fan delay on make timer to help start up for ac generator

When I did mine I had some trouble finding a 12 volt relay. I think I found it at Allied electronics on-line. I had to add a resistor for the appropriate time-delay.

I had read about the mod on-line. It was a very good write up with instructions and links to a source for a cheaper relay. But at that time the cheaper relay was no-longer available.

For the life of me, I can't find that detailed write up again.