Most of the newer fuel injected engines don’t really need them, but you will need it to refill an emptied fuel filter in the hull. My 2014 Mercury 150 hp 4 stroke does not have a primer bulb. And it starts every time on the first try.
Is primer bulb necessary?
A primer bulb is important because it is helps to fill the carburetor with the correct amount of fuel. It does this by pulling fuel through the fuel line. You may need to fix or replace your primer bulb if: It is not creating proper suction.
Should primer bulb outboard stay hard?
Re: Primer bulb – should it stay hard? Well yes, it should get hard and stay hard unless there are leaks. It’s a pressurizing system that sucks up fuel on one side (low pressure) and forces it into the carbs on the other side (high pressure). As the pressure increases, the bulb get’s harder.
How do you prime an outboard motor?
turn the key on,push in fuel primer switch. start engine while holding fuel primer switch in. once engine starts release key and primer. sometimes you have to bump the primer switch occasionally as engine is warming up.
Can I bypass the primer bulb?
No, it won’t work depending on the engine design. Without going into details the primer bulb forces fuel to the carb jets and not the engine directly. It also forces pressure and vacuum. Without the bulb your carb will be flooded on a permanent basis.
Does primer bulb go before or after fuel water separator?
You should have the primer between the motor and the filter. That way, if you see the bulb collapsing you know that your filter is clogged. The suction from the fuel pump will suuck the primer ball flat if there is a restriction in the filter. You should have the primer between the motor and the filter.
Does a 4 stroke outboard need a primer bulb?
The only time you need a primer bulb with modern outboards is to initially prime the fuel system. Basically only when new engines are installed or if you run the boat completely out of gas.
What causes a primer bulb to go flat?
Most common cause is a blocked air vent. Close third is a bad anti-siphon valve. A bad check valve in the primer bulb is a possibility also. To check for a vent blockage, run with the fuel filler cap off and see if the bulb collapses.
What are the symptoms of having air in the fuel line?
Air bubbles in a fuel line can lead to stalling, hiccuping or refusal to start. Keep your fuel lines free of air to help keep your car running smoothly. Air bubbles in a fuel line can lead to stalling, hiccuping or refusal to start. Keep your fuel lines free of air to help keep your car running smoothly.
What are the symptoms of a bad fuel pump on an outboard motor?
From smooth sailing to a bumpy ride
Sputtering or misfiring is another sign that the fuel pump may be on its way out. When the pump is not providing fuel consistently you will experience sputtering and may even find that the engine dies while the machine is still in motion. It’s similar to running out of a tank of gas.
Why is my outboard not getting fuel?
A blocked outboard fuel line prevents fuel from getting to the motor. 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. … When this happened to us recently, the solution was pretty simple: a new hose.
What causes boats to lose prime?
Why Does My Outboard Lose Prime? Outboard engines lose fuel prime because of an air leak in the fuel system. Somewhere between the engine and the fuel tank.