La Maddalena
New Member
- Dec 16, 2009
- 266
- Boat Info
- 2004 420 Sundancer w blue hull and hardtop
- Engines
- twin Cummins 6CTA 8.3 M3 and ZH Hurth V drives
We took the boat out today for our first "solo" cruise (w/o broker/instructor) around Elliott Bay and Puget Sound. Gray overcast day, 45 degrees, light sprinkles - typical Seattle weather (January through June :lol. Lots of flotsom in the water - large logs, branches, chunks of wood, etc. All was well, we circumnavigated Bainbridge Island cruising at about 3000 RPM. On the return back to the marina, about 15 minutes out, I noticed a strong vibration in the boat. At first I thought it was becasue I had been adjusting the throttles up and down, and I just wasn't in a good cruise speed sweet spot. But when I slowed down and sped back up to 3000 RPM again the vibration was unchanged throughout the range of RPMs. Next I went into idle and tried each throttle individually. The port engine/prop was fine and smooth, the starboard engine/prop had the vibration.
Thoughts? It feels like the prop or shaft is unbalanced, causing the vibration. My immediate thought was that although I was very careful and didn't feel or hear the boat hit anything, that we hit a submerged log with the starboard prop or shaft causing some damage to one or the other. Second thought is that something (line) is wrapped around the shaft. Would appreciate any insights. I will contact our local Sea Ray service department tomorrow.
Thoughts? It feels like the prop or shaft is unbalanced, causing the vibration. My immediate thought was that although I was very careful and didn't feel or hear the boat hit anything, that we hit a submerged log with the starboard prop or shaft causing some damage to one or the other. Second thought is that something (line) is wrapped around the shaft. Would appreciate any insights. I will contact our local Sea Ray service department tomorrow.