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Rochester 2GM

Discussion in 'Early CJ5 and CJ6 Tech' started by Darrell, Oct 2, 2004.

  1. Oct 2, 2004
    Darrell

    Darrell New Member

    Greenwood...
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    Sep 30, 2004
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    I have been looking all over for info on tuning my carburetor. I have the "Dauntless" V6 and am assuming it is the Rochester carb, but it says 2GM. I have seen a lot of info on 2G, 2GC, 2GV, 2GE, but nothing mentioning the 2GM. Any advice is appreciated, even if it is to explain that I am totally confused!
     
    Darrell, Oct 2, 2004
    #1
  2. Oct 2, 2004
    MOP

    MOP Active Member

    Pullman, WA
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    Mine says the same, but the GM stands for General Motors I believe. A rebuild kit includes more than enough parts that work on a 2G, 2GC, 2GV....

    The float level should be 1 5/32", float drop 1 7/8". Do a search on this board for instructions on idle mixture settings.
     
    MOP, Oct 2, 2004
    #2
  3. Oct 2, 2004
    MOP

    MOP Active Member

    Pullman, WA
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    MOP, Oct 2, 2004
    #3
  4. Oct 3, 2004
    Darrell

    Darrell New Member

    Greenwood...
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    Sep 30, 2004
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    That makes sense. Thanks for the info!
     
    Darrell, Oct 3, 2004
    #4
  5. Oct 4, 2004
    zed

    zed Iowa- Gateway to Nebraska

    central iowa
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    Aug 4, 2004
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    745
    i believe that ludel in the jeep owners bible has a decent section on it for the v6 as well as chilton
     
    zed, Oct 4, 2004
    #5
  6. Oct 4, 2004
    66cj5

    66cj5 Jeep with no name

    NorthWest Indiana
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    carb should have a tag on it, or rochester 2g_ cast in the top cover.
     
    66cj5, Oct 4, 2004
    #6
  7. Oct 4, 2004
    AKCJ

    AKCJ Active Member

    Fairbanks, Alaska
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    Aug 12, 2003
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    Was just reading something on this over the weekend.

    I believe the V in 2GV stands for automatic choke that uses a vacuum signal.

    I think it's possible the M in 2GM stands for Manual Choke.
     
    AKCJ, Oct 4, 2004
    #7
  8. Oct 4, 2004
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    sparky, Oct 4, 2004
    #8
  9. Oct 4, 2004
    vanguard

    vanguard

    My head hurts.
















    Good link.
     
    vanguard, Oct 4, 2004
    #9
  10. Oct 4, 2004
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
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    Found that the other day looking for Scout Carb information.
     
    sparky, Oct 4, 2004
    #10
  11. Oct 4, 2004
    66cj5

    66cj5 Jeep with no name

    NorthWest Indiana
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    good info.
     
    66cj5, Oct 4, 2004
    #11
  12. Oct 4, 2004
    MOP

    MOP Active Member

    Pullman, WA
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    Mine actually says Rochester 2, and a little bit (1/4") above it it is stamped GM. It doen't actually say 2GM.... I thought this was what Darrell was observing. Sorry if I was mistaken.
     
    MOP, Oct 4, 2004
    #12
  13. Oct 4, 2004
    Southtowns27

    Southtowns27 Custom Title

    The Backhills of...
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    M for marine? Just another possibility since I've seen 2G's on boats before
     
    Southtowns27, Oct 4, 2004
    #13
  14. Oct 4, 2004
    James P. Enderwies

    James P. Enderwies Sponsor

    Lake Havasu City, AZ
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    Feb 2, 2003
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    Interesting read. Well our 225's definitly have a 2G. BUT, what is the designation for a MANUAL choke? All those refered to were either "hot air" chokes (black thing on side of carb)=2GC, or coil mounted on manifold choke with a vaccum brake=2GV. These were used as the center carb on a Tri-Power and was the same on my old '64 Chevelle.
     
    James P. Enderwies, Oct 4, 2004
    #14
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