Yamahas don’t have carbon ring the sea-doo’s have the carbon rings I believe it’s certain models but yeah Yamaha never used those the problem with those with the sea- doo models that have them you can only run the ski with the hose only for 2- 3 seconds okay not minutes okay seconds were talking about hear that’s all on those with that carbon ring I think it was a horrible thought process they came up with but anyways hope this info helps good luck😁👍