I just bought a 48 1 Ton with a stock Inline 6. The engine starts right up once you hit the starter pedal (12v) and it will idle with no problem (upwards of 15 minutes before I shut it off). What type of up keep do I need to perform to keep it running well? A full engine rebuild is in the future, but right now I want to have the opportunity to drive around a little while the weather is nice.