VP Duoprop Grinding Noise Forward & Reverse

[PBskippy]

Yesterday experienced sudden grinding noise when tried to put in forward or reverse. No noise in neutral. Boat had run fine for 30 minutes before noise occurred suddenly as I was maneuvering into position at the bait dock. No smell or smoke that we could tell. Prop was spinning but not getting any propulsion. Sounded like noise coming from transom area. Shut it down and towed back to slip. Entire drive was serviced in June. Checked the cotter pin in the shift cable and it was fine. Any thoughts?

 

[PBskippy]

Boat ran fine for 30 mins yesterday before suddenly heard grinding noise when shifting in to forward or reverse while maneuvering at bait dock. No noise in neutral. Prop appeared to spin when in gear but no propulsion. No smell or smoke. Shut it down and towed back to slip. Checked the cotter pin on shift lever and it was fine. Drive was serviced in June. Any thoughts?

 

[Scott Danforth]

Could have lost the spline between the upper gearbox and lower. Could have a bad upper gear box.

Pull the boat on the hard and pull the drive

 

[jimmbo]

What kind of Hub system does your prop have? Pressed in rubber slip or one of the removable hubs, solid plastic or rubber/plastic/metal?

 

[PBskippy]

Turned out to be deck plate/engine coupler. R&R engine etc.