used to start right away and run all day no problem, then one day, it will not start via the starter, though I can get the motor started manually with the pull cord. Tried the starter and nada, does not even spin or no audible click. I know the battery is on the weak side. Could it be due to weak battery? I read somewhere that you could jump the starter to see if it still functioning. What to look for? The motor is mid 90s. thanks!