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Install fuel lines McCulloch 1838av chainsaw

Need to install fuel lines and prime bulb

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To replace the fuel line you need to remove the cover over the carb and the fuel cap. (empty all fuel from tank) then use a small gauge wire to fish out the end with the filter in the tank. attach a small piece of small gauge wire to the fuel line. then remove the old line from the carb and pull the old line back from the tank. to anstall the new just reverse the operation.

Posted on Nov 24, 2014

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Posted on Jan 02, 2017

  • 384 Answers

SOURCE: mcculloch 4600 chainsaw fuel line routing

Shouldn't be that hard to do. Possible paths 1) Run hose from tank fitting to Carb fitting. 2) Run hose from tank to shut-off vale to Carb 3) Run hose from tank to shut-off to prime to carb 4) run hose from tank to shut-off to prime to filter to carb. Omit any item not on your saw.

Posted on Jun 12, 2009

dontbother10
  • 2220 Answers

SOURCE: I have a McCulloch 3200 chainsaw on which I

From the fuel tank to the carb, from the carb to the primer, from the primer back to the fuel tank. The bulb sucks fuel through the carb excess fuel is returned to the tank. HTH
Lou

Posted on Oct 08, 2009

dontbother10
  • 2220 Answers

SOURCE: my McCulloch chainsaw 3200 internal fuel line in

Try your friendly neighborhood chainsaw seller/mechanic. Take a piece of the old hose with you.

Fuel Line Replacement
SmallEng.com
http://www.youtube.com/watch?v=JrXpU70Hmi0
Routing runs from fuel tank to carburetor, (if equipped) through carburetor to primer bulb, bulb returns excess to fuel tank.

Posted on Oct 13, 2009

dontbother10
  • 2220 Answers

SOURCE: Has Ryobi RCS 3535A chainsaw a fuel bulb priming

The numbers you supply don't cross to an operators manual but that is typical of Homelite/Ryobi. I'm going to make an educated guess that it does not have a primer system. Other Ryobi saws with primer systems include it in the specification. The 3535A does not. Close scrutiny reveals no primer.
IMO fuel primers on chainsaws are one more source of problems. In the USA ethanol additives attack fuel hoses. Without a primer routing is from the fuel tank directly to the carburetor and much simpler to replace. Primers on chainsaws operate differently than 4 cycle engines too. No fuel is injected into the carburetor or engine, its only purpose is to ensure the carburetor is full of fuel,
Typical Fuel hose routing:

  • The hose in the tank with the filter on the free end connects directly to the carburetor input connection.
  • If the saw is equipped with a primer bulb, an output line from the carburetor connects to the suction side of the primer (once the bulb is collapsed it draws fuel from the tank through the carburetor to refill as it inflates).
  • The pressure side of the primer returns displaced fuel to the tank as it is depressed.
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HTH
Lou

Posted on Nov 15, 2009

  • 1 Answer

SOURCE: McCulloch,Mac 3200 Chainsaw fuel lines...........

retgmdI need the same, did you ever find one?

Posted on May 27, 2010

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2 Answers

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

90HP Yamaha won't turn over


It sounds like you have a air line busted somewhere i had one of my outboards do that it wouldnt prime for anything so i ran everything down checked the fuel pump and cleaned that out tore apart the carbs cleaned them bought brand new fuel hose still scratching my head i took off the air lines for the carbs and put new ones worked like a champ

Aug 22, 2012 | Boating

1 Answer

My chainsaw (Homelite UT10514) will not prime fuel. I have changed the primer bulb and checked the fuel lines for damage, they seem to be in good shape.


You need to make sure the lines are connected properly to the bulb. Also, if the carburetor diaphragms are not working properly the carburetor will not prime.

Feb 12, 2011 | Homelite Garden

1 Answer

Fuel leaks bulb not priming.


If you have a leak the bulb will not prime. Over time the either the rubber on the primer bulb gets a pin hole in it requiring bulb replacement or one of the fuel lines cracks and introduces air into the lines. Unless the system is completely sealed the primer bulb will not work. Make sure all of the connections on the fuel lines are tight and correct the system leaks.

Thanks for choosing FixYa.

Kelly

Aug 27, 2010 | Ryobi Snap In Primer Bulb Pump 683974 ...

1 Answer

The trimmer will not start, the prime bulb sticks when pressed, gas is not flowing through the carburator


Many things can cause the unit not to start (see www.zama.com) for troubleshooting their carbs and what causes a no-start condition. If the purge/prime bulb is sticking..there could be a bad fuel filter in the tank with a side condition of bad fuel lines...ruining the vacuum action needed to operate the bulb correctly. It helps to understand (and you may) just what the purge/primer bulb does. It "pulls" fresh fuel into the body of the carb by "pulling" out any air and old fuel in the body of the carb...then it "pushes" this air/fuel mixture (with new fuel lines you can see this) back to the fuel tank. ...and it sounds like you need new fuel lines also.

Jul 14, 2010 | Troy Garden

1 Answer

PRIMER BULB WONT PRIME


I would recheck the carburetor to make sure you put the diaphragms next to the carburetor and not the gaskets.
Please if it is not priming you may have the fuel lines hooked up wrong. Also check the fuel cap to make sure the vent assembly is there. If the tank is not venting, the tank will get a vacuum in it not allowing fuel to flow.
HTH
Good Day.

Nov 11, 2009 | Homelite 'Yard Broom' Leaf Blower

3 Answers

Weedeater blower will not prime


The primer bulb sucks fuel from the tank to the carb. When the carb has enough fuel the remainder is sent back to the tank. When you replaced the fuel line did you use the exact length of line and did you re-install the filter. On some of the trimmers the filter is weighted and holds the line in the fuel. Good luck...Lee

Sep 24, 2009 | Ryobi 30 Cubic Centimeter Curved Shaft Gas...

1 Answer

Primer bulb won't prime


it sounds like the filter on the fule line is cloged try to remove the filter and then try to prime the trimmer. it it does you need to replace the filter. just about any filter that will fit will do.

Jun 05, 2009 | Troy Bilt Tb70ss Gas Trimmer

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