Question about Bolens 31cc 2-Cycle Gas Cultivator BL410

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Engine wont start

Primer bulb

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My prime bulb looses pressure and first start is hard. I have to remove fuel line from filter and cover with thumb prime re install then first start takes time.


Does the engine run fine after it starts? Most common problem with primer bulb losing prime is an air leak in the fuel line or primer bulb. Air leaks don't always leak fuel. If there is an air leak between the primer bulb and gas tank there is no pressure, only vacuum. If it is not a major leak it might not leak without pressure but it will allow air to enter the fuel line. If it is a very minor air leak it could allow air to replace the liquid in the fuel line over time, but so little air once it is primer again that the fuel pump can over come it with volume of fuel.

Primer bulbs do not stay firm, as they are when initially pumped up, after the engine is running. There are check valves in the primer bulb that hold pressure in the primer bulb and throughout the fuel line to the engine. Once the engine starts the fuel pump creates vacuum drawing fuel into the engine diminishing this pressure and releasing the check valves. At this point the primer bulb is just another segment of fuel hose allowing fuel to pass through it as the fuel pump demands. The primer bulb functions much better when the outlet side is higher than the inlet side. This position makes it easier for the check valves in the primer bulb to seat and release as needed. If the primer bulb is functioning properly and is positioned with the outlet side higher than the inlet it should not be necessary to cover the end of the fuel hose with your thumb to get it to prime.

If the engine is hard to start after being fully primed there could be a problem with the fuel system on the engine. Some engines are hard to prime once air has entered the system, especially fuel injected models.

Dec 19, 2014 | Boating

1 Answer

Where is primer bulb


Not every small engine has a primer bulb. But you can look on your carburetor and if you have a primer bulb you will see a plastic dome shaped bubble that if you press on it you will feel slight pressure of gas pushing up into carb. These primer bulbs help to start engines quicker. GOOD LUCK FRIEND.

Nov 22, 2014 | Garden

1 Answer

4 lawn mowers same problem wont start until I prime the by hand. Briggs Stratton 917.387500/ 12AV566n01124987/20043/SDSP2245D Will the same primer bulb fit the above mowers.


If its identical it should work ,if not take the old one to a mower shop,to get correct one and make sure the choke is going right on when the cable is in choke position.

Aug 05, 2014 | Ryobi Snap In Primer Bulb Pump 683974 ...

1 Answer

My Ryobi 4 cyl 30cc leaf blower just quit starting. Has always started perfectly, but now it just wont start.


replace spark plug.if spark plug okay problem could be carburetor or air leak at fuel lines or check primer bulb for crack which cause air leak.any breaks in fuel line or primer bulb cause air leaks fuel system cause carb not get fuel run engine.

Sep 20, 2013 | Ryobi 30 Cubic Centimeter Curved Shaft Gas...

1 Answer

I cant get it to start. The primer bulb wont refill with gas


The bulb pulls fuel from the carb into the bulb and back to the tank, if the bulb does not fill it is because there is a fuel blockage, either in the fuel filter in the tank, or the screen in the carb itself.

Jun 03, 2012 | Echo 135 mph 390 CFM Gas Blower PB-250C

1 Answer

I can't start my powerwasher. Where is the choke?


This Power washer has a 3.75 hp Briggs and Stratton Engine. It does not have a choke but does have a primer bulb. You must depress the primer bulb at least 3 times to start the engine. The primer bulb is on the side of the carb. It can be black or red. If your still unable to locate the primer bulb please provide your ENGINE model number and I will provide you a link to a diagram for the location of the primer bulb.

Thanks for using FixYa.

Kelly

May 29, 2010 | Briggs & Stratton Gas Pressure Washer...

1 Answer

The fuel primer does not fill and the engine does not start.


I would consider a clogged fuel line or a defective primer bulb. Replacement bulbs are available at numerous retail outlets that sell lawn care equipment. I take the old one with me for comparison purposes. You say that the engine will not start. Will it start if you apply fuel or starting fluid directly to the carburator? If the engine will run in that situation, then I would consider the primer bulb or a clog in the fuel system as the cause of the problem. Hope this helped and best wishes.

Sep 02, 2009 | Garden

2 Answers

Leaf blower will not continue running unless primer bulb is pushed intermittently


Hi

Priming the engine(put some gas in the sparkplug hole)..If.Start the engine.If only the gas from the cilinder is burned change the lines prom primer bulb.

best regards savumihai71

Oct 25, 2008 | Craftsman 4 Cycle Blower/Vac

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