I
Ivan Edwards
My First 285 has a Volvo 18hp, 2 cyl, Model 2002.There is a small vibration in the boat at cruising throttle (5 - 6 knots), and it comes and goes depending on the rocking of the boat in waves.I have checked propeller shaft for bend, done engine alignment, replaced the cutlas bearing,and assured that the motor mounts are secure.I am guessing that the sway of the motor is causing enough mis-alignment to cause the vibration, and tomake it come and go. Should I replace the motor mounts?What about one of these flexible couplings between the engine and the drive shaft? Are they a good idea? Might fix the vibration?