Where do you fill oil on your 1100 stx jet ski?

To fill oil on your 1100 STX jet ski, locate the oil fill cap, which is usually found on the top of the engine compartment. Remove the cap and use a funnel to pour in the appropriate type and amount of oil, as specified in your owner's manual. After filling, replace the cap securely and check the oil level using the dipstick to ensure it's within the recommended range. Always consult your manual for specific guidelines and oil type.