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  1. #1
    New Member Daveb50's Avatar
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    Default 1951 John Deere B with a jd 50 power block

    Looking for any help that may be out there. We put a jd 50 power block into our b this summer. Now we are trying to get the bugs worked out. We have an issue with it cutting out. The governer asks for more fuel and the tractor falls on its face. Tryed adjusting the linkages and nothing seems to help. Last night I removed the linkage from the side of carb. Started the tractor and by hand opened up the butterfly on the carb. Didn't even reach half way open and it fell off. Any idea?

  2. #2
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    Default Re: 1951 John Deere B with a jd 50 power block

    Leaning out due to extra airflow.

  3. #3
    New Member Daveb50's Avatar
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    Default Re: 1951 John Deere B with a jd 50 power block

    So you think it has to much air? The spark plugs are black sewty looking

  4. #4
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    Default

    Quote Originally Posted by Daveb50
    So you think it has to much air? The spark plugs are black sewty looking
    Defiatly not the correct mixture. They should be a beigh color. The black junk on the plug is reffered to as a fowled plug.

  5. #5
    New Member Daveb50's Avatar
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    Default Re: 1951 John Deere B with a jd 50 power block

    Ok thank you. I know it has two screws on each side of the double barrel carb. So I will try to get the mixture right. Thanks again

  6. #6
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    Default Re: 1951 John Deere B with a jd 50 power block

    Quote Originally Posted by Daveb50 View Post
    Ok thank you. I know it has two screws on each side of the double barrel carb. So I will try to get the mixture right. Thanks again
    Do you have a manual with the initial adjustments on the carb?

  7. #7
    New Member Daveb50's Avatar
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    Default Re: 1951 John Deere B with a jd 50 power block

    Well it's a jd 60 carb. I believe the manual says 1 1/4 turns for a 50 and 2 1/2 turns for a 60

  8. #8
    New Member Daveb50's Avatar
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    Default Re: 1951 John Deere B with a jd 50 power block

    But in my thinking I believe that it should be less than 1 1/4 turn. Because the carb is jetted for a 60. The reason we are using this carb is we were told we needed it for more fuel for the power block. Any ideas?

  9. #9
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    Default Re: 1951 John Deere B with a jd 50 power block

    Quote Originally Posted by Daveb50 View Post
    But in my thinking I believe that it should be less than 1 1/4 turn. Because the carb is jetted for a 60. The reason we are using this carb is we were told we needed it for more fuel for the power block. Any ideas?
    With the carb for the 60 it will be jetted bigger. This is allowing the fuel that would go into the bigger engine on the 60 to go into the one on the 50 flooding it and causing your problem. With the carb set properly it will work. If it idles fine to about 1/4 throttle then dies when revved higher it is most likely the main jet that is plugged. Also check your choke that is is not disconnected leaving the buttery valve to float freely.

  10. #10
    Epic Contributor Soundguy's Avatar
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    Default Re: 1951 John Deere B with a jd 50 power block

    i agree with mike r.. especially after hearing about the plugs.

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