Follow up on Engine Dieseling

[craig newton]

Following the list of suggestions for getting rid of the engine dieseling problem I've had. First thing I checked was the timing and it was advanced. I have clear hoses going to and leaving my thermostat. I shut down before fixing the timing because there was no water showing in the hoses. I'm going to change the impeller first which was also a suggestion. Another one was to check my plugs. I replaced the plugs six months ago with the ones recommended in the manual and remembered the dieseling started shortly after that. I attached a picture of the four easiest to get at. They don't look fouled but I don't know what they should look like if they are too hot. Please look at them and tell me what you think.