Foster Nordic
Veteran Member
- Joined
- Sep 29, 2017
- Messages
- 39
- Location
- United States
- Vessel Name
- Lesser Light
- Vessel Make
- Nordic Tug 32
I know noises are always hard to describe; but here goes....
I have a recently-purchased 2008 Nordic Tug 32 with Volvo D6-280 diesel inboard drive and transmission. 550 hours and excellent service history and records. General condition of the whole boat is pristine.
Here's my issue: The drivetrains purrs like a kitten with a single exception - when slowing from cruising speed ( 8 knots; 1600 RPM) to idle (2 knots, 600 RPM) as the engine and transmission slow down there is a strange noise that comes from the drivetrain that somehow sounds unhealthy - maybe a faint "grinding" sound - only while slowing down. Noise isn't there at cruising speed, and also not there once completely slowed and idling; - also not there while accelerating. Only while decelerating... I didn't notice this nor did the surveyor when purchasing last summer. Maybe I'm just more attuned to everything.
Any ideas what could cause this? I'd love any suggestions what to look at?
thanks all.
Don
I have a recently-purchased 2008 Nordic Tug 32 with Volvo D6-280 diesel inboard drive and transmission. 550 hours and excellent service history and records. General condition of the whole boat is pristine.
Here's my issue: The drivetrains purrs like a kitten with a single exception - when slowing from cruising speed ( 8 knots; 1600 RPM) to idle (2 knots, 600 RPM) as the engine and transmission slow down there is a strange noise that comes from the drivetrain that somehow sounds unhealthy - maybe a faint "grinding" sound - only while slowing down. Noise isn't there at cruising speed, and also not there once completely slowed and idling; - also not there while accelerating. Only while decelerating... I didn't notice this nor did the surveyor when purchasing last summer. Maybe I'm just more attuned to everything.
Any ideas what could cause this? I'd love any suggestions what to look at?
thanks all.
Don