What is the new starting sequence for units with Tier 2 Yanmar engines?

The starting sequence for units equipped with Tier 2 Yanmar engines is designed with specific temperature thresholds in mind to ensure optimal engine performance and reliability. In this context, when the engine temperature is above 20°F, it is critical to facilitate a proper preheating period before cranking the engine.

The correct response specifies that at temperatures warmer than 20°F, the engine should undergo a preheat for 20-30 seconds, followed by a cranking period limited to 15 seconds. This approach balances the need for an initial warm-up period while preventing potential over-cranking, which can lead to battery drain and starter motor wear.

This method is aimed at ensuring that the engine starts efficiently while also considering the mechanical limits and requirements for starting an internal combustion engine under varying temperature conditions. The allowance for a second start attempt highlights the consideration for situations where the first attempt might not engage the engine successfully, ensuring that operators have the opportunity to start the engine without risking damage to the starter system.

Overall, this starting sequence reflects a careful balance of preheating and cranking time, tailored to support reliable startup performance in colder conditions specific to Tier 2 Yanmar engines.