Posted by FBH44 on June 03, 2014 at 07:32:36 from (64.85.214.232):
In Reply to: 806 gas spark plugs posted by lee little on June 02, 2014 at 19:26:39:
One time Autolite sent me a spark plug catalog. Here"s the info on heat ranges;
2014 Autolite Spark Plug catalog Heat Range Chart page 4-5 18MM thread size 1/2” reach 7/8” hex HOT rating 388 Standard resistor plug 3116 ‘Power-Tip’ Non-Resistor plug 386 Standard resistor plug -- gap -- -- gap -- 373 Standard Non-Resistor plug COLD rating
Each step up = 70º – 120º increase in spark plug tip temperature. Self-cleaning zone = 500°C to 850°C tip temperature. IF TOO HOT = Possible severe engine damage, pre-ignition, detonation with racing / high performance engines. . IF TOO COLD = Possible fouling, possible mis-firing, but no engine damage.
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Today's Featured Article - Product Review: Lead Substitutes - by Mike Schordine. Lead was oriinally added to gasoline as an upper cylinder lubricant. It lubes the valves and seats. If you rebuild the motor, you could use hardened seats and valves, and unleaded fuel. But if your old tractor runs good, a simple lead substitute added to the gas is a perfectly reasonable solution. And, if you are like me, your tractor is under cover, but it sits outside. So with every temperature change, the humidity in the air collects in the fuel tank, in the form of water.
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