My m18 used to take 10 seconds of glowing to start cold, and would restart without glowing when being restarted after a 2-3 hour sail. As the boat was 15 years old when I got it, I decided to have the injectors checked by the Universal distributor, Hansen's Marine, in Marblehead, MA.Since then, it has to be glowed for 15 sec. to start cold, and 3-4 sec. after sailing.This sounds like things are worse. The owner's manual says that the engine needs 30 seconds cold, assuming spring/summer temps.Any thoughts?