Switching brands of plugs will do little , it is all about type and heat range of plugs. I always use champion, have for 55 years. A little lube on the tip of that needle valve may well solve your problem. A viton tip will always hold better than steel with less pressure from float. That is why they changed to them. IH 4 and 560's with their larger fuel tanks put a little more pressure on the needle valve than previous models and all the carbs leaked brand new so IH went to viton tip. Problem with the new one is quality control. The hole in seat is often times oblong and needs to be coined to work well. Does ethanol affect them,possibly as I have found that it will harden the rubber hoses used on fuel lines in a year or two of use.
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Today's Featured Article - Tuning Up Your Tractor: The Battery - by Curtis Von Fange. Buried somewhere beneath the sheetmetal, under the gas tank, or stuffed in front of the radiator is the battery. This elusive and neglected component of the tractor is the hardest to get to when it is dead and in need of a jump. But usually, the storage battery is a storehouse of electrical energy waiting to be released a the flick of a switch. A few maintenance tips and periodic cleaning will keep it charged for the duration of its life span. The battery is made up of a number of lead bas
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