Does my outboard need a primer bulb?

All outboard motors have fuel pumps which are capable of lifting fuel from the fuel tank to the engine. The purpose of the primer bulb is to prime the fuel lift pump with fuel. If the fuel lift pump is not primed with fuel, the fuel lift pump will have to draw fuel from the fuel tank and prime itself.

What size is the primer bulb for Mercury outboard?

MERCURY OEM Fuel Primer Bulb for 5/16 & 3/8 inch Inside Diameter Hose 8M0061876.

Should outboard primer bulb stay hard?

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.

How do I get air out of my outboard fuel line?

Insert the clear hose into the fuel line, prime up the engine, and start it up! Let it run for a little while and carefully watch the fuel passing through the clear hose. If you see a ton of air bubbles coming from the boat fuel tank side of the hose, then we are hot on the trail to solving this issue!

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.

Are all primer bulbs the same size?

all primer bulbs are not the same size! quit telling everybody it will fit just because it fit yours… Shoppers find videos more helpful than text alone.

What size is mercury fuel line?

Mercury/Mariner O/B Standard Fuel Line Assembly, 6′ x 3/8″

How many times should you squeeze a primer bulb?

Long Term. Most seasoned boaters replace the primer squeeze bulb and hose assembly once every two years, and keep the last used one for a good spare.

Should primer bulb be before or after fuel water separator?

How to Prime a Fuel System on a Boat: Make sure that the primer bulb is on the engine side of the water separator bracket. Remove the fuel hose that is leaving the primer bulb and going to the engine.

Should the primer bulb stay full?

the primer bulb should be mostly fuel, check the lines they get old and start cracking. replace with tygon. there is a fuel pump in the carb operated by pulses from the crank case, the diaphragm in it can can go bad also.

How do I know if my boat primer bulb is bad?

Either the engine randomly runs out of fuel and dies. After turning the engine off and letting it sit for a couple of minutes, you have to prime the primer bulb up again. Or there is a running issue, where the engine is not getting wide-open throttle and spits and sputters when you get up and going.

Do I need a primer bulb?

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. It has a crack in it.

How do primer bulbs work?

How It Works. Pressing the primer bulb creates a vacuum that sucks gas from the fuel tank through the fuel lines and into the carburetor. Pressing the primer only a couple times should supply enough fuel to mix with air in the carburetor , and be ready for combustion.

What is a primer bulb?

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 .