I know of several of the 5000 series tractors that have had this problem. I think the switch advances the timing slightly when cold to help with emissions and it may make it run smoother while warming up. In NC I don't think it will cause you any problems. In fact I doubt that it would cause any major issues in any climate; might just smoke a little more when cold.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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