Victa G4/LM Carburetor in Depth Dis-assembly guide

Learn how to correctly disassemble a g4 carburetor

Tools/Parts Required 

  • Flat Head Screwdriver
  • Multi-Grips
  • Carburetor Cleaner

Step 1.

Remove the main jet and and then carefully detach the Primer Cap, be mindful to keep track of the small parts and check them for damage as shown in the video.

Step 2

Examine the top of the carburetor for any cracks that may cause air leaks. Remove the top cover and be careful not to lose the spring.

Step 3

Next remove the retaining clip and inspect the diaphragm for damage or stiffness as shown in the video. Be careful not to lose the smaller spring under the diaphragm, then remove the lifter.

Step 4

Next remove and Inspect the poppet valve for any damage. Take a look at the ignition wires, there will be a rubber cover over top of one wire, and another wire holding this rubber cap in place – it must be removed before removing the rubber cap. When the rubber ignition cover has been removed you may remove the second wire – it should have a rubber plug covering its end.

Step 5

We will now remove the throttle cable. Turn the throttle to the stop position, remove the throttle clamp, then lift the now exposed throttle cable up and out of the groove in the carburetor body which holds it in place. With the throttle removed inspect the cam to ensure it moves smoothly.

Step 6

Finally ensure that there are no holes or cracks in the decompressor hose or the carburetor body.


  1. Hi Guys,
    Do you have a throttle cable assembly for sale that has the brass ball at the end of the cable and if so what is the cost?
    I have seen a throttle cable that is for a Victa mower locally but it is the Z type. Bit reluctant to buy it in case it won’t work if I put the Z end into the hole on the cam where the ball type throttle cable goes. Can you advise?

    • Hi Dayo

      Send us an email to “” with the outer sheath length and the inner cable length of your old throttle cable and we can see if you can order you a suitable replacement

  2. Hi my Victa 1997 power torque lawnmower with a g4/lm carburettor starts in start but when I put it on Run, it cuts out.

    I have replaced the head gasket as it needed it badly and cleaned that area.

    I have cleaned the carburettor and reassembled. I bought a cut out plug through you and replaced it.

    Can you advise next step/s from here please? Thank.

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