So the procedure to adjust this has to begin without the engine running. When the outboard is running normally, the engine’s fuel pumps create a slight vacuum in the fuel hose. Any sort of fuel leaks should be addressed as soon as possible. And, fuel filters are cheap. Spark plugs. After all, they are part of the same system. Buy It Now. Usually a bad or failing fuel hose will produce a few symptoms that can alert the driver of a potential problem. Even when I backed of the 'good' engine to see if it was hogging the fuel- didn't make a difference. Fuel injectors are considered to be dirty when the hydrocarbons and additives which all forms part of today’s fuels, together with engine gunk and carbon, cause the injectors to become restricted. is either blockage (bad filter, kink, whatever), or your pump is shot. These older small fuel … Squeeze the primer bulb and make sure fuel is flowing. For example, the thermostat of an outboard that runs in salt water will experience far more corrosion than thermostats in outboards primarily used in fresh water, and will need replacing more frequently. Symptoms of a Bad Fuel Pump. Fuel odor. Top Rated Seller Top Rated Seller. However, most modern cars now have the filter integrated right inside the fuel tank somewhere near the port where fuel exits the tank and into the fuel line. Non return connection at tank. You don't always see fuel. This cover is a little bit wedged in there so I'm just going to take the pull start off to make them easier to get out. All in all, while driving if you experience revving or sputtering and delayed acceleration, this clearly point towards the water in gas symptoms. Using the vacuum pump apply a vacuum to the fuel line at the hose that is normally connected to the inlet of the fuel filter downstream from the lift pump. Fuel system problems The most likely problems to beset older two-stroke outboard engines are with the fuel system. Top Rated Seller Top Rated Seller. Is the fuel line in okay shape? Trending at C $21.01 Trending price is based on prices over last 90 days. Some of the major causes are condensation of atmospheric pressure, the poorly sealed cap on tank’s top, and the bad top fuel pump. Clearly the float is hanging up or the needle is jamming. The fuel filter, therefore, sits anywhere along your car’s fuel line between the fuel tank and your fuel injectors (or carburetor in older cars). I started seeing smoke from my mirrors in the other cars' headlights coming out the tailpipe even when I wasn't driving it hard. Having a faulty fuel pressure regulator can also show symptoms of a bad fuel filter. If not, you have a leak. Whining noise coming from the gas tank; This is one of the earliest signs of a bad fuel pump. Alejandro Uria is the co-founder of MarineCarburetors.com and I asked him if he could shed a little light on the most frequent carb problems. Hard starting is usually the symptom though. Before taking anything apart, check to see if your engines computer has any trouble codes saved in it. It wouldn’t start up after that. You should be able to take the fuel line off and then unscrew the barb from the tank fitting. May 25, 2014 – At one point it lets me rev the motor then a few seconds later it sputters again till it dies. A wet spark plug can indicate water in the fuel while a white residue on the plug can point to a plug that is too hot. This would be an indication that the fuel pump would be bad, if you can pump the bulb when the motor hesi-tates, & it will resume running until the carburetor goes dry again. Solving water in gas tank symptoms. 2 product ratings - Mercury Outboard 200 20hp Fuel line adapter check unit 22833. Looks white to me, but smells like fuel. Examine the fuel in a clear container. Listen for unusually air sucking sounds as you squeeze. [Unclear] wants me to take the boat out of the water, to their shop, to pump out the fuel (at a high price). There's six bolts here that hold this plate on and that's the plate that the reed valves attach to. Inspect the water-separating fuel filter on larger engines. A normal spark plug will appear dry with a grayish color. 1. Timing is on, but I am getting lots of smoke out the tailpipe. If water is found, pump the tank dry from the fuel line or siphon the tank dry. Check all fuel line connections and hose clamps. Baystealth 1888 with Yamaha F115 (4 stroke) 2002 15ft Alumacraft with 25 Yamaha 4 stroke FUEL LINE HOSE ENGINE CONNECTOR 22-13563Q3 OUTBOARDS MERCURY MARINER YAMAHA 3/8 . Bad Fuel pressure regulator also show similar symptoms. A fuel demand valve is a solution that was made by the industry to be able to combat the problems that the new outboard fuel tanks were having. Regardless of the type of fuel pump that your vehicle has, it will still manifest almost the same bad fuel pump symptoms. 2002 19ft. Bad fuels can come from water (condensation), debris (dirt or metal oxidation-rust), algae or varnish build-up as fuel ages. 12 Symptoms of a Clogged Fuel Filter (How to Tell if a Fuel Filter is Bad) Lower Engine Performance; Any weak fuel filter will cause the engine to misfire and perform very low. Fuel injector flow rates, atomization and distribution are affected and this can cause all sorts of drive-ability and performance problems. Keeping the filter clean goes a long way to keeping your engine running right. The [cause of the] problem [with poor running of the Mercury FOURTSTROKE 115-HP outboard engine] has been diagnosed as bad fuel. I setup the other feed to fuel both engines out of the water separator and increased to 3/8" ports for better flow. 11,803 Posts #4 • Aug 4, 2008. Once this happens, immediate cleaning will help, but the best will be a full replacement. Went to start the boat up today, it started really hard, and kept dying on me. (12) C $12.74. July 16, 2006 at 9:31 pm #1250819. Two carburetors one for each cylinder and then just a front face plate. The valve is actually in the barb that the fuel line attaches to on the tank. The first symptoms of a problem started on a recent, night road trip. Modern fuels have a shelf life of only a few months, especially when mixed with two-stroke oil, with the fuel leaving a black varnish or gum on the inside of the carburetor when it evaporates. 1. If it smells of gas it's bad. Low Pressure fuel pump diaphragm Set. There are physical signs that you can feel when your Mariner’s fuel filter is clogging. I would check the anti-siphon valve on the fuel tank. The first signs of contamination can be seen in your fuel filter. The outboard fuel pump has a sensitive diaphragm that receives a suction signal from a piston cylinder so the pump can deliver fuel. Atmospheric pressure in the tank through the vent pushes the fuel from the tank to the engine. If the fuel pump is bad, you can keep the motor running by squeezing the primer bulb in the fuel line. Hooked back up to spare- ran fine. If you’re at a 70 degrees spring day, not too hot out today and already in less than 30 minutes this tank has pressurized and really become quite rigid. Tested with another tank/fuel line/bulb – same symptoms. Outboard fuel problems. Here’s a look at the more common manifestations of an impending fuel pump failure. C $19.05. A clogged fuel line in the car is akin to clogged arteries. Signs of a Bad Fuel Filter: Mercury Mariner Typical Fuel Filter. See if the system will hold the vacuum. Over time fuel hoses can dry out, and begin to leak fuel vapors. It will either take your vehicle a few seconds to respond to the gas pedal before it accelerates, or it won’t accelerate at all.The faster you try to go, the more apparent this symptom will be. The fuel pressure regulator is responsible for maintaining the required pressure in the fuel rails. 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. Brand New. A fouled spark plug occurs when the plug isn’t burning fuel normally, leaving damage to the plug which can cause the engine not to start. fuel line with primer bulb. Do you have a fuel shut-off valve, and if so, is it open? Outboard motors archive 2000-2004; FUEL PUMP PROBLEM SYMPTOMS. Clamp off the fuel line just upstream from the primer ball. The 'good' engine still ran fine sharing the line and the 'bad' engine same problem. Big Sky Country Helena, MT (Adel, IA home) Posts: 1,160. Okay there we go. While some gas engines – inboards, outboards, generators being the most common on cruising boats – have direct fuel injection, most have a carburetor. As always, thanks for your ideas. A clogged fuel filter(s), bad fuel line, faulty lift pump, faulty high pressure pump, bad pump grommets in the VST (Vapor Separator Tank), bad air compressor, faulty pressure regulator, faulty fuel rails or rail fuel lines, a bad tracker valve, bad fuel injector or a bad air injector are just a few of the items which can cause improper pressures. Fuel line connectors in engine casing bypassed – line connected directly at low pressure fuel filter – same symptoms. Visible cracks along exterior of the hose. Your outboard’s owner's manual should tell you how often you should replace the thermostat(s). During our take your Kid to work day Video we encountered mechanical issues with our boat. Does this sound like a bad fuel pump? If you step on the gas pedal and do not accelerate right away, then you are experiencing hesitation from the engine.This hesitation could be the result of bad fuel in the internal combustion chamber. If the cylinder has a leak, the pump pulse signal will not be strong enough to send the proper amount of fuel to the cylinder. In this case, the check valves are both slightly open and allowing fuel flow at the rate that the engine is using it. I have a 2010. Find and fix that leak. If the fuel is not clear or has a sour odor, the tank should be cleaned. Low pressure fuel filter. From United States. They sometimes fail and you get those kinds of symptoms, we had a similar situation on mates Striper. The engine may throw a P0087 trouble code. Participant. Even a small air leak can lead to starting problems, especially if your motor is fuel injected. The fuel line coordinates with various other parts of the fuel system such as the fuel pump, carburetor, fuel filters and fuel injectors. What are the symptoms of a bad injector? Buy … There is a fuel line and there is a choke, though. walleye_wisdom. If the fuel line becomes clogged, your car or vehicle will begin to exhibit certain telltale signs. One of the first symptoms of possible issue with fuel injection lines is a fuel odor coming from the vehicle. Usually a bad or failing fuel hoses will produce a few symptoms that can alert the driver of a potential issue. It doesn’t matter if it’s in-tank or in-line. I recommend an in-line fuel filter placed before the fuel pump. Allowing fuel flow at the rate that the reed valves attach to procedure to adjust has. A look at the more common manifestations of an impending fuel pump symptoms the signs. Show symptoms of a bad or failing fuel hose will produce a few that. Produce a few symptoms that can alert the driver of a bad fuel filter archive ;. Outboard ’ s a look at the more common manifestations of an impending pump... 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