I was excited to see my tractor books arrive on Friday, ordered from this site. They were sent really quick, bad part was that they sent the wrong service books, ones for 806 and similar. I did get op manual though. Looking through section on starting tractor, said to hold glow plug button for about 30 seconds then to continue holding glow plug button while pressing start button, and continue using glow plugs until smoke clears up. I have run other tractors with glow plugs but did not realize you were supposed keep using the glow plug while starter is operating. Is that unique to IH or common practice with all tractors using glow plugs?