As you can tell from my sudden surge in posts, I'm trying to make good use of the off season by working on my boat.
I never needed to use the Wallas 2400 heater this summer, but I tried to start it a few weeks back without success. It puffs some smoke out the exhaust for about 2-1/2 to 3 minutes, and then shifts into another mode as evidenced by the fan speed changing and the fuel pump decreases its pump rate by half.
I talked with a friend who uses a kerosene heater in his garage (a wick type), and his advise match my thoughts about what was wrong. The kerosene tank was only about half full, and the fuel was not completely clear. My guess is the previous owner left the fuel in there for a good while before I bought the boat this Spring. I removed the fuel, cleaned the tank, let the fuel line and fuel return line drain, but I couldn't get into the heater very easily to do any more. My hope was fresh kerosene would fire it up, but the symptoms didn't change. She reliably seems to try and ignite, but I still only get a little less than three minutes of smoke exhaust and the red pilot light never lights up on the control panels.