Roland I don't know about the vibration affect on the coils and heat is never a good thing in any environment. But I mow all summer with my 1450 and it is always 100 plus degrees and the coil is the one that came with the 16 hp engine I put in the 1450 8 or 10 years ago. I have the Point saver on the engine and I blow the entire tractor clean every night before I put the tractor in the garage.
My neighbor has a 1450 I rebuilt several years ago and then he made me sell it to him. He mows all summer in the heat of the day like I do and as far as I know it has the original coil. If it failed I would have to replace it for him, you know how it goes when you sell to a neighbor or a relative.
Years ago I had some problems with coils on some of my Cubs that were not used as hard as this 1450. I was buying those coils from NAPA and they had the built in resistor. I finally bought 3 coils from Madsons and replaced the bad one I had at that time and put the two spares on the shelf where they sit today with cobwebbs on them. Maybe the trick is to always have a spare.
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