How hot does the water box on a jet ski -yamaha get under normal operation?

Under normal operation, the water box on a Yamaha jet ski can reach temperatures between 140°F to 160°F (60°C to 71°C). This component is designed to cool the exhaust gases before they exit, but the heat generated can cause the water box to become quite hot. It's essential for safety to avoid direct contact with it during or shortly after operation.