I lost the instructions for the Woods outdoor timer #49640 E151740 TM305

You can get the manual on the link below.

http://waterheatertimer.org/pdf/Woods-49122-N1506-manual.pdf

See link below to double check your timer ID
http://waterheatertimer.org/Woods-timers-and-manuals.html#N1502

N1502 manual:
http://waterheatertimer.org/pdf/Woods-N1502-manual-english.pdf

Link show all Woods timers and manuals.
Noma is one name used to market Woods timers
Woods N1507 is also 49565
ttp://waterheatertimer.org/Woods-timers-and-manuals.html

Woods N1507 manual
http://waterheatertimer.org/pdf/N1507-programmable-outdoor-timer-manual.pdf

Add a comment if this manual does not match your timer.

Woods brands sells timers that are packaged and sold under various names and numbers.
For example GE sells same yard stake under their brand.

Woods 6-outlet yard stake manual:
Add a comment and say if this is your timer manual.
http://waterheatertimer.org/pdf/GE-15107-outdoor-timer-manual.pdf

That sounds like the Woods 17321 Dusk-to-Dawn yard stake
Product image:
http://www.amazon.com/Woods-17321-Outdoor-3-Outlets-6-Foot/dp/B000BHN4H8

Manual
http://waterheatertimer.org/pdf/Woods-17321.pdf

If this is not your timer, check following page:
http://waterheatertimer.org/Woods-timers-and-manuals.html

Instructions:
Yard stake control outlets, and turns ON automatically at Dusk
Rotate dial to set options:
Rotate to OFF > outlets OFF
Rotate to ON > outlets ON
Rotate to Dusk-dawn > outlets on at dusk and off at dawn
Rotate to 2 4 6 8 > outlets on at dusk and off 2 4 6 8 hours later

Woods 49565 is also N1507 timer
http://waterheatertimer.org/pdf/Woods-49565-manual.pdf

If this is nor your timer, see all woods timers and manuals:
http://waterheatertimer.org/Woods-timers-and-manuals.html

Noma is Woods timers.
See all Woods timers and manuals
http://waterheatertimer.org/Woods-timers-and-manuals.html
Add a comment any time

Your timer could be Woods/Noma N1502
http://waterheatertimer.org/pdf/Woods-N1502-manual-english.pdf
Coleman 2001
http://waterheatertimer.org/pdf/Woods-2001-49647.pdf
Woods 13660
http://waterheatertimer.org/pdf/Woods-13660.pdf
Woods 59730 yard stake:
http://waterheatertimer.org/pdf/GE-15107-outdoor-timer-manual.pdf
Coleman/Woods 13547 yard stake
http://waterheatertimer.org/pdf/Woods-13547.pdf

You posted under Woods 59204 outdoor timer.
If this is not your timer, add a comment.
http://waterheatertimer.org/Woods-timers-and-manuals.html

manual for Woods 59204 timer
http://waterheatertimer.org/pdf/Woods-59204.pdf

Instructions:
Rotate dial until current time lines up with arrow.
48 segments (or pins) located around edge of dial > each segment is 1/2 hour
Set ON-off times by pushing pins in or out
Pins pushed out = timer ON
Pins pushed inward = timer OFF
Plug in timer.

Maximum 1250 Watts.
50 mini-bulb strand of Christmas lights is 25 Watts.
Timer will operate 50 strands of 50 mini-bulbs.
Long-winded guide for Christmas light wattage:
http://www.christmaslightsetc.com/pages/how-much-power.htm

Westek TE06WHB timer
Utilitec TE06WHB timer
Woods 59377 are identical timers
http://waterheatertimer.org/Woods-timers-and-manuals.html#59377

Woods 59377 manual
http://waterheatertimer.org/pdf/Woods-59377.pdf

Written instructions:
http://waterheatertimer.org/How-to-program-Utilitec-0155671.html