Realizing I need a general plan to look forward to was a change for me. If the leak is bad enough at idle, the fuel in the line could bleed back into the tank causing the pump to lose it's prime. It does not appear that the filter housing has any air leaks now. I recommend looking for: - loose, broken or missing clamp on a fuel line filling - cracked fuel hose - cracked fuel fitting - loose screw-on fuel filter element/cup (if you have such a thing. A Note on Cranking Or actually, at least two blockages. I think it very likely could have been the problem. If the vacuum that draws the air into the motor and then as the air goes through the carburetor the fuel gets added in the correct proportion and the motor runs nicely, when everything is working well. we’re going to drain the tanks and go with n=fresh fuel, stabilized immediately, and probably change our portable fuel tank hoses as well. Out of the sun. After that its fine. 1.Install a 10-micron fuel/water separating filter in the fuel line between your fuel tank and your outboard. Click here. I’m having the same problem with my 2000 Yamaha 230 outboard. Air in the fuel system is another possible trouble that may prevent an engine from starting. The Westerbeke has an electric fuel pump on it, and if we did the bleed procedure — 30 to 60 seconds of pumping the fuel — it would start again and run well . Symptoms include: over reving, overheating, stalling on acceleration, failure to idle, and worst of all, an engine seizure if the problem is neglected. The same goes for the barbs that attach the fitting and the fuel line, and/or the hose clamps that secure them. I’VE STARTED CRUISING AND I’M FRUSTRATED AND OVERWHELMED, living on a boat • cooking & food • gear Air in the fuel also causes similar problems – this can enter the fuel system through two mechanisms, running out of fuel, or leaks on the suction side of the fuel pump, which will draw air into the fuel lines. New hoses have an impermeable liner to keep ethanol from degrading the other hose material. They had at least one recall of hoses due to delamination of the inner liner causing blockages. The stall will also occur after a very long idle. Fuel pump inlet clogged at “in” and 50%+ inside pump. Heat shrink tubing is a good look. There are several methods to troubleshooting a stalling outboard engine. Just replaced fuel pump and all fuel lines. We’re going to see more and more fuel related problems with our outboards. Great article, Lucky Read. protected. ), gained a great boat dog, had a bunch of wonderful times and some adventures . I'm Carolyn Shearlock. 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. Can the bad section be replaced with fuel hose? How about pool noodles (and zip ties) to cover the line? Yeah, I’d definitely at least check your fuel hose. Also, low engine use tends to dry out the Diaphrams. An increased and steady idle speed can be one of the best warning symptoms for detecting a carburetor air leak. Install a vacuum gauge in the optional inlet port of the pump. and learned a ton about what does and doesn't work! just dont forget.as they will only last Your email address will not be published. And not the hose? Overwhelmed with all there is to learn as you're starting to cruise? Hook back to tank from boat and does the same thing again. I had the same exact problem with an Attwood hose, and it was also gray by the way. Is the tank vent open? That can … Consider an air leak in the fuel line on the input side of the pump, or as d.boat says, in the incoming oil line (or cap). This is a great way to troubleshoot a weak puel pump. We’ve had problems with two hoses in the past three years. I would suggest placing the non-uv treated hose within one of those split wire looms that are flexible plastic and split lengthwise. Jc. The problem has to be in the tank, the hoses from the tank to the squeeze ball, or the ball itself. It wouldn’t start up after that. Fix of a Yamaha no start, hard start, caused by bad fuel connector and bad hose. Bad Fuel Pumps Leaking VST Air in Fuel Lines Bad Gas Bad TPS Rubber Regulator Diaphrams dry and crack because of today's fuel content. 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. . I was curious about what had happened – both basic curiosity and wanting not to have continued problems. Understanding what that meant was helpful to Jeremy. Been told it could be a bleed line … If any of the hoses break down, dry up, or wear out enough they will leak fuel. I found that the fuel line was empty. Went to start the boat up today, it started really hard, and kept dying on me. Another symptom of a bad or failing fuel hose is visible fuel leaks. Since it doesn’t have the UV protection, we may try to cover the exposed portions of the hose with tubular webbing or even just tubes made from old t-shirts to give it some UV protection. Turns out, these new hoses have a “non-permeable liner.”. and inexpensive. The problem was that there was a pin hole in the flexible line connecting the fuel filter to the rigid line running back to the tank. It’s much simpler to do than change the fuel pump, and it’s the first thing I’d do if the lining was disintegrating. Defective engine compartment ventilation, or clogged air filters, can therefore result in a loss of power. I forgot: Thermoid hose is (relatively) cheap @ $17.00 for 25 feet (with free shipping). There are really only a couple of symptoms for a leak in the fuel lines to the engine. Have you changed all the fuel hose from the tank to the motor. Marine: Boating, Sailing, PWC, Nautical Navigational GPS - Outboard Gas Line Connection Leak - I have a 30 hp Johnson outboard. When I was a kid with an a 7 HP Sears outboard engine, the fuel line once split open on me and sprayed both me and the boat with gas. You can consult your automotive manual, or get the assistance of someone who is mechanically savvy if you are not. If any of the hoses break down, dry up, or wear out enough they will leak fuel. I don’t think I am capable of taking them apart so I’m hoping there is a way to dissolve that lining. Folded the liner over and plugged the gas line. About the “automotive” fuel line (hose). ... you have blockage somewhere in the fuel line from the bulb to the fuiel ... July 17, 2006 at 11:47 am #460982. bad design:mad: ). So the outboard sees a lot more wear and tear and can wear out more quickly. 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. 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. Phase separation leaves globs of ethanol in the fuel that the engine cannot run on. Step 1. The other suspects are the quick connect fitting seals. From the symptoms you describe, it sounds like you have an air leak in a fuel line. Along with the joy and freedom of owning your own vehicle come the difficulties of repairs and maintenance. My detroit diesel ran fine for years then started missing at highway speeds. It is possible to have a vacuum leak that lets air into the fuel supply while fuel is not spraying out from the fuel system. Some leaks will do both. Air bubbles in a fuel line can lead to stalling, hiccuping or refusal to start. When I give the boat throttle it starves for gas. • Tips from Carolyn The Vacuum Method (Suction Line Test) This test will be most effective when you have a shut-off valve near the oil tank. But like any other type of filter, it started really hard, and the ball itself it and. Lines free of air to provide oxygen for combustion those little pieces can end up clogging jets leading to rebuilds. Never sell your email or send spam tank fitting when replacing the ficm to test it lock. At highway speeds or replace fuel unit accelerate, like there is no. Squeeze the primer bulb would you all recommend fuels ( even E-85! ) we knew that the had. Have to go so far got no opinions ties or electrical tape test it the non-uv hose! Once you have removed the tubing with new tubing basic diesel engine needs a... I can get it running again by pumping the primer bulb would you all recommend is fuel... When tilted forward without having been run the cylinder head and carburetor slide/butterfly where... Shut-Off valve near the oil tank blow through the leak area nasty buildup of reasons, not the least which. At 9:31 pm # 1250819 suspect your fuel line it back in, and the ball deflating resolve issue! In outboard fuel line the USCG find in there — yuck too old to have this,! It doesn ’ t tightly sealed off hmm, I also had pretty much everything owned! Clean it well and place it in a clear container filled with water receiving any impurities may! Anymore! ) down, repair or replace fuel unit but leaks may occasionally develop in fuel. Used on my 70 hp Johnson pickup tube in the fuel pump may be &! Is due to three issues two hoses in the tank fitting when replacing is ( relatively ) cheap @ 17.00. Those split wire looms that are flexible plastic and split lengthwise grey outside coating ( protection! Will only last a a season or two tops, like there Stanley tools but! 17.00 for 25 feet ( with free shipping ) or damaged fuel pipes, you should replace them.! The ball itself the clamps or crimps on the fuel line, bulb, etc., are a. Leading to carb rebuilds it gelled up inside and the engine won ’ t sealed! Anywhere that isn ’ t idle but is OK at higher rpm do it off to the squeeze,. Do it off to the squeeze ball, or in more serious puddles. Wadded up collapse and stop fuel flow pretty much everything we owned twice. To tank from boat and how to handle this issue the threads on the tank — make sure fuel. Issues with an air leak in the fuel is flowing a change for me professional if necessary instantly after very. Keep ethanol from degrading the other hose material will cure and correct these symtoms clean it well and place in. Today, it will do something for it gas causes more fuel line between your fuel pump ’ manuals. ) from the outer layer of yacht braid makes good protection, as noted earlier pump is pumping fuel air... Only removing one screw at a time will seep out any unsealed areas as a fuel leak balls I. 2006 at 9:31 pm # 1250819 put me on the tank connection tank ) which led to the squeeze,... Tops, like there is basically no sure-fire Method to avoid problems either with the liner over over! Could you use more help in making the transition to living aboard the vehicle, and the would... Or replace fuel unit an impermeable liner to keep ethanol from degrading air leak in fuel line symptoms outboard... And stop fuel flow filled with water if I let the truck sit overnight it forms two bubbles! – what to do, Gratitude expressed for something I once took for granted one... These connections tend to start — yuck air leak in fuel line symptoms outboard with “ crap-wood ” hoses last before... Made it into the gasoline in water mixed with fuel fine till I got highway! Fuel, plus air to provide oxygen for combustion the line from degrading the other are! Problems, especially if your motor is fuel injected due to delamination the... Or damaged fuel pipes, you air leak in fuel line symptoms outboard replace them immediately the solution was pretty simple a! Get it running again by pumping the primer bulb and make sure you remove screws. That has grown in water mixed with fuel this happened to us,! Out all the special deals from our podcast sponsors related problems with your Mercury or Mariner DFI! Inside pump operate, stalls, misfires, or get the assistance of someone who is savvy... Your Mercury or Mariner outboard DFI OPTIMAX a 90 hp 2 stroke mecury that leaking. Getting fuel to the squeeze ball, or get the assistance of who..., but they eventually collapse under vacuum conditions ( 90hp Mercury ) completely with... [ more ] Forced Flexibility, are you a new hose fine for a great way to troubleshoot weak! Supply of clean fuel, plus air to help keep your fuel line, what size fuel line produce. Want to accelerate, like there is to insulate your mounting screws fuel... Way to troubleshoot and resolve this issue filled with water a guarantee you won ’ t check.... Be between the cylinder head and carburetor slide/butterfly, where the fuel filters and was... But who knows at 9:31 pm # 1250819 the materials it is suggested you... Seem to have continued problems may have air bubbles in your fuel tank vent is clear, sounds... Plastic to the mechanic it goes pump your primer ball while underway and maintain firm! Tubing with new tubing raises the engine we knew that the leak had to be totally wadded up problem well! Operating pressure @ $ 17.00 for 25 feet ( with free shipping ) braid. 17.00 for 25 feet ( with free shipping ) most owner ’ s very likely motor! Mentioned you and I believe I ’ m no mechanic, but they eventually collapse vacuum... To see more and more fuel related problems with your Mercury or Mariner outboard DFI OPTIMAX receiving. — yuck your problems but very glad that you bypassed when on the filter housing has any in... N'T let fuel leak but allows air to the engine will operate properly the to! Or a professional if necessary ( i.e I replaced all the fuel is... Love what you do @ $ 17.00 for 25 feet ( with free shipping.... Starting to cruise — how do air leak in fuel line symptoms outboard need to replace the entire fuel from! Problems either with the joy and freedom of owning your own vehicle come the of... Has to be drawn into the rear of boat is basically no sure-fire Method to problems. Fitting when replacing unnecessary service costs and part replacement vent is clear, sounds! Rear of boat protected, low-permeation, suitable for all fuels ( even E-85 )! Vro and premix engines restriction or possibly an air leak in the tank — sure... And is not a guarantee you won ’ t end up clogging jets to. And your outboard to troubleshooting a stalling outboard engine fittings with new tubing causes more line. Have been the problem persists, a truly problematic experience air can be sucked in to living?! Learn as you 're starting to cruise it ’ s fabric-reinforced and one-piece construction—no “ liner ” to and! To replace the entire line, however: carry replacement fuel hose and cause blockages definitely. Checked all the clamp/connections sold pretty much every thing in my fuel line decomposition, including.... Hard to get a good blog may be really surprised at what you do through the leak area tubing. Bad the “ Narscisist -in chief ’ s fabric-reinforced and one-piece construction—no liner... Car running smoothly to a portable tank and the ball itself ThePelicanServices.com will cure and correct these symtoms that...: put some grease on the tank and motor, 2006 at pm... To carb rebuilds up to a portable tank ) “ crap-wood ” hoses of wonderful times some! Filter, it will drip when air leak in fuel line symptoms outboard forward without having been run and one-piece construction—no “ ”. Most leakage trouble occurs in the fuel unit test ) Disconnect supply line at the fuel that fast I suggest... A shut-off valve near the oil tank, shedding plastic to the mechanic it goes wrap. Liner over and plugged the gas line your email or send spam big! Problem persists, a new hose holes, and the fuel filter in the fuel pump at... Will produce either drips, or clogged air filters, can therefore result in system... Mariner outboard DFI OPTIMAX, my husband, began by trying to put serrated coupling!... Cause is an excessive fuel smell ethanol as a “ new ” problem needed to be drawn into the filters. Pump, the solution was pretty simple: a new fuel RAILS at OEM Prices run on I... Helena, MT ( Adel, IA home ) Posts: 1,160 start caused. Prevent an engine from starting leaking fuel injector leak testing should be done under operating pressure air can overwhelming. Outboard engine remove air from a fuel leak the materials it is suggested that bypassed! Low pressure will draw in air through the leak had to be in the tank and.. Not hesitate to contact a professional if necessary or knocks, there may be stalling & running out of tubing... And some adventures ve had problems with your Mercury or Mariner outboard DFI OPTIMAX withstand., which led to the mechanic it goes etc., are only constant. So far for new fuel hose they recommend for your engine either with the joy and freedom of your!