Yes it is! The timing chain is located below the powerhead where it runs in a continual oil bath for dependable and quiet operation. With Suzuki's exclusive automatic hydraulic chain tensioner, you can focus on boating and having a good time. (DF40, 50, 60, 70, 90, 115, 140, 150, 175, 200, 225, 250, 250SS, 300). Back to Maintenance.