Im fighting a problem.

I have a item with an option, the option also sells by itself. When a customer orders an item and picks that option, the item stock isnt changed. Which is causing shortages in the individual product.

Is there a way to link the option so it pulls the item from the stock?

Here is an example.
"winds/rpm" option is fine
"water jacket" option is the we have always struggled with.
https://www.offshoreelectrics.com/proddetail.php?prod=leo-4074-X2