Clunking in prop shaft at low RPM

[Burnut]

Has anyone experienced a loud clunking in the prop shaft at low RPM. When adding just a little power it goes away and runs great. We greased the zerk fittings and that helped a little bit but it came back.

The boat is a Carver 36 gas engines.

[Viper]

Wonder if the prop nuts loosened off and the prop is loose.

[bud37]

QR_BBPOST Has anyone experienced a loud clunking in the prop shaft at low RPM. When adding just a little power it goes away and runs great. We greased the zerk fittings and that helped a little bit but it came back.

The boat is a Carver 36 gas engines.

Welcome to the forum.... Th following is me assuming you have the remote v drive set up in your boat......

Is the noise coming from the joint that is between the engine and the v drive case, or the shaft from the v drive case to the prop. Check for slop/play in the joint/ shafts.

Is there grease and residue around the area of that joint ?

[mjk1040]

Rough engine idle will give you transmission noise and rattle.