I broke out my Coleman Powermate 5KW generator today and serviced it. It's been since last winter since I last ran it and it started on the first pull. After letting the engine warm up I changed the oil and added a qt of fresh gas along with some Sta Bil. Then ran the unit for 1/2 Hr and powered up two 1500 watt heaters. All worked well, then let the engine die down by stopping the fuel supply. Hopefully I won't need it but you never know.