primaries and one or more for each fuel injector.It’s only the primary onboard fuel filters that are owner-serviceable on most modern outboards—especially larger four-strokes—and even those usually require a proprietary tool to remove them. Their condition can also indicate lurking internal problems, too.
Once you’ve located the filter, give it a thorough inspection. His writing and photography have been published in PassageMaker Magazine, Soundings, Fly Fishing in Salt Waters, Yachting Magazine, and Lakeland Boating, among others.A good set of marine binoculars can add to safety on the water. the fill side of this system is most likely going to be the culprit. You may want to have it professionally filtered, as the presence of too much water can cause engine problems.Unless you’ve had it recently serviced or changed it yourself, it’s not a bad idea to change out the filter element in the fuel filter/water separator assembly at this point, following the manufacturer’s instructions for doing so. It could be dirty fuel and a plugged filter, a problem in the fuel pickup tube in the tank, water in the fuel that was getting past the Racor, an air leak or even a kinked or collapsed fuel hose. I removed the floor board above the tank and, to my amazement, the normally rectangular tank now looked like a balloon! I had that problem once with gas. Your donations keep it running. Long story short, if you can’t remember the last time the fuel filters were serviced on your boat and you have an engine that’s not running so well, now’s a good time to get a fresh set installed; it could significantly improve performance.Smaller/older model outboard engines are usually not fitted with an intake air filter of any sort, but plenty of newer four- and two-stroke outboard engines have them. If you find that it is clogged, just replace the vent port and get back on the water!The vent hose should come off of the vent port fitting, facing upward. Makes all the difference in your experience out on the water. If they get clogged with dust and dirt, this can affect engine performance significantly by starving the engine of air.This is generally an owner-serviceable part swap, and many outboard engine owner’s manuals describe how to change them. The pickup on the tank is clear also. Confirming the location of the issue that is making the boat fuel tank overflow when you are filling it.In order to fix this problem though, you will have to move the hose somehow to relieve the pressure on the hose, taking the kink or smash out of the hose. We have a lot of spiders here in the Delta and I assume it is these critters that have nested in the line. When you open the vent on an expanded tank, fuel vapors will escape. I would not recommend bypassing it but replacing it. But you might be asking why?