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Old 06-01-2022, 07:50   #1
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Flexible Coupler

Hello:

I just put a new engine in my boat. Works great. I was thinking about putting a flexible coupler in. I had a bunch of people saying that they were good. I also had a couple people saying that they werenít.

Whatís the consensus on this issue? The boat is out of the water now and Iím thinking of doing it unless thereís a reason not to.

Thanks.

Michael
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Old 06-01-2022, 08:49   #2
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Re: Flexible Coupler

Flexible couplers absorb the minor vibrations that come with hull flexing and mount flexing. They can pick up small vibrations from the prop as well, deadening them before that can be transmitted to the boat.They can reduce felt vibrations when the engine is chugging along. They are not a remedy to not aligning the engine and the shaft properly in the first place, or worn out engine mounts. So, yeah. I use both a flexible mount and a soft (relatively speaking) thrust plate between the engine and the tranny. I don't know of a down side if you did the alignment properly.
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Old 06-01-2022, 10:04   #3
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Re: Flexible Coupler

We had this conversation within the last month. El Searcho.
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Old 06-01-2022, 10:19   #4
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Re: Flexible Coupler

I think the only real downside is where owners use them to make up for poor alignment or worn mounts as noted above. There can be issues with bonding (if bonded) and not properly installed but very rare. All other arguments against seem to have no merit.
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Old 06-01-2022, 17:19   #5
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Re: Flexible Coupler

Thanks!

Michael
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Old 16-01-2022, 17:40   #6
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Re: Flexible Coupler

Checkout a Sigmadrive if alignment is an issue
https://store.kingpropulsion.com/pro...gmadrive-sd55/
https://youtu.be/tKvDYpJaaAY
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