[header] How to replace the cutter blade in a foodsaver machine [title] Open the cover and locate the blade assembly from underneath. [title] Insert a small screwdriver or dull table knife under the retaining tab of the blade holder while gently pulling on the blade cartridge. [title] Be careful not to loose the small spring on the blade assembly. 
[step] These pictures show the retaining tab and the notch on the blade cartridge that it snaps over. [title] Find the similar retaining tab on the blade cartridge.