Alright tryed adjusting the carb. Still ran the same. But noticed that you are correct about the 1/4 throttle shut down. So that will be next. Check the main jet. Now this carb came came off a running 60 but I guess we coulda sucked something up. Thank you for your inputs. It's greatly appreciated!
1951 John Deere B with a jd 50 power block
- Thread starter Daveb50
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buickanddeere
Super Member
That makes a difference. You didn't mention sooty plugs initially.
Running 3116 autolites and solid core wires? Coolant temps 180-195F. The only problem could be shorting out plugs due to fouling , caused by incomplete combustion.
What fuel octane and timing to compensate for the power-bloc's much higher compression.
Soundguy
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you need to trace the problems and work on them.
black sooty plugs will either be too much fuel, or incomplete combustion from weak spark... or a vacume leak causing you to need too much choke or extra fuel to keep the mix rich enough to run. I could see a flood condition causing this, and make her fall on her face when given the order for more butterfly from the gov..
black sooty plugs will either be too much fuel, or incomplete combustion from weak spark... or a vacume leak causing you to need too much choke or extra fuel to keep the mix rich enough to run. I could see a flood condition causing this, and make her fall on her face when given the order for more butterfly from the gov..
Ok so not sure how I'm not tracing or working on them. So tonight we will start with a hotter champion b23 plug with our fuel air mixture set at 1 1/4 turns and see how it works. Last night we had it back firing thru the carb. She runs at idle jus fine until you give the butterfly a turn near 1/4 throttle and then she falls off and the plug near the fly wheel is really bad soot and the other is black but not as bad
Soundguy
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- Central florida
- Tractor
- RK 55HC,ym1700, NH7610S, Ford 8N, 2N, NAA, 660, 850 x2, 541, 950, 941D, 951, 2000, 3000, 4000, 4600, 5000, 740, IH 'C' 'H', CUB, John Deere 'B', allis 'G', case VAC
just for kicks.. have you comp tested her?
bad valves COULD possibly cause some of this...
bad valves COULD possibly cause some of this...