1974 Gilson Lawn Tractor Issues

[TractorStumped]

I am a new owner of a Gilson Lawn Tractor and up until recently it ran great. The issue I am having is that it will not start or even try to start. I turn the key and the starter engages but thats as far as it goes. I was wondering if I might have a bad safety switch that is keeping it from starting or if the engine just ceased up? What happened was that it started fine as usual and I drove it to the back yard to start cutting the grass when I turned the blades on it sounded like they were not running with as much power as usual so I shut it off to investigate. I found nothing wrong or obstructing them so I went to try to restart the engine and nothing, just a click and nothing. So I replaced the solenoid and starter and still have the same issues. Any help would be appreciated thanks