Primer bulb not pumping gas

Sometimes the bowl gasket and the o ring around the venturi tube deteriorates and the air delivered by the primer bulb leaks out - without displacing the fuel. If the fuel level in the float bowl is maintained at a level lower than specified the air shot from the primer bulb is unable to deliver the fuel the added distance from the fuel level to the venturi.

Weedeater Poulan Not Pumping Fuel After Primer Bulb Replaced Fl1500 Doityourself Com Community Forums from www.doityourself.com

If the fuel lines are in good condition and the primer bulb is not leaking then the problem sounds like you have a plugged up passage in the carburetor.

Primer bulb not pumping gas. Ryobi gas trimmer primer bulb hookup 5 Answers The gas lines to the primer bulb of my Ryobi 790r string trimmer primer bulb have literally rotted away and I must replace them. There are 2 connections to the bulb2 to the gas tank and 2 to the carburetor. I need a diagram to tell me how these should be interconnected and nobody seems to know.

Report This by Manage My Life. I have replaced the primer bulb and gas tank assembly. Bulb still not pumping gas to carb.

Get more answers from the people in your networks. A black main hose a clear yellow drain hose and a black vent hose. I have pulled the main hose out of the tank with a long wire.

On the end of the black hose was a filter. I pulled off the filter and put the hose back in the tank to see if the filter was clogged. If you are pressing the primer bulb and it returns to the original position but does not draw up gas into the fuel line then you probably have an air leak in the intake line.

The reason could be that the fuel line is the wrong size and is not fitting tightly enough or that the line with the filter isnt submerged in the gasoline in the tank. If the primer bulb is held horizontally. Then most of the time it will not prime anything at all.

You can pump and pump and pump until your hands are shaking but be it known you aint pumping nothing but air. Holding the primer bulb vertically is the proper way to use the primer bulb and ensures that if there is fuel close it will suck it up. Briggs and Stratton LAWNMOWER PRIMER BULB PROBLEMS.

WILL NOT Cold START. Unable to prime-bulb wont firm up. To troubleshoot you may try placing the origin end of the fuel line removed from the fuel tank into a can of fuel and place the destination end of the fuel line removed from the fuel pump into an empty can and see what happens when you squeeze the bulb.

You can get just the check valve for the carb. Problem is that may NOT be your problem. If fuel is making it to the primerpurge bulb then fuel is ALREADY in your carburetor.

A weak vacuum in the carb would cause the engine to burn off ALL the fuel that the bulb was able to siphon and die lean. I replaced the primer bulb on my 65 hp BS but still have to pump 40 or more times or pour gas in carb to start Can hear a little suction noise and see a little fuel in base of bulb housing but not enough to start. Runs fine once running.

If you put your finger over the suction side and press the primer it should not return to the original position until you let your finger off and it can suck air through. If it does return to original position then the check valve is messed up and the primer isnt pumping anything its just pushing in. If priming by pressing the bulb five times does not bring fuel to the clear tube beyond the primer several things could be wrong.

Inspect the clear tube at the output of the primer bulb. If gas is present in the tube the system may be flooded with gas already. Aug 22 2009.

Primer bulb is not getting stiff. There are several things that can cause a primer bulb not to get hard. Air leaks in the fuel lines after the primer bulb a bad fuel pump leaks in the fuel lines after the fuel pump and finally a bad float or worn out needle valve in the carb.

Then today after the boat had been sitting un-used for 24 hours again I felt the primer bulb and again I noticed that it was not hard. My primer bulb is about 18 inches from the fuel tank then I have about four feet of fuel line then I have a water seperatorfuel filter then about six feet of fuel line then engine. When I press the primer bulb it goes down easy and comes up easy but it is not pulling any gas from the tank.

I thought it may be something with the filter so I detached the filter and reinserted the line in the gas tank and pumped the primer bulb for about a minute and still nothing. 06-18-2012 0345 PM. Fuel Primer Bulb Wont Get Hard.

The arrow is pointing with the flow on the fuel line. There is no up or down. WELL yes there is.

The bulb has a one way valve in it so the fuel doesnt go back down the hose. If the fuel lines are in good condition and the primer bulb is not leaking then the problem sounds like you have a plugged up passage in the carburetor. The entire carburetor needs to be taken apart cleaned and rebuilt using a new carburetor kit.

When the primer bulb isnt working it may be a problem with the bulb itself with the fuel lines that feed fuel to the bulb or both. Since primer bulbs and tubes are both made of flexible plastic. Discussion Starter 1 Jul 29 2008.

I have a Craftsman 18 saw 358350180. When I prime the saw to start it the primer bulb pressurizes the fuel tank. Saw wont start and fuel leaks everywhere.

There must be a vent on the darn tank but I cant find it. The cap vent is a duckbill but only lets air in not out. When the primer bulb isnt working it may be a problem with the bulb itself with the fuel lines that feed fuel to the bulb or both.

The same goes for fuel lines. When theyve hardened and cracked they let in air which makes it impossible to draw the fuel into the carburetor properly. Joined Oct 13 2008.

2 Feb 1 2016. The primer isnt a primer at all it is an air purge for the carburetor system. Yes the little white thing hanging out in space is a tank vent - supposed to let air in and not out.

When you pinch off the fuel lines and let up on the primer on the return of the bulb is emptying what. When the primer bulb isnt working it may be a problem with the bulb itself with the fuel lines that feed fuel to the bulb or both. The same goes for fuel lines.

When theyve hardened and cracked they let in air which makes it impossible to draw the fuel into the carburetor properly.