Optimus 930 problem

Discussion in 'Fettling Forum' started by stuartc, Sep 9, 2021.

  1. stuartc

    stuartc United Kingdom Subscriber

    Offline
    Joined:
    Feb 9, 2021
    Messages:
    105
    Location:
    Ayrshire
    upload_2021-9-9_10-25-42.jpeg
    upload_2021-9-9_10-25-42.jpeg upload_2021-9-9_10-25-42.jpeg upload_2021-9-9_10-25-42.jpeg Decided it was time to tackle this lovely little lamp, so after a clean and basic service it passed its leak test in water.
    Fired it up first without a mantle and thought it looked ok so fitted a Veritas 3776 (200CP) mantle and burned it off then proceeded to light it - 3 minutes pre-heating then 15 pumps and it lit no bother.
    There was a little flame outside the mantle (should you expect to see a little or none) and after a period I noticed a small leak from the excenter nipple area.
    With these issues I decided to break it down again and recheck all connections and this morning started it up again and had worse results than before :rage:
    D2C243E5-6E72-4151-9E3C-0CBD495ACE82.jpeg D9103B36-A84A-440A-9FEF-F5566D2588F4.jpeg
    I damaged the mantle when working with it which is why it’s missing in the later photos.
    I would really appreciate any wisdom you lovely people are willing to share regarding my next move - jet?, mantle? etc
     

    Attached Files:

  2. JEFF JOHNSON

    JEFF JOHNSON United Kingdom Subscriber

    Online
    Joined:
    Nov 28, 2010
    Messages:
    16,666
    Location:
    Shetland Islands UK..
    The most likely cause is that the vapouriser's jet is enlarged or loose or both.
     
  3. stuartc

    stuartc United Kingdom Subscriber

    Offline
    Joined:
    Feb 9, 2021
    Messages:
    105
    Location:
    Ayrshire
    Hi Jeff, I am fairly happy all was tight enough. There was no leaks when I dunked it in a bucket of water and rechecked tightness this morning so I may need to look at ordering a new jet. Thanks
     
  4. Fireexit1 United Kingdom

    Offline
    Joined:
    Jun 13, 2020
    Messages:
    3,525
    Location:
    Brighton UK
    30-40 pumps on a 3/4 full tank is what is in the original instructions I believe. In the picture where you have blue flamelets the flames are jumping off the nozzle. Where you have orange you have flames touching the nozzle. Possibly a sign of low pressure with no mantle fitted. A new jet never hurts tho..
     
  5. stuartc

    stuartc United Kingdom Subscriber

    Offline
    Joined:
    Feb 9, 2021
    Messages:
    105
    Location:
    Ayrshire
    @Fireexit1 you’re right about the number of pumps and that’s actually the amount it had. Made a typo 15 should read 45.
    The blue flamelets were yesterday as I checked it and the orange today so maybe different pressures. There was periods of blue flamelets today also but then every 5-6 seconds a large ball of orange flame as seen in the last picture would erupt from the nozzle.
     
  6. Fireexit1 United Kingdom

    Offline
    Joined:
    Jun 13, 2020
    Messages:
    3,525
    Location:
    Brighton UK
    Unless it is "pulsing" I would suspect carbon shuttling up and down the vapouriser. I have found the bicycle brake cable trick helpful in clearing them out. Also make sure your tank is clean inside and your paraffin is filtered. I picked up a Hipolito automatic once and it actually had fine gravel in the tank...
    Also when you move the control wheel can you see the needle pop out of the top of the jet ?
     
  7. stuartc

    stuartc United Kingdom Subscriber

    Offline
    Joined:
    Feb 9, 2021
    Messages:
    105
    Location:
    Ayrshire
    Tank is clean, paraffin has been filtered and I’ve took the vaporiser apart and had a wire in without really seeing any debris.
    The needle pops through the jet fine.
    The lamp ran pretty well last night for a short period with the only issue the slight flaming outside the mantle and a small leak from the control wheel region.
    The issue with the flaring started today after checking the lamp over and tightening up the connections and seems to be getting worse the more times I try it
     
  8. Sellig33

    Sellig33 France Subscriber

    Offline
    Joined:
    May 15, 2017
    Messages:
    1,050
    Location:
    Gujan-Mestras - Gironde - France
    @stuartc , did you put the wire in the loop ?
    Carbon is also deposited in the loop, and the orange flame is typical of this phenomenon.
     
  9. stuartc

    stuartc United Kingdom Subscriber

    Offline
    Joined:
    Feb 9, 2021
    Messages:
    105
    Location:
    Ayrshire
    Hello @Sellig33 . Yes I had a wire right round the loop and could feel no restrictions nor did I see any deposits come out :-k
     
  10. Rickylee United Kingdom

    Offline
    Joined:
    Nov 16, 2020
    Messages:
    90
    Location:
    Chesterfield
    Seems like its over fuelling, enlarged jet in my opinion. :thumbup: :).
     
  11. Fireexit1 United Kingdom

    Offline
    Joined:
    Jun 13, 2020
    Messages:
    3,525
    Location:
    Brighton UK
    My last thought is "back burn" where the J tube might be seen to glow after a while. Otherwise I am afraid it does rather sound like a new jet could bring results

    Chris
     
  12. stuartc

    stuartc United Kingdom Subscriber

    Offline
    Joined:
    Feb 9, 2021
    Messages:
    105
    Location:
    Ayrshire
    @Rickylee @Fireexit1 thanks guys everything else seems ok so a new jet is the next logical step. The J tube did change colour but I think this was only as expected due to the heat. I wouldn’t say at any point I thought it was glowing red
     
  13. Rickylee United Kingdom

    Offline
    Joined:
    Nov 16, 2020
    Messages:
    90
    Location:
    Chesterfield
    @stuartc don't suppose you've got a spare globe knocking about for one of these have you? (Probably already know the answer but still worth an ask lol). Cheers.
     
  14. stuartc

    stuartc United Kingdom Subscriber

    Offline
    Joined:
    Feb 9, 2021
    Messages:
    105
    Location:
    Ayrshire
    Sorry @Rickylee I’m afraid I don’t. Hopefully you’ll find one soon :thumbup:
     
  15. Rickylee United Kingdom

    Offline
    Joined:
    Nov 16, 2020
    Messages:
    90
    Location:
    Chesterfield
    Aahh no problem @stuartc was worth an ask anyway. Thanks.
     

Share This Page