If you want your start-up to really make it, founders will still be on the hook even after hiring an outside CEO.The new CEO may not understand the domain as well, be more operational than strategic, and may not see the future the same way as the founders.If founders check out or leave after bringing in an outside CEO, it can seriously damage the value of their equity.Founders should only bring in an outside CEO if it increases their equity value and makes the company worth even more.