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Farmall & IHC Tractors Discussion Forum
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Re: Farmall 300 Carb

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Janicholson

11-07-2012 20:06:29
96.24.99.126



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Bottom screw front Load mixture adjustment 3 to 4 turns out from light seating. idle screw (left top about 1/3 to 1/2 way in (not critical at startup) idle mixture screw 3 turns out (or so)
After start, the idle mixture screw is adjusted for best speed then speed for 500rpm or so, then idle mix again, then speed. Power mixture should be set so (if warm) it goes from idle to full throttle in neutral without stumbling, and with very minimal black smoke or none. when pulling loads, it might be 1/2 to one turn out from there to allow full power. Jim

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Sparky2

11-08-2012 09:59:14
96.35.129.251



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 Re: Farmall 300 Carb in reply to Janicholson, 11-07-2012 20:06:29  
Jim, I slipped up, I disconnected the govenor without noting how it fits in the front of the carb. Does the metal peg that extends out from the govenor fit in the small slot of the piece that controls engine speed,,,hope I stated that clearly



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Janicholson

11-08-2012 11:36:15
199.17.6.160



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 Re: Farmall 300 Carb in reply to Sparky2, 11-08-2012 09:59:14  
The tang goes in the slot. it is not impossible to do, but is finikey. Be careful as it goes together (use a good light) and it will be fine. Jim



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Sparky2s

11-08-2012 11:47:10
96.35.129.251



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 Re: Farmall 300 Carb in reply to Janicholson, 11-08-2012 11:36:15  
Thats the term I was struggling with, Tang.

Thanks she is running



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Janicholson

11-08-2012 13:35:55
199.17.6.160



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 Re: Farmall 300 Carb in reply to Sparky2s, 11-08-2012 11:47:10  
Very good. Jim



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Sparky2

11-08-2012 08:19:58
96.35.129.251



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 Re: Farmall 300 Carb in reply to Janicholson, 11-07-2012 20:06:29  
Thanks Jim, done and now I will install. One more please, where do you find that info? Thanks



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CNKS

11-08-2012 09:57:17
216.144.104.128



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 Re: Farmall 300 Carb in reply to Sparky2, 11-08-2012 08:19:58  
The info is in the operators manual. But, you need to remember that the Super H and Super M up changed their carburaters. The starting point for the main jet screw is 5 turns out, it can be turned in for lighter loads if you don't need full power. The carb is supposed to be set as lean as possible and still pull the load that you want it to. You do not want black smoke, and due to the design I doubt if you can get it. Jim is correct that you want to be able to pull the throttle back without stumbling, but my experience says that it will not pull any thing with the leanest setting you can get, in fact my Super H will not even go up a slight incline pulling nothing set like that. So, you will have to experiment. Instead of starting with about 3 turns out and increasing the mixture a half turn at a time, I start with 5 turns out and go a half turn in until it loses power.

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Sparky2

11-08-2012 11:45:05
96.35.129.251



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 Re: Farmall 300 Carb in reply to CNKS, 11-08-2012 09:57:17  
Thanks Gents, I figured out how the governor connects and all is running well, I am getting some black smoke when I give it throttle, so I guess I need to adjust the needle at the front. thanks again



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Sparky2s

11-08-2012 10:01:21
96.35.129.251



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 Re: Farmall 300 Carb in reply to CNKS, 11-08-2012 09:57:17  
Thanks, did you see my note and the govenor connection? Kinda stuck right now



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