Compass1,

Yes, it should have a red-orange glow, not bright yellow or white though. An OS type F is probably your best choice for most 4 cycle glow engines. They will work ok around the range of 1.2 to 1.5 volts. A freshly charged one-cell nicad glow starter will be about 1.25 to 1.3 volts.

Hope that helps.

LarryC