Register

If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Results 1 to 9 of 9

  1. #1

    Join Date
    Sep 2007
    Location
    Platteville, WI
    Posts
    8
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    Cox Black Widow

    I have a question about a Cox Black Widow engine. Can I run my regular 4-stroke SIG fuel through it?

    Thanks,

    galesc

  2. #2

    Join Date
    Nov 2002
    Location
    huron s.d.
    Posts
    2,050
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Cox Black Widow

    SIG says the 4-stroke fuel in not to be used in ANY 2-stroke engine. The little fellers like their nitro, 20% or better . Max H.

  3. #3

    Join Date
    Sep 2007
    Location
    Platteville, WI
    Posts
    8
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Cox Black Widow

    My bad, I meant 2-stroke engine fuel. So the Cox engine likes a higher Nitro percentage? I think I have 15%. I also have 20% for my R/C trucks (but that has a lower oil content).

  4. #4
    DavidAgar's Avatar
    Join Date
    Dec 2001
    Location
    Battle Ground, WA
    Posts
    4,795
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Cox Black Widow

    They make fuel that is designed for just 1/2 A engines. For the reed valve engines you need the right lubricate and nitro. I am not sure that 15 per cent will work at all. Good Luck, Dave
    If the screw ain\'t loose then things ain\'t normal.

    Dave Agar
    AMA#97144

  5. #5

    Join Date
    Dec 2001
    Location
    Upplands Vasby, SWEDEN
    Posts
    7,362
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Cox Black Widow

    Hi!
    You can use whatever fuel you like in all COX engines! Even 0% nitro!

    They however function best with more nitro. 15-30% nitro is what I use in my Babe Bee and Tee Dee engines.
    It's also important that you use at least 20% oil in the fuel. I have run several Black Widow engines on 15% all syntetic oil (Motul "Micro"
    and Aerosynt 2 and Aerosave) that i use for my other engines, but these modern synthetic oils is not that good for the old COX engines. They seem to run more reliably (perform better) with 20% Castor oil.

    5x3 is a good prop size or 6x3 for a slower, larger flying model!
    Jan Karlsson - Supplier MVVS Products

  6. #6

    Join Date
    Jun 2005
    Location
    Granger, IN
    Posts
    1,169
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Cox Black Widow

    They run fine on 15%, and they last longer. Best to use a fuel with castor oil. You'll get more power with higher nitro, though. Whatever you do, don't use Cox fuel. It's extremely expensive and you don;t get anything extra for that extra money. I've used Norvel 25%; don't know if it's still made, though, as it's been a couple of years.
    Al Gunn
    Ultra Sport Brotherhood No. 9

  7. #7

    Join Date
    Apr 2003
    Location
    Hemderson, NV
    Posts
    13,207
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Cox Black Widow

    As I recall the little pint cans of fuel we used to buy was 30%?? Not sure these days and TD didn't have the blend on the lable/can. I use my standard 15% nitro 18% oil power master fuel in my 1/2A engines and it works just fine.
    Drinking and driving are illegal, why do bars have parking lots
    Daisy Air Guns, keeping kids off your lawn for 100 years

  8. #8

    Join Date
    Feb 2005
    Location
    Zephyrhills, FL
    Posts
    1,917
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Cox Black Widow

    I've used 10 & 15 % in all my small engines with no problems. As said you may want to be sure you have about 15 - 20 % oil.

    If I remember right the sig fuel in the smaller cans was 25 % nitro. ENJOY !!! RED

  9. #9
    kenh3497's Avatar
    Join Date
    Jan 2010
    Location
    Rockwell, IA
    Posts
    886
    Gallery
    My Gallery
    Models
    My Models
    Ratings
    My Feedback

    RE: Cox Black Widow


    ORIGINAL: Top_Gunn

    Best to use a fuel with castor oil.

    Caster is a must IMO for the ball and socket joint of the con rod. I was thinking 25% nitro was what the Cox fuel was???

    I used to run 65% nitro when I was doing some racing. You had to pre-fit the piston/cylinder first, other wise the piston would stick and or, beat out the ball and socket joint. I had a "special" tool to reset the socket. Got 'em to tight sometimes though[:@]
    Sent from my Dry-Erase-Board


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT -6. The time now is 12:53 AM.

SEO by vBSEO 3.6.1 ©2011, Crawlability, Inc.