Sv, raise the window and put the carb end of the vacum advance hose in your mouth. You might need to use a longer hose, suck on the hose and put your tounge over the end. Does it hold vacum? If not the vacum advance diaphragm is punctured,cracked, busted, bad. If it holds vacum you will see the breaker plate move clockwise when you remove your tongue. Make sure you are getting vacum from the carb. That truck probably uses ported vacum for the advance.(only has vacum when throttle is partly open). Many fords used manifold vacum for the advance(vacum at idle and open throttle). Either way is ok. The vacum advance will only help mileage. Will not give more power. Sounds like centrifugal advance is working. The vacum advance is easy to replace, two screws into breaker plate. Ps don't go to hot on the plugs,some times causes a no load miss.
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Today's Featured Article - Ford N-Series Transmission/Hydraulic Fluid - The Full Story - by Llamas. The transmission fluid in an “N”:-series tractor lubricates the transmission, differential, rear wheel bearings, PTO and hydraulic pump drive, and it also cats as the working fluid for the hydraulic lift. In 9N/2N models, it also lubricates the steering sector and shaft system. The owner’s manual for the 9N and 2N models specified the use of only two fluids. They were STRAIGHT MINERAL OIL SAE 90 (above freezing) and
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