Thank you for submitting a question to Manage My Life.
This fuse is a 40 Amp fuse.
Here is a link that you may use to purchase a
40 Amp fuse for your Craftsman model number 917.370691 walk behind mower
If you do not feel confident repairing this problem yourself, then you can have it repaired by a Sears technician. Here is a link that will provide the nearest drop-off locations:
Sears Home Services
I hope this is helpful. If I may be of further assistance please include more details in a reply to this post.