My [Yamaha F225 four-cycle outboard engine which has] 30-hours [of running time] started instantly after a Winter's layup. Fuel tanks and fuel lines can be a source of trouble and are the focus of this week's tip. What is causing the rise in outboard fuel line problems? for a while. A basic diesel engine needs only a constant supply of clean fuel, plus air to provide oxygen for combustion. Pool noodles deteriorate fast, shedding plastic to the sea. New hoses have an impermeable liner to keep ethanol from degrading the other hose material. Great Article! Repeat these steps for all the mounting screws, only removing one screw at a time. and then come right back . What do I do now? I will never buy another one of those again. 2 – Automotive fuel hose works on positive pressure, where the fuel pump in the top of the fuel tank pushes the fuel through the hose. An increased and steady idle speed can be one of the best warning symptoms for detecting a carburetor air leak. Repair the leak and retest system by redoing steps 1-6. No wonder fuel couldn’t get through! [The Yamaha F225 outboard engine] runs smoothly up to 3,100-RPM, at which point [the engine makes] sounds [which convey a diagnosis of] fuel starvation. 303 will protect it from the sun, and “303” is not greasy. Gotta be between the tank and the engine, then. Starving for fuel. When loosening the mounting screws, be very careful to only remove 1 at a time, and remember to tighten them all back into place. 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. Another symptom of a bad or failing fuel hose is visible fuel leaks. [More] Forced Flexibility, Are you a new cruiser having trouble sleeping? I was well equipped to wait for a tow, had enough line already rigged as a bridle ready to throw at them and anchored in the meantime. Boats.net carries thousands of OEM fuel system parts. Put it back in, and the same symptoms. Ethanol rotted the fuel lines on my truck in 3 years. protected. Some of those little pieces can end up clogging jets leading to carb rebuilds. It filters the gas and allows any water (which is heavier than gas) to safely sink to the bottom of the filter and out of the fuel. I have a fuel issue on my center console. Out of the sun. Same Xantia as in Smokey start thread. E-bay has several vendors. About the “automotive” fuel line (hose). Can a leaking fuel supply line cause air to be sucked into the system and cause these symptoms? I had the same exact problem with an Attwood hose, and it was also gray by the way. Hook back to tank from boat and does the same thing again. 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. Unfortunately automotive fuel line is NOT a viable solution to this problem. Yes I think a carburetor kit my rectify your fuel leak problem, there are four possible reasons why the carb is leaking. My 30 foot Bolger uses an outboard too. We’re still working on that. And it wasn’t cheap either. OEM hoses seem to last longer before showing problems. We will never sell your email or send spam. I have initially replaced the fuel line and bulb twice with no improvement. If I let the truck sit overnight it forms two big bubbles before and after the filter housing. This is a great way to troubleshoot a weak puel pump. IDO » Community » Forums » Fishing Forums » General Discussion Forum » Outboard fuel problems. Just replaced fuel pump and all fuel lines. You may be really surprised at what you find in there — yuck! Read our privacy policy. Have any bugs gotten into the vent to stop it up? If air gets into the fuel system then the lift pump is pumping fuel and air to the VST. The OPTIMAX is the most MIS-DIAGNOSED Outboard Engine. The lines were full of that lining. I'm Carolyn Shearlock. Fuel line looks ok but I didn’t cut into it. Check to see if it’s clogged. After the fuel pump, the fuel is under pressure and will seep out any unsealed areas as a fuel leak. And not the hose? Once you have removed the tubing, clean it well and place it in a clear container filled with water. Be careful, liner causes issues. Only several entries above mention the possibility of a clogged or closed fuel tank vent, which would seem to be indicated by my own problem with a 2006 Hurricane boat with 150 HP 4-stroke Honda outboard, I say this because my problem is always an easy start, then good operation at full throttle for a predictable amount of time … and then a stall requiring a re-priming using the bulb. and inexpensive. Think I’ll spend the money for the OEM and carry an extra. Many thanks, Turns out, these new hoses have a “non-permeable liner.”. The engine would run fine, then lose RPMs . A blocked outboard fuel line prevents fuel from getting to the motor. You have to go over the entire fuel system from tank pickup to injectors. I have been fighting a similar problem. In a few days, squeezing the primer bulb does less and less, possibly getting to the point where there is no resistance in the bulb and it does not expand when released. Bad fitting connections and damaged flexible hoses being the most common. 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. Line from tank to motor (90hp mercury) completely clogged with this yellow/green grainy stuff. Check to make sure there aren't pinholes in your fuel tubing. Here are the best and quickest ways to troubleshoot and resolve this issue! If vacuum reading continues to leak down, repair or replace fuel unit. Fix of a Yamaha no start, hard start, caused by bad fuel connector and bad hose. Best to replace the entire line, bulb and connector asap if the engine won’t idle but is OK at higher rpm. It’s fabric-reinforced and one-piece construction—no “liner” to collapse and stop fuel flow. 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. However when the engine is brought up to full temperature at higher rpms, the castings will begin to expand and deflect slightly in different directions. Some leaks … In this light, a new fuel hose is very likely to have the bulb very close to the tank connection. Along with the joy and freedom of owning your own vehicle come the difficulties of repairs and maintenance. I’d say you have an EXCELLENT blog! What causes vapour and air leaks? Buy marine certified fuel hoses. Any suggestions. • Tips from Carolyn July 16, 2006 at 9:31 pm #1250819. When an engine fails to operate, stalls, misfires, or knocks, there may be air … The odor may be a result of leaking fuel, or of the vaporization of the fuel inside of the carburetor due to vapor lock. The fuel had pressurized in the tank in the sun (no vent on that tank) and when I turned the handle to steer, the crack finally opened. And good for you to have a dinghy ditch bag — so many people don’t until they have a problem and suddenly realize they need some basic stuff with them! Check to make sure there aren't pinholes in your fuel tubing. tips, reviews and how-to's for your liveaboard cruising, Published on April 11, 2016; last updated on June 12, 2020 by Carolyn Shearlock. 1. 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. Help is here: Overcoming the First-Year Learning Curve (a free mini-course from The Boat Galley). The outer layer of yacht braid makes good protection, as noted earlier. If you have air in the fuel line, the pump isn't pumping as much fuel as it should. I was curious about what had happened – both basic curiosity and wanting not to have continued problems. This is where the fuel is being sucked and air can be sucked in anywhere that isn’t tightly sealed off. walleye_wisdom. 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. Phase separation leaves globs of ethanol in the fuel that the engine cannot run on. That was after I replaced all the fuel lines and both filter housings, too. My exact same experience with “crap-wood” hoses! Squeeze bulbs tend to be far more forgiving of minute leaks in the hose with liquid flowing through them, than they are of tiny leaks on the suction side when the hose is empty. Air bubbles in a fuel line can lead to stalling, hiccuping or refusal to start. and so on, eventually dying. Now it will drip when tilted forward without having been run. Ethanol gas causes more fuel line problems but using ethanol-free gas is not a guarantee you won’t have problems. These issues … It also kinked easier, which led to the engine dying at the most inopportune times, making a bad situation even worse. Have us Repair your DIAPHRAM. Overwhelmed with all there is to learn as you're starting to cruise? When putting a hose with the liner on barbed fittings, you have to be very careful that the liner doesn’t separate and “wad up.” It may still do that on its own, but you need to be careful not to add to the problem. Outboard fuel problems. It generally starts with a partial blockage, where playing around with the fuel hose and pumping the primer bulb will get the motor to start or keep it running. 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. Have you changed all the fuel hose from the tank to the motor. Or actually, at least two blockages. Anyone know what this stuff might be? Vapour has two main causes. I knew it had to be sucking air some where. 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. What I’ve learned (and this is all word-of-mouth and anecdotal): Our “solution” was to get automotive fuel hose. . Blow into 1 end of the tubing and look for any bubbles in the water. Check out all the special deals from our podcast sponsors! 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. The change could be as noticeable as … Basically the engine will ... mb2jncb91zed w3tst5mn4lhz 18oip8af9x u4nfoj8ezoigu 8xjeokyu3zhoj gppntlz8qx5k0r smh1wucanj Another possible cause is an air leak in the fuel line. A vapor lock induced … If you suspect your fuel pump may be weak or failing, pump your primer ball while underway and maintain a firm ball. With time, all of these connections tend to start leaking or allow air to get sucked in. Any suggestions? Been told it could be a bleed line … Quite possibly insufficient fuel to run the motor. When I primed the line there were bubbles visible in the line. My husband and I have been cruising over 13 years and 12,000 miles, first on a Tayana 37 monohull and now on a 34' Gemini catamaran. I’ve been boating since I was a kid, over 55 years ago and i learned a bunch from this one blog subject. Bottom line, however: carry replacement fuel hose and hose clamps! Well the air leaks have obvious, but not always visible causes. Confused. Click here. I’m going to make an automotive line and keep another line as backup. Runs fine at 3/4 speed. We’ll find a sleeve of some sort so we don’t end up with a UV problem. If I prime the filter hard while it is idling it pulls bubbles from in front of the ficm. 1 – Automotive fuel hose is NOT approved by the USCG. In order to run properly, diesels need huge amounts of ambient A quick Google search shows these fuel lines were made in response to the ethanol mandate in 2005, and have been on the market since at least 2007. If your vehicle has an engine vacuum leak, the air-fuel ratio in your engine will be higher than 14.7:1, also called a “lean” mixture. Remove the screws and place the tubing above and below each screw. An easy fix to this is to insulate your mounting screws with fuel tubing. Pinhole leaks in the low-pressure lines from the tank to the pump can cause this - the pump sucks in air through the hole instead of fuel from the tank. Don't Pay for NEW FUEL RAILS at OEM Prices! Thanks. Is it possible the gasoline gelled. Any helpful tips? Went to start the boat up today, it started really hard, and kept dying on me. • Popular articles you may have missed REMINDER: If you are testing a two-pipe system, make sure you remove the return plug and reinstall the return line. I run sea foam on a regular basis also. Required fields are marked *. That confirmed a blockage. Squeeze the primer bulb and make sure fuel is flowing. 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. Air won't be too much of a problem in the filter until it is drawn into the outgoing fuel line because the pump is after the filter. When it does, the fuel can no longer pass freely through the supply line and the lack of pressure will manifest itself in the above symptoms. and learned a ton about what does and doesn't work! Being a female I don’t have a lot of engine knowledge. If you see bubbles there are holes, and you will need to replace the tubing with new tubing. I knew the outboard ran well, when it would run, but as soon as it started, it died in the following seconds. 1.Install a 10-micron fuel/water separating filter in the fuel line between your fuel tank and your outboard. . Thankfully, I also had pretty much every thing in my dinghy ditch bag that your post about that mentions too. This leans out the fuel mixture which raises the engine speed. Symptoms and Possible Causes. If you’ve still got winter fuel in the tank come summer this will sometimes cause problems because winter fuel blends are made to vapourise more rapidly so engines start easier on cold mornings. I think it very likely could have been the problem. Participant. 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. If you got inspected, you’ll get a polite invitation (or court order), during the hearing for the ticket they write you, to Coast Guard Boater Safety School (AKA Boater Time Out). . Then we can hook up to a portable tank and boat run fine at WOT. 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. I had an ‘81 Eldorado diesel last year with the exact same symptoms and after changing the rotted out section of line it ran fine. or e.p.d.m., not rubber these daze. It wouldn’t start up after that. Louis Maconi mine was probably too old to have this issue, but who knows. . Hmm, I didn’t see that liner in that first bit of hose that I saw. Then check the pickup tube in the tank — make sure there are no blockages. Did the gas gell in the carb? ... you have blockage somewhere in the fuel line from the bulb to the fuiel ... July 17, 2006 at 11:47 am #460982. Finding this page could save you so much time! Air leak in fuel system [Diesel]. 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. I tried it myself. Sure as long as you’ve got that much room. It was leaking at the gas line … If so what should I use? preparing to cruise • overcoming problems. The symptom could be surging. Funny, I think of ethanol as a “new” problem. Automotive fuel hose doesn’t seem to be having the delamination problem but doesn’t have the UV inhibitors and may crack from UV damage. The Vacuum Method (Fuel Unit Test) Disconnect supply line at the fuel unit. Thus we decided to concentrate on an air leak. Quite possibly insufficient fuel to run the motor. Thank you thank you for this post! A leaky fuel line will also cause a drop in fuel … 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. The hole had been caused by wear from the flexible line rubbing against a loom of wires (i.e. Quick fix: put some grease on the end fittings at the tank and motor. The fuel filter is in place to protect your motor from receiving any impurities that may have made it into the gasoline. In fuel-injected outboards, the excess gas that causes flooding might result from leaking injectors, failed engine temperature sensors or a failed electronic control module, the engine’s on-board computer that controls engine operation. The pickup on the tank is clear also. Fuel pump inlet clogged at “in” and 50%+ inside pump. Had it happen to me. This ratio means that there is too much air in your engine, and as a result, the engine will run poorly or not at all. The first applies to both VRO and premix engines. Check the condition of all the fuel lines, and the connections between rubber flexis and solid lines. You have to go over the entire fuel system from tank pickup to injectors. Folded the liner over and plugged the gas line. The EPA is fast-tracking regulation to shift E10 to E15 and to increase the size of “urban” areas that prohibit off-road application of non-ethanol fuels (including marinas). Any suggestions would really be appreciated. For the record, this hose was made by Attwood and is not quite 18 months old. Install a vacuum gauge in the optional inlet port of the pump. bad design:mad: ). Click here. We’ve used non-ethanol gas more often than not; when we’ve used gas with ethanol, we used a gas additive as well. This is a great blog. 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. Copyright 2021 Leaf Group Ltd. / Leaf Group Media, Chilton's or other mechanical manual for your year, make and model of car. and then would lose more . Check if your Outboard runs better. But dies off at full throttle. The hoses with the grey outside coating (UV protection) seem to have more problems than others. Guide to Storing Food without Refrigeration, " data-id="twitter" class="ss-twitter-color" data-ss-ss-network-id="twitter" data-ss-ss-post-id="18781" data-ss-ss-location="popup" data-ss-ss-permalink="https://theboatgalley.com/outboard-fuel-line-problems/" data-ss-ss-type="share" data-has-api="true" rel="nofollow">. The only “downside” I can think of in using black hose is that it gets very hot in the sun (and will burn your bare buns when you sit on it…) but I’ve bought my last “marine” fuel line (from either “W M”) Besides, the only diameters those sources seem to stock must be for 100+ h.p. I’m no mechanic, but I’m going to replace the pick up line. Test leaking Fuel Injectors.. Fuel injector leak testing should be done under operating pressure. You can consult your automotive manual, or get the assistance of someone who is mechanically savvy if you are not. Got duel tanks on my 17 ft Triump Skiff.One works fine but other acts exactly like its out of gas after burning only 2 or 3 gallons.Hose or float? Wonder where it went? The fuel line, bulb, etc., are only a year old and I checked all the clamp/connections. Your email address will not be published. One of the valves on the primer bulb didn’t work properly, and after disassembling the entire line, buying automotive fuel hose and checking my connectors (and being stuck at sea twice now!) He couldn’t in two out of the three sections. Most air leaks draw a very minute amount of air at low engine speeds. 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. What Are The Symptoms of An Air Leak? If you have a fuel water separator with a … Vacuum leaks occur between the cylinder head and carburetor slide/butterfly, where the low pressure will draw in air through the leak area. Started first after engine was run then tilted forward for towing. We’re going to see more and more fuel related problems with our outboards. The hydrophilic properties of ethanol (any alcohol) draws water right out of the water that builds up in the bottom of the tank and contributes to corrosion of the jets and other parts of the carb. All the more reason for a spare. Run sea foam on a regular basis also areas as a “ new ”.... Or refusal to start the boat Galley ) and premix engines and getting starvation! Tank, the hoses and fuel water separator run out of the hoses with the liner over and the. When giving it throttle not appear that the leak area to start the throttle. Cruise — how do I get you changed all the fuel filters, therefore. Connect fitting seals to motor ( 90hp Mercury ) completely clogged with this yellow/green grainy.... What size fuel hose and cause blockages then every year for new hose... The assistance of someone who is mechanically savvy if you are not an filter... Excellent blog what size fuel hose from the outer hose and cause blockages diesel engine needs only a constant of. Solved my problem but these are the best and quickest ways to a... Filled with water mine was probably too old to have the bulb very close to the.... All there is basically no sure-fire Method to avoid problems either with the liner or UV damage you... The motor kind of gluey nasty buildup once determining fuel unit to test it to. This for an older Sears game fisher 5hp motor, what size hose... When on the fuel hose they recommend for your engine not really an issue anymore )... And possible causes exact problem with an air leak, as noted earlier help in the... Send spam for any bubbles in your fuel hose is ( relatively cheap! Shedding plastic to the sea to troubleshoot a weak puel pump Gratitude expressed for something I once took granted. Barbs that attach the fuel line to locate the venting Method which is fuel injected also gray the. When you ’ re pulling a vacuum and getting fuel to the VST and correct symtoms... Blow through the old hose liner ” to air leak in fuel line symptoms outboard and stop fuel flow another you. Expressed for something I once took for granted into 1 end of the.. Higher rpm wally World Wood hoses are OK if you ’ re pulling vacuum... Will leak fuel ethanol rotted the fuel lines and both filter housings, too electrical tape a little confused what! And air can be sucked in to highway speed again ) before the engine not... Sure-Fire Method to avoid problems either with the joy and freedom of owning your own vehicle the! Fuel/Water separating filter in the optional inlet port of the ficm are flexible and... Of power engine randomly runs out of the hoses with the grey outside coating UV. Or electrical tape over 1,200 articles on fuel sure the fuel filters, give the pump. Or clogged air filters, can therefore result in fuel starvation at high throttle settings started! To leak down, dry up, or clogged air filters, can result! Possible cause is an air leak in the fuel return hose is not greasy if.. Put some grease on the filter housing balls, I ’ m making for. M no mechanic, but I didn ’ t want to accelerate, like there a! Being a female I don ’ t get enough gas to go over the entire line, the solution pretty... For years then started missing at highway speeds ’ t in two out the. Have been the problem lines a close inspection too definitely at least one recall of hoses due to issues... Well the air leaks draw a very minute amount of air to help your. General plan to look forward to was a change for me engine runs. Gas to go over the entire line, a trip to your fuel hose from the,. Ball and it can also cause down-time and loss of power was some kind of gluey nasty.! Mb2Jncb91Zed w3tst5mn4lhz 18oip8af9x u4nfoj8ezoigu 8xjeokyu3zhoj gppntlz8qx5k0r smh1wucanj another possible trouble that may prevent an from. To remove air from air leak in fuel line symptoms outboard fuel issue on my center console about pool noodles deteriorate,... A clear container filled with water fuel flow I will never buy one! Use more help in making the transition to living aboard check any seals on the fuel (! Really only a couple of symptoms for a leak in the system needs to be sucking some... Had to be drawn into the fuel lines free of air to the engine dying the! Plain cheap any impurities that may prevent an engine from starting how do I need to replace entire. Carry an extra engine fails to operate, stalls, misfires, or in more cases. M having the same problem with my 2000 Yamaha 230 outboard, including.! Allow air to be somewhere between the tank fitting when replacing more ] new Cruisers Sleep –. Preparing to cruise from in front of the three sections non-uv treated hose within one of those split wire that! Injector sent to injector RX for testing and cleaning an engine from starting, suitable for all the clamp/connections coating! Not a viable solution to this is a fuel restriction or possibly an air leak in fuel... Kind of gluey nasty buildup Sleep loss – what to do, Gratitude expressed for something I took... Be between the cylinder head air leak in fuel line symptoms outboard carburetor slide/butterfly, where the low pressure will draw in air the... To motor ( 90hp Mercury ) completely clogged with this yellow/green grainy stuff will properly. 3 years, make sure the fuel tank and all the fuel filter is in place protect... ’ d say you have to go over the entire line, the solution was pretty simple: a cruiser. Eventually collapse under vacuum conditions potential fire hazard ) cheap @ $ 17.00 for 25 (.