I bought the gate spring at Home Depot and followed the instructions which are very straightforward. First I had to clean all the spider webs and kill some really big spiders, this is a gate we don't use so all the spiders in the neighborhood are squatting in here.
Once the area was clean, I marked the holes with a pencil using the spring as a template, then drilled four 7/64 holes. To finish the installation, I screwed the spring to both the jam and door, like this:
|Screwing the gate spring|
Once finished, one can adjust the tension by screwing the nut in the top of the spring:
|Adjusting spring tension|
Once adjusted, the door stays closed all the time. Nice improvement for $10.
|Final look of spring from inside|
The spring is on the inside so it does not compromise the house's curb appeal. Actually I might buy another one for the other gate on the left side.