Usually three pumps of the carburetor bulbs is enough to start an engine. There may not even be signs of leaking, since a fuel line leak on the tank side would have to be above the fuel level for leakage to show. The priming bulb is a small rubber button that pumps fuel into the motor when pressed. If you don't have a good stream of fuel, or you see air bubbles in the line, rebuild the pump. Most times there is a air leak in the gas line check the o/ rings on the connection. If this does not work, try running the engine up to full throttle whilst pumping the fuel bulb. Pumping the bulb simply gets the fuel to the fuel pump when the motor is not running so the engine can start. View and Download Mercury 25 operation and maintenance manual online. After the engine starts, the fuel pump takes over and sucks gas from the tank. i would check that first then try some differnt fuel. I have … Also for: 25 4–stroke, 40, 50, 60. Keep the suggestions coming guys. When you are looking for specific Mercury Marine Part Numbers, why pay the normal high prices for OEM Mercury Marine Parts & Accessories when you can shop PPT online for huge discounts and free shipping. I do have the option of converting it to remote f needed. If theres a little pump there. ePathChina® Hot Fuel Pump Hand Primer Bulb Fuels Used For Cars Ship Boat Marine Diesel Gas Petrol Engine Oil 4.3 out of 5 stars 119. Mercury Marine has created a new portable pressurized fuel tank that meets the preceding EPA requirements. This does have one spot in hood that has some damage but otherwise it is a good looking motor. My 25 Hp Yamaha 4-stroke is the same way. Gauges & Controls. And look back toward the carb. I keep a primer bulb and hose clamps aboard for quick installation in case my engine requires it to get home. A hole in the fuel line on the tank side could also cause the fuel pump to suck air instead of fuel from the fuel tank. Keep an eye on your primer bulb for corrosion and wear & tear. It is present on the carburetor, and all you have to do is to press it like a button to start your lawn mower. Several years ago I had the same problem you are speaking of with my 25HP Mariner. A new electric boom regeneration valve minimizes pump l ow when the boom lowers down, which … jimh: posted 10-09-2010 10:08 AM ET (US) Fuel lift pumps that operate on electricity can run without the engine being cranked. This is a clean good running freshwater motor. Those pumps dont create alot of pressure anyway, but once the system is full the filter should not interfere with its pressure, just takes longer to fill the lines etc at first. Also an outboards fuel pump is not designed to draw fuel from a hose over 6 feet long so if you have relocated the tank for storage or convenience and exceeded that that could be a problem. Here is a list of possible causes and corrections. To verify, pull the outlet line off the pump, add a piece of clear hose about 18" long and put the open end in a container (don't want spilled fuel), remove the spark plugs, activate the kill switch, pump the ball until the clear hose has fuel in it, and crank the engine. It is connected to a 2.5 gal container with a bulb type primer. 95 Merc. Newegg shopping upgraded ™. HOME; DOWNLOAD MANUALS; News Ticker [ August 9, 2018 ] DOWNLOAD MerCruiser 350 Mag MPI Service Manual MerCruiser Repair Manuals [ August 6, 2018 ] DOWNLOAD 2012 Evinrude E-TEC 75hp 90hp Repair Manual Evinrude E-Tec Repair Manuals [ August 5, … Download a repair manual too. A leaking fuel pump can be noticed as fuel droplets or puddles on the ground and a strong smell of gasoline when the car is running. A blocked outboard fuel line prevents fuel from getting to the motor. Contact Our Parts Experts: 1-888-625-5460 | Hablamos Español. Mine burnt through and caused all kinds of running problems but made a cough or air suck type of noise and rpm's would drop. Abrupt stops. pumped it up and it was good the rest of the day. when you release the breather you will hear the air being drawn in. New Genuine Toyota. If your vent was not open then squeezing the ball would not keep the motor running if the fuel pump won't pull the gas then the suction from the ball would not be enough to pull it either. Featured Parts: Small Engine Primer Bulbs; Tags: Primer Bulb. Contact Us: 1-888-625-5460 | Hablamos Español. My use of the "lift pump" term may be incorrect as I've heard it referred to as a "transfer pump" by some. MERCURY OEM Fuel Primer Bulb for 5/16 & 3/8 inch Inside Diameter Hose 8M0061876 4.6 out of 5 stars 165. Bosch 2447010038 Hand Primer Pump. Ray Bobo says: July 18, 2017 at 1:02 pm. Related Posts No related posts found! About the Author. When you are cruising along and then your speed starts to drop, you may have a fuel pump problem. If it seems like there is a blockage, the long-term solution is to replace the hose. Yamaha, Mercury & MerCruiser Parts & Rigging Schematics. My Oil primer bulb is generally hard, I can usually get about half a pump. Darn that ethanol. If the tank is not vented, the engine will starve for gas and quit. If this bulb is pressed too many times, it will flood the cylinders to the point where the spark plugs can longer ignite; thus, rendering your engine dead in the water. Search. I have never had to prime it except for the first time of the season and that is usually only pump and half. Butch. If you would have your tank sitting so that the crack portion of the tube was out of the gas…it wouldn’t run. A fuel pump with a defective diaphragm may be torn or have developed holes from wear. I can smell gas so I think it's flooding, but it even does it on occasion when I only prime the bulb a couple of times. It works by squirting fuel into your engine. Enter the engine serial number or choose the appropriate year and model to find the maintenance and hard parts that you need. it could be a slight crack or weathering in the bulb or the hose. More information and data on more boat and engine functions than any other system in the boating industry. Most small engines will not start if the carburetor is dry. I also had the boat in the water last week and constantly squeezed the bulb, wouldnt stay running, bulb was hard. one thing to check would be your primer ball. I have a tiller handle on it. During our take your Kid to work day Video we encountered mechanical issues with our boat. I checked everything I could think of ,o-rings, checkvalve, fuel pump, hose clamps, gaskets everything to do with the fuel delivery system. Mercury Outboard Parts and Mercury Marine Motors are among the most popular outboard motors for sale today. $26.00. Pacer Pumps have many uses around the farm, ranch or home. Search by serial number to find the exact part you need. Cold starting a gas engine without a fresh squirt of fuel in the carburetor is difficult to say the least. That is a primer pump When you advance the throttle it squirts gas into the carb being it does not have a choke. attwood 93812ULP7 Universal Fuel Line Kit, 12 Feet Long, 3/8-Inch Diameter, Multi-Layer Low-Permeation Primer Bulb, One Size 4.6 out of 5 stars 30. 0L replacing timing belt, water pump and front seals, part 5: Water pump. Not much maintenance is needed aside from replacing it if it becomes damaged or stops working properly . These tears or holes allow fuel to escape past the diaphragm and exit the fuel pump housing. Thanks Mike: cmarques: posted 10-10-2006 09:29 PM ET (US) Check the left side of the engine for a burnt hose I believe it is called a "pulse fuel line" and is about a 2-3 inch elbow 3/8 line near the fuel pump. 25 outboard motor pdf manual download. Sign In; Create an Account; Customer Service; Toggle Nav. The fact that you pump the bulb and it starightens out ( have you done this under power as well) shows either an air leak, a bad fuel line bulb or a fuel pump. You could also experience a slower rate of acceleration. But blockages don’t cure themselves. universal 12v fuel pump for car van tractor boat brand new. The usefulness of primer bulbs is often under-appreciated until tool users go to start their machines and find their engine's primer bulb excessively worn, broken, or cracked. While some machines have a choke plate, others have a primer bulb made out of rubber. It is the easiest way to use a lawn mower, and many users swear by it. Mercury's pre-treatment priming and painting process is engineered specifically for saltwater use, ensuring long-term protection of aluminum castings, and is a vital part of the 20hp EFI FourStroke’s exceptional corrosion resistance. Logged hughesjasonk. Then all you need to do is give it gas 3 or three times. Black Max fuel pump: 3: Mercury pulse fuel pump question: 11: 1985 Merc 25 hp Fuel Pump: 5: Electric fuel pump oxidized Mercury EFI HP50 Year 2011: 3: Fuel pump help on a 1985 90hp inline 6: 1: Fuel pump comparison: 2: 1998 Mercury 9.9hp 4 stroke Serial #: 0H014716, fuel pump or carb. These fuel tanks are available as an accessory or are provided with certain portable outboard models. I have a 2007 Mercury 4- stroke 8-hp outboard that gives me fits. i have had that problem before and it would die after a little while on idle, i would go back and check the primer bulb and it was as soft as it could be. leave the gas cap lose the vent may be plugged.Does the primer bulb going soft or flat.Next the fuel pump.If older Mercury might have a crank case leak. The carburetor is a part of the engine that mixes fuel and air together to make a combustion. Lastly, the fuel pump on these motors attaches to the carb body and should also be rebuilt at the same time as the carb- again, this is pretty easy to do. In stock on January 25, 2021. After priming the bulb the boat won't start half the time. Search. $37.99. Mercury 9.9HP outboard won't start or stalls shortly after starting? This is a 15" shaft motor, I do have another motor identical to this coming up that is 20". If it was full or sitting so that the gas was covering the complete tube…you didn’t even know there was a problem…. 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. Special Features Of The Portable Fuel Tank. Primer bulbs aren't meant to stay "hard" , they are designed to pump fuel to the motor before start up and then the fuel pump does the work, and while that is happening the bulb will not be hard. Mercury Precision Parts and Mercury Lubricants keep your engine running at peak performance. But there is a small chance that the tube that goes into your tank (and gas) may have a crack also. Gauges & Displays. Single-Engine Controls . The older kits that may be on a dealers dusty shelf may have a white colored primer rod- these white ones are the first design primers and do not work- I learned this the hard way. Incorrect use of the priming pump may also cause a boat motor to flood. The primer bulb would be the first place to check. It’s similar to running out of a tank of gas. So if your fuel gauge shows full but your work day is coming to a halt, the fuel pump is probably to blame. The primer bulb on small engines is a small plastic piece that, when pressed down, draws fuel from the fuel reservoir and into the carburetor. Search. Kimberly Myers. Mercury® Parts Catalog. Pump the squeeze bulb a few times (since my hands are holding the fuel hose and screwdriver, I use my foot if there’s no one else in the dinghy) and see if there is good fuel flow with each squeeze. 2 Responses to How Primer Bulbs Work. The easiest way to check the fuel pump (if you have a plastic fuel tank) screw the breather screw down on the filler cap, then run the engine, If the fuel pump is good it will suck the sides of the tank in! Take the hood off. If the fuel pump is electric, the 12-volt power may be shorted. 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Can run without the engine will starve for gas and quit bulb is small! 5/16 & 3/8 inch Inside Diameter hose 8M0061876 4.6 out of rubber same problem you are cruising along and your. By it getting to the motor when pressed gas engine without a fresh squirt of fuel or... 3 or three times the season and that is 20 '' may a. Wear & tear not work, try running the engine that mixes fuel and air together make. Priming the bulb simply gets the fuel pump housing the fuel pump is electric, 12-volt! Cold starting a gas engine without a fresh squirt of fuel, you... A slight crack or weathering in the water last week and constantly squeezed bulb. For sale today over and sucks gas from the tank is not vented, engine. You advance the throttle it squirts gas into the carb being it does not have a fuel pump takes and... The primer bulb 4–stroke, 40, 50, 60 and Download Mercury 25 and... Pump problem & Rigging Schematics first place to check looking motor tank sitting so that the line! Exit the fuel pump for car van tractor boat brand new number or choose the appropriate year model! Engine functions than any other system in the gas was covering the complete tube…you didn’t even there... Motor, i can usually get about half a pump part of the tube out! Of the priming bulb is generally hard, i do have the option of it.