Listen for unusually air sucking sounds as you squeeze. 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. These leaks must be eliminated immediately because of potential fire hazard. Thanks. If air gets into the fuel system then the lift pump is pumping fuel and air to the VST. Also, I’m making this for an older sears game fisher 5hp motor, what size fuel line should I get? and inexpensive. It’s fabric-reinforced and one-piece construction—no “liner” to collapse and stop fuel flow. 1. or e.p.d.m., not rubber these daze. How about pool noodles (and zip ties) to cover the line? E-bay has several vendors. The hoses with the grey outside coating (UV protection) seem to have more problems than others. Test leaking Fuel Injectors.. Fuel injector leak testing should be done under operating pressure. Confused. I’m having the same problem with my 2000 Yamaha 230 outboard. • Tips from Carolyn The average DIY fuel injector cleaning project and most automotive repair shops does not have the proper diagnostic equipment or the ability to test leaking injectors or clean them properly. When the symptoms appear I can get it running again by pumping the primer bulb. [More] Forced Flexibility, Are you a new cruiser having trouble sleeping? If any of my engines “drank” fuel that fast I would despair of the whole thing! Hook back to tank from boat and does the same thing again. Take my free mini-course: Filed Under: Boat Work Tagged With: Boat Maintenance, Boat Projects - Repairs & Upgrades, DIY Tips, Overcoming. Air leak in fuel system [Diesel]. I’VE STARTED CRUISING AND I’M FRUSTRATED AND OVERWHELMED, living on a boat • cooking & food • gear After turning the engine off … A Note on Cranking It wouldn’t start up after that. 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. Outboard engines lose fuel prime because of an air leak in the fuel system. for a while. If that doesn’t do it off to the mechanic it goes. I’m going to make an automotive line and keep another line as backup. Outboard fuel problems. A leaky fuel line will also cause a drop in fuel … 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. I’M PREPARING TO CRUISE — HOW DO I GET READY FOR THIS?? Thankfully, I also had pretty much every thing in my dinghy ditch bag that your post about that mentions too. Many thanks, The symptom is the same. Either type of hose can have a problem. Any air in the system needs to be vented (bled) before the engine will operate properly. Have any bugs gotten into the vent to stop it up? Some of those little pieces can end up clogging jets leading to carb rebuilds. I didn’t know what it was at the time I thought it was some kind of gluey nasty buildup. Nice thread, thanks! Now it will drip when tilted forward without having been run. What I’ve learned (and this is all word-of-mouth and anecdotal): Our “solution” was to get automotive fuel hose. I split the hose lengthwise: Hard to get a good photo, but basically the liner appeared to be totally wadded up. After that its fine. An easy fix to this is to insulate your mounting screws with fuel tubing. In this light, a new fuel hose is very likely to have the bulb very close to the tank connection. Xantia 1.9 TD 1995 92000m NB. com. engines (3/8″ to 1/2″) and don’t fit small outboard engine fittings. The other suspects are the quick connect fitting seals. I think it’s very likely that motor had one. Replaced with an overpriced Atwood “Kit” with no ends (how stupid is that) but problem solved, for now. - bad seal in a quick-connect fuel fitting Don't Pay for NEW FUEL RAILS at OEM Prices! I’d say you have an EXCELLENT blog! • Totally FREE – one email a week, I’M THINKING ABOUT LIVING ON A BOAT AND DON’T KNOW WHERE TO START. Here’s how to rest better. Check all fuel line connections and hose clamps. walleye_wisdom. If I let the truck sit overnight it forms two big bubbles before and after the filter housing. The stall will also occur after a very long idle. Marine: Boating, Sailing, PWC, Nautical Navigational GPS - Outboard Gas Line Connection Leak - I have a 30 hp Johnson outboard. Turns out, these new hoses have a “non-permeable liner.”. Would drip out of the bottom of cowling and into the rear of boat. ... test the line for leaks and be certain no restrictions exist. A blocked outboard fuel line prevents fuel from getting to the motor. Here are the best and quickest ways to troubleshoot and resolve this issue! There are really only a couple of symptoms for a leak in the fuel lines to the engine. The number one problem with squeeze … Best to replace the entire line, bulb and connector asap if the engine won’t idle but is OK at higher rpm. If you see bubbles there are holes, and you will need to replace the tubing with new tubing. 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 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. I think I will start my first thread. With time, all of these connections tend to start leaking or allow air to get sucked in. Could you use more help in making the transition to living aboard? These issues … The amount of air needed is easy to under estimate – around one cubic metre per minute is required for every 10hp of engine power. . Be careful, liner causes issues. So sorry to hear about your problems but very glad that you found it helpful! Again, consult your automotive manual or a professional if necessary. Remove the screws and place the tubing above and below each screw. I have put sea foam treatment in the tank hoping it will do something for it. Great article, Lucky Read. and then come right back . We explore the three big issues that can be causing the problem as well as why outboard run out of fuel. When I primed the line there were bubbles visible in the line. If you want to keep enjoying the delight of the open road, you'll need to know how to diagnose or fix a few things, or know a great mechanic. 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. For the record, this hose was made by Attwood and is not quite 18 months old. OEM hoses seem to last longer before showing problems. Most leakage trouble occurs in the fuel lines, but leaks may occasionally develop in the fuel tank. As fuel tanks age, the fuel pickup hose can crack and allow air to leak into the fuel line causing your Outboard to run poorly or even shut down unexpectedly. Install a vacuum gauge in the optional inlet port of the pump. and learned a ton about what does and doesn't work! Fix of a Yamaha no start, hard start, caused by bad fuel connector and bad hose. The pickup on the tank is clear also. I tried it myself. 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. They had at least one recall of hoses due to delamination of the inner liner causing blockages. Is there a fuel filter in there (that you bypassed when on the portable tank)? Automotive fuel hoses are made to withstand bursting from internal pressure, but they eventually collapse under vacuum conditions. I would suggest placing the non-uv treated hose within one of those split wire looms that are flexible plastic and split lengthwise. REMINDER: If you are testing a two-pipe system, make sure you remove the return plug and reinstall the return line. Big Sky Country Helena, MT (Adel, IA home) Posts: 1,160. Went to start the boat up today, it started really hard, and kept dying on me. The outer layer of yacht braid makes good protection, as noted earlier. 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. It is suggested that you have your leaking fuel injector sent to Injector RX for testing and cleaning. 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. I posted this on another thread, got no opinions. Runs fine at 3/4 speed. However, I did buy a new fuel pump kit and installed it on my Mercury 90 hp outboard yesterday since I didn’t really have the extra money to hire a mechanic. 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. Some leaks … That’s also a problem, but won’t produce the symptoms we had of an engine losing RPMs … The Vacuum Method (Fuel Unit Test) Disconnect supply line at the fuel unit. Folded the liner over and plugged the gas line. We’ve used non-ethanol gas more often than not; when we’ve used gas with ethanol, we used a gas additive as well. It was leaking at the gas line … Same Xantia as in Smokey start thread. We’re going to see more and more fuel related problems with our outboards. 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! . I have a 90 hp 2 stroke mecury that is leaking fuel and oil. Boats.net carries thousands of OEM fuel system parts. 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. Thank you thank you for this post! Periodically it doesn’t want to accelerate, like there is a fuel restriction or possibly an air leak in the line. Air can be sucked in past the the clamps or crimps on the fuel hoses. The liner caused issues when trying to put serrated coupling in! You can consult your automotive manual, or get the assistance of someone who is mechanically savvy if you are not. My detroit diesel ran fine for years then started missing at highway speeds. 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. An increased and steady idle speed can be one of the best warning symptoms for detecting a carburetor air leak. When this happened to us recently, the solution was pretty simple: a new hose. 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 . • Popular articles you may have missed 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). Somewhere between the engine and the fuel tank. Check to see if it’s clogged. thank you! I’ve been boating since I was a kid, over 55 years ago and i learned a bunch from this one blog subject. It also kinked easier, which led to the engine dying at the most inopportune times, making a bad situation even worse. Keep your fuel lines free of air to help keep your car running smoothly. 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. 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. Save yourselves the headache. Do I need to wrap the threads on the tank fitting when replacing? The Boat Galley can be overwhelming with over 1,200 articles. Can the bad section be replaced with fuel hose? As fuel tanks age, the fuel pickup hose can crack and allow air to leak into the fuel line causing your Outboard to run poorly or even shut down unexpectedly. Blow into 1 end of the tubing and look for any bubbles in the water. The hole had been caused by wear from the flexible line rubbing against a loom of wires (i.e. The symptom could be surging. 1 – Automotive fuel hose is NOT approved by the USCG. Quick fix: put some grease on the end fittings at the tank and motor. Air in the fuel system is another possible trouble that may prevent an engine from starting. 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. . Store your fuel line out of the sun. 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. 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). 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. Jc. Have a 40hp Johnson starts fine but bogs down when giving it throttle! 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. Step 3 Another reason you may have air bubbles in your fuel line is due to vibration. . Tighten the screws securely in place. Fuel leaks. Symptoms and Possible Causes. My dive team had been having issues with fuel starvation as well, and we’re wondering if it’s the fuel delamination/Phase separation thing as well. 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. The change could be as noticeable as … There is basically no sure-fire method to avoid problems either with the liner or UV damage. There are several methods to troubleshooting a stalling outboard engine. Thanks. I have a fuel issue on my center console. 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