5/16″ fuel line can be used in up to a 115 HP outboard engine. The same goes for fuel lines. Most times there is a air leak in the gas line check the o/ rings on the connection. Outboard Motors > Topic: Gas primer bulb going flat! What Size Fuel Line To Use For An Outboard, 5/16″ or 3/8″? 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. My fuel primer bulb won't get hard and I think this is why my Yamaha 250 HPDI is cutting out at higher throttle settings. 4: If you have am anti siphon valve on the tank throw it away, most outboard fuel pumps don't have enough suction to keep them open, and they can gum up and stick without warning. We provide fast shipping and inexpensive shipping. In under two minutes, you could learn how to solve the problem for good! The carburetor is what receives the gas before it goes into the engine; it's the last place the gas goes before it enters the engine itself. The carburetor is a part of the engine that mixes fuel and air together to make a combustion. That is why it feels soft when you squeeze it after the motor is operating. A small engine primer is a bulb of plastic with a hose running through it. I have not experienced a "soft" bulb all during the winter months when I've been out. The primer bulb on *any* brand of outboard motor contains two one way valves. When launching the boat the next morning, the bulb is always soft. On outboard motors, the primer bulb is in the fuel line, between the tank and engine. I replaced the bulb and it will not get hard. The primer bulb creates the initial flow of fuel between the inboard, built-in fuel tank and the carburetor, in low-pressure, carbureted outboard motors, or between the fuel tank and the vapor separation tank -- and the electric fuel pump -- on electronically fuel-injected motors. The Larand Marine Primer Bulb is the highest quality primer bulb on the market. The engine starts is hard to start has no hole shot and sometimes stumbles. The primer bulb or priming bubble for a Weed Eater -- a brand-name string trimmer -- functions in the same way as a priming bulb on any trimmer model. Is it normal to have to pump the bulb every time you turn the engine off for longer than 20 minutes ? pumped it up and it was good the rest of the day. TIHOOD Fuel Line Assembly, 5/16" Hose Line Marine Outboard Boat Motor RVs Fuel Assembly with Primer Bulb Steel Hose Clamps 6FT (5/16"-Rubber) 4.1 out of 5 stars 222 $13.98 While boating yesterday the RPMs slowly wound down to zero and stalled. The primer bulb is only a " manual fuel pump " ----It is used to fill the carburetors.-----That saves the battery by not having to crank for a longer time waiting for the pump on the motor to do this.----Or it saves one from getting " popeye arms " on a manual start motor.-----Put the bulb … If there is a restriction or a kinked fuel line between the gas tank pickup tube and the primer bulb, then the bulb may flatten out due to the excessive vacuum that builds up. Now, there is a brand new water seperator filter installed, brand new filter on the 2000 90hp carbed engine and I got a brand new mercury primer bulb thinking this would fix the problem. Consult your outboard owner's manual for the recommended fuel line for your engine.) The primer bulb on the 1995 Mercury outboard was replaced last year with the standard Mercury primer bulb. SIM Yamaha carries Yamaha OEM discounted engine parts and Yamaha maintenance parts and accessories for Yamaha outboard motors. Here is a more in-depth break down of the differences in the hoses and the biggest reasons why it is important to have the right ones installed! (318)347-7380 ... Gas primer bulb keeps going flat if motor doesn't run. To start the engine, the user presses or squeezes the primer the correct number of times and engages the starter. When the primer bulb is squeezed, the pressure created closes the inlet valve and opens the outlet valve, allowing fuel in the bulb … 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. 2: the only aftermarket primer bulb I would use is a Sierra (Shields Hose). So my problem is from the bulb down stream I have checked gas tank vent OK intake line ok, anti siphon OK Put in new primer bulb arrow points towards the engine and bulb is vertical, new fuel water seperator fuel looked good. Anything above that has to be a 3/8″ fuel line. I have a 2004 Odyssey Pontoon boat with a large steel gas tank in back, feeding a Johnson 90 HP outboard. Primer ball in the fuel line seems to be hold 50 HP Mercury 2-stroke losing power at wide open throttle Things that have been suggested from bar stool Merc techs: fuel filter, fuel pump, fuel line/primer … Press until both tabs re-seated in locking slots. It fits easily in your hand, and pumps fuel quickly. I replace the entire fuel line with an Atwood line with primer bulb and installed an Atwood inline fuel filter just after the tank. ADD SPACE Laurie Cork Ph. SIM Yamaha is a USA Yamaha outboard motor and outboard motor parts dealer. one thing to check would be your primer ball. 4.0 out of 5 stars 88. FREE Shipping by Amazon. 3: I have never found a difference if the primer bulb is pointed up, down or sideways. When you squeeze the bulb, the inlet valve closes and the outlet valve opens forcing the gas that's in the bulb to be pushed towards the engine (there's A blocked outboard fuel line prevents fuel from getting to the motor. Portable boat gas tanks, outboard fuel tanks and accessories let you enjoy the most of your time on … We have changed the filter on the fuel sperator. $25.99 $ 25. A primer bulb that's lost its suppleness doesn't respond as a new one does. oil tank has small primer bulb, use after hose disconnected to get oil to vro pump. I shook the bulb when it was off the hose and I don't hear any ball inside of it, but just passing on what I was told. It’s simple, practical, and does the job you need it to. We have changed fuel lines. We have blown out the pickup. The bulb will not get firm and the filter doesn't completely fill. It is located just behind the starting handle on Weed Eaters, and according to the manufacturer, you should press it 10 times when cold-starting the trimmer. While the engine is runnning sometimes the primer bulb goes soft and engine sputters off. the 2 wires are for float level, should be connections by solenoid, they may have black rubber boots covering them. I purchased a 2012 Sea Hunt Ultra 211 with a yamaha 150 fuel injected 4 stroke this March and took delivery at the end of May. Scepter marine products fuel you from the shore to the lake. Fixed it the same way. In turn, the primer bulb is no longer hard but still holds it shape under the vacuum. We have run a test by bypassing the fuel seperator. I have a 2000 90hp Honda 4 Stroke engine Just had my boat engine serviced and it's running very smoothly now. Just as a precaution, I also keep an extra Yamaha Marine Fuel Water Separating Filter and filter wrench and an extra Yamaha primer bulb on my boat at all times in case I … MarineEngine.com 184 Jones Drive Brandon, VT 05733 USA (800) 209-9624 (802) 247-4700 (802) 419-3055 Fax Still … But blockages don’t cure themselves. When the bulb goes flat just crack open the gas cap, if the bulb inflates then you have a blocked fuel tank vent line. Press into primer cavity lining up locking tabs with locking slot in cavity. The question I have is when running (about 3500 rpm) my buddy notice the gas primer bulb … the original setup used scissor connectors, later used grey plugs, the connections on engine would be under black panel(3 sets of wires in/out). Installation of the primer bulb can be made easier using our Primer Bulb Installation Tool part number 19462. 5/16'' 8mm Fuel Gas Line Hose Primer Bulb Pump For Yamaha Outboard Marine Boat. We have changed to a top quality primer bulb. Use a primer bulb whose connections are sized to match your fuel lines. OK WOT she starves for fuel looses power bulb goes soft/flat. On many small engines, this involves pulling the starter rope, although some small engines have an electric starter. The Blueline Fuel Primer Bulb is vital for the use of other camping tools like fuel lines, which need a primer bulb to allow the fuel to travel through the hose. 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. This hose feeds from the gas tank to the engine carburetor. Most small engines will not start if the carburetor is dry. ? Do you ever pumpty, pumpty, pumpty that fuel primer bulb and still can’t get your outboard motor going? Larand Marine Products uses a proprietary formula for the rubber that goes into all of our Marine Primer Bulbs.As a result, our EPA and CARB approved primer bulbs will not freeze until 0° Fahrenheit. Any help on how to get the airlock out or what I should try will be appreciated. SIM Yamaha also sells Yamaha outboards at discounted prices. Usually the night before I go fishing, I pump the primer bulb up while preparing the boat. This helpful YouTube video by Succstrat explains what might be affecting your ability to get going. Fifteen minutes later, same thing. 99. I love the boat and just took it back to the dealer for the 20 hr service. I'm using the Quicksilver bulb from Mercury. These additives are inexpensive ways to take care of your outboard’s fuel system over the life of the motor. 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. 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