What kind of oil do you put in a yanmar 1600 transmission?

For a Yanmar 1600 transmission, you typically use a high-quality gear oil, such as SAE 90 or 80W-90, depending on the specific model and operating conditions. It's essential to check the owner's manual or manufacturer's recommendations for the exact specifications and any particular requirements. Additionally, ensure the oil is suitable for the transmission type to maintain optimal performance and longevity.