[Richard and Rhonda]

Possibly a new solenoid will help, but the real culprit as Brad said is the low voltage.

If you start tinkering with the solenoid, read the manual carefully. Why, cause my first instinct was wrong. Homey was thinking that if the solenoid is not opening the fuel shut off valve to shorten the rod between the solenoid and the shut off lever. WRONG !! If you do that the solenoid does not have enough stroke to latch. The manual says you should have about 1/8 excess stroke to allow the solenoid to latch.

I would check my wiring connections to the solenoid, and possibly the relay that controls the solenoid as additional problem areas where you could have a voltage drop.