Victa Decompressor Troubleshooting

Learn how to Troubleshoot a Victa Decompressor.


    • 3/4 Wrench
    • New Decompressor

Step 1

Check around the decompressor for oil/fuel as this can suggest problems.

Step 2

Next test the decompressor sucking on the nozzle and checking if the valve moves. you can also blow on the nozzle and no air should come out of the decompressor.

6 Responses to “Victa Decompressor Troubleshooting”

  1. thanks for the very helpful video guides, guys.
    It looks like my decompressor is slightly different. Instead of two halves clipped together, mine is a single piece. Is there any way to open it up and replace the internals ?

    • lachlan Osmotherly March 1, 2015 at 1:40 am Reply


      Unfortunately those decompressors are not serviceable and there is no way to open them without cutting/grinding.

  2. geoffrey mcmaster August 12, 2016 at 5:22 am Reply

    my victa revs up can’t control revs then it backfires and stops. could be trouble with leaking crankcase?

  3. thank you . my 2 stroke victa decompressor does have oil leaking , but sucking on it the valve does return. I reinstalled it and it started ok then revved up a bit then I adjusted the throttle so it didn’t over rev,and I ended cutting most of my lawn, then all of a sudden it revved up and stopped, then it wouldn’t start.

    • lachlan Osmotherly August 23, 2016 at 3:18 am Reply


      Oil leaking from the decompressor is a sign that it is not working as well as it should be. Suddenly revving up & stopping is a common symptom of carburetor problems, This happens most often because the mower cannot get fuel as the mower staves of fuel the mixture becomes lean causing rpm to increase before it completely runs out of petrol.

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