Any experience with Bruntons Sigma Drive?

[Waterant]

Hi guys,

I consider replacing current Globe Drivesaver installed between my shaft coupling and the transmission with R&D drive saver: allows to check/adjust alignment without removing it
or Bruntons Sigma Drive: automatically "fixes" a much greater misalignment and allows the shaft to be slipped inside the coupling if prop hits something.

but i can not find any reviews of using those on a trawler or powerboat. There are a fair number of happy saiboat users but with smaller shafts and engines.
Anybody uses this item or knows somebody who is using it on a trawler or powerboat?

My main reason for replacing is because it's not possible to properly check and adjust the alignment with current Globe Drivesaver.

Any thoughts/comments are appreciated.

Thanks,

Anton
m/v "Dora"

 

[cardude01]

I know this is an old post, but I just installed the SD-100 on my boat today. The install went reasonably well,and I will test it out tomorrow and report back.

Reason I installed it is my boat has had some driveline vibration for awhile that I wanted to address. I also recently lost all but one of the shaft coupler bolts on a long crossing and I needed to address that. I think I might have a slight alignment problem and I’m hoping this clears that up as well. I tried to align the engine but couldn’t seem to get it perfect so that’s why I tried this thing.

Sigmadrive - Bruntons Propellers

 

[Waterant]

Thanks,
please let me know if you notice a difference. It's too late for my old boat but I may need it on a "new" one.

 

[cardude01]

For my boat the difference was like night and day. Super smooth at all RPMs. The boat also seemed quieter, maybe from the reduced vibration?

 

[Waterant]

Super, thanks. Congratulations on the successful upgrade!