My YM2000 is the same. No Glow plug, Thermostart fuel cup or Block Heater and stays outside. At 55Deg.it fires right up. Mid to low 40's It doesn't come right to life. I have a way to get fuel to my Thermostart and if I hook it up starts like a warm summer day in the 40's. I went out the other day and started it. It hit as soon as the Decompression was released but took a bit to come to life. I just wanted to put a good charge on the battery. At only 550 CCA. I'm amazed it lasted this many Yrs.... But I'm in Ga. and feel there would be no way it would last that long @550 up North. When it does go out Walmart has a 750 CCA that will fit but It's twice as much as their 550 CCA. But it may not fit. IMHO. any battery that last 10+ yrs. I feel you got your moneys worth.