Trapper Hunter:

"When is a good time to hunt a funnel?"

Basically, a funnel depends upon the deer moving. Deer tend to move between feeding areas and bedding areas in the morning and from bedding areas to feeding areas at night. Your funnel will be most productive at those times, would be my guess. Then again, sometimes deer move at mid-day to get water, and a funnel associated with an approach to water may be productive mid-day. During the rut, bucks may be moving -- and pushing does by consequence -- at pretty random times.

If you are in an area with significant hunter pressure, hunter movement may stimulate deer movement outside of these hours. For example, if hunters tend to be on stand from 6 AM to 9 AM and from 3 PM to dark, you might stay on stand until 10:30 and get on stand early at 2 PM to benefit from hunter induced deer movement. Just a theory, I don't have any personal experience with this.