thats about what i am getting maybe a little longer but i have high hours thanksThe sticker in my 453 says from 50-70F needs a 5 second glow.
As the engine gets more hours on it you may need to glow anytime the engine is cold and may need more glow time.
The 743 plugs are a little slow to warm up. Its not un-common for me to do 15-20 second glows, it fires right up then, if its not quite long enough it has to crank a bit longer.thats about what i am getting maybe a little longer but i have high hours thanks