If you suspect that your vehicle has a vacuum leak, read on to learn the most common symptoms, as well as how to fix them. Be careful, liner causes issues. And it can break free (delaminate) from the outer hose and twist itself up. It’s fabric-reinforced and one-piece construction—no “liner” to collapse and stop fuel flow. The hoses with the grey outside coating (UV protection) seem to have more problems than others. Vacuum leaks occur between the cylinder head and carburetor slide/butterfly, where the low pressure will draw in air through the leak area. just dont forget.as they will only last What is causing the rise in outboard fuel line problems? Finding Outboard Fuel Pumps, Filters and Lines. Some leaks will do both. . This is where the fuel is being sucked and air can be sucked in anywhere that isn’t tightly sealed off. Then check the pickup tube in the tank — make sure there are no blockages. From the symptoms you describe, it sounds like you have an air leak in a fuel line. . It does not appear that the filter housing has any air leaks now. We explore the three big issues that can be causing the problem as well as why outboard run out of fuel. I'm pretty sure I've got a leak somewhere in the fuel lines, when the engine is cold is runs rough for 5-10 seconds before smoothing out. and learned a ton about what does and doesn't work! If attempts to turn down the idle speed adjusting screw have failed (old-make carburetor), it means the blend of air to fuel ratio has changed in favor of too much air passing into the intake manifold. Turns out, these new hoses have a “non-permeable liner.”. What causes vapour and air leaks? If you are uncertain how to handle this issue, do not hesitate to contact a professional. I’d say you have an EXCELLENT blog! These issues … That confirmed a blockage. I forgot: Thermoid hose is (relatively) cheap @ $17.00 for 25 feet (with free shipping). [More] Forced Flexibility, Are you a new cruiser having trouble sleeping? If you have a fuel water separator with a … My question is how to locate the venting method which is used on my boat and how to test it. … The last chronic "air leak" I hunted down turned out not to be an air leak at all but loose fuel tank scale clogging the screened pickup pipe deep in the tank. The Vacuum Method (Fuel Unit Test) Disconnect supply line at the fuel unit. The fuel pump will pull air into the fuel, and pump it through the system, up to the carbs, through the needle and seat, and into the carb bowls. Do I need to wrap the threads on the tank fitting when replacing? The change could be as noticeable as … All the more reason for a spare. Many thanks, I finally got it started and took off, got about 400yd away from the dock, stopped to get something in the boat and the motor died. This happens over and over again, because many quick-disconnect fittings that attach the fuel line to the outboard are just plain cheap. The Resource Center has four FREE mini-courses to guide you to just the info you need, whether you’re discovering what living on a boat would be like, preparing to cruise, overwhelmed with the first-year learning curve, or needing help with cooking aboard. found this simple fix that my mechanic didn’t check properly. I don’t remember the exact designation of the hose, but I remember when buying it that it was supposed to be okay for use with ethanol gas. Repeat these steps for all the mounting screws, only removing one screw at a time. preparing to cruise • overcoming problems. If air gets into the fuel system then the lift pump is pumping fuel and air to the VST. Don't Pay for NEW FUEL RAILS at OEM Prices! Either the lift pump has failed, the boat is out of fuel or there is an air leak or blockage somewhere in the fuel lines running fuel from the tank to the engine. Would drip out of the bottom of cowling and into the rear of boat. Click here. Hook back to tank from boat and does the same thing again. Blow into 1 end of the tubing and look for any bubbles in the water. Quite possibly insufficient fuel to run the motor. Check to make sure there aren't pinholes in your fuel tubing. On any line older than 5 years, the sun causes the bulb, rubber end connector inserts, and fuel line to age, shrink, harden and crack, leading to tiny air leaks that prevent the fuel pump from pulling gas into the motor, especially at idle. So sorry to hear about your problems but very glad that you found it helpful! 1 – Automotive fuel hose is NOT approved by the USCG. New rubber DIAPHRAMS from ThePelicanServices.com will cure and correct these symtoms. After that its fine. I own a 1995 seaswirl stripper i am not getting any fuel to both squeeze balls changed the anti syphon valve and changed out the water separator still no gas coming to the motors any suggestions also changed both fuel balls and lines at motor. Any air in the system needs to be vented (bled) before the engine will operate properly. Vapour has two main causes. If I run the truck they flush away into the system and I see only an occasional fine bubble in the fuel flow at idle. Fix of a Yamaha no start, hard start, caused by bad fuel connector and bad hose. ), gained a great boat dog, had a bunch of wonderful times and some adventures . If air gets into the fuel system then the lift pump is pumping fuel and air to the VST. and then come right back . Participant. About the “automotive” fuel line (hose). Check the condition of all the fuel lines, and the connections between rubber flexis and solid lines. If that doesn’t do it off to the mechanic it goes. with a bad old hose from the 80s. Thanks for a great subject – too bad the “Narscisist -in chief’s EPS nincompoops ” pushed this garbage on us. It put me on the right track and I believe I’ve solved my problem. I have put sea foam treatment in the tank hoping it will do something for it. Nice thread, thanks! A leaky fuel line will produce either drips, or in more serious cases puddles of fuel underneath the vehicle. thank you! You can keep it closed with either zip ties or electrical tape. I was curious about what had happened – both basic curiosity and wanting not to have continued problems. Thanks. The pickup on the tank is clear also. Auto-parts or “small engine” (lawnmower) shops here charge $2.00—$2.50 a foot for 1/4″ or 5/16″ ethanol-resistant line, and I don’t think it’s u.v. We’ve had problems with two hoses in the past three years. Most owner’s manuals will tell you the size fuel hose they recommend for your engine. In order to run properly, diesels need huge amounts of ambient Your outboard may be stalling & running out of fuel due to three issues. We’re going to see more and more fuel related problems with our outboards. 1. needle and seat are worn out 2. needle and seat are obstructed with foreign material 3. carb float becomes saturated with fuel or is cracked and fills up with fuel 4. I think it very likely could have been the problem. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, Chilton's or other mechanical manual for your year, make and model of car. Phase separation leaves globs of ethanol in the fuel that the engine cannot run on. Any suggestions. I’VE STARTED CRUISING AND I’M FRUSTRATED AND OVERWHELMED, living on a boat • cooking & food • gear Check if your Outboard runs better. If you see any leaks or there are worn or damaged fuel pipes, you should replace them immediately. Big Sky Country Helena, MT (Adel, IA home) Posts: 1,160. Does not appear that the filter housing prime the filter hard while it is filtering out mounting screws with tubing... 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