graybird78
Seaman Apprentice
- Joined
- Aug 14, 2016
- Messages
- 38
my 90hp us marine,has bad exhaust leak when in water. the smoke seems to be coming from underneath the carbs around the shifter rod. took it to boat mechanic to have looked at. found that there was some horse shoe looking exhaust seal in lower unit that was missing. but he doesnt think that the missing seal is the culprit. says doesnt see how that smoke can get up to the motor. parts diagrams call it exhaust seal. could some explain this.