curthertel
Member
- Messages
- 2
- Reaction score
- 1
- Points
- 10
- Boat Make
- Other
- Year
- 2025
- Boat Model
- Other
- Boat Length
- 21
I just took delivery on a new Weldbilt 20/70 set up for a jet. I installed a 2018 150hp mercury 4 stroke (105hours) and installed a new jet pump on the motor. I have had this boat out 4 times. The first 2 times with one person in the boat the motor vibrated violently but in seconds got up on plane, vibration gone. Operated the boat for couple hours with no problems. The third time out I was alone vibration would not go away, idled back to trailer, contacted jet pump supplier and he said lower motor 1/4." Lowered motor and 4 trip out with 2 people in boat same vibration. Once again vibration went away and we boated for several hours with no problem. Incidentally, while vibrating, motor alarm is going off. I tried to attach a video, no luck.