Flexible shaft couplers

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   Does anybody use these flex shaft couplers?

http://www.flexible-coupling.com/r-and-d-flexible-shaft-coupling.html

It's like a flexable cushion between the tranny and the shaft to protect the drive line and reduce vibrations.

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captan1 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: June-02-2004 Location: United States Status: Offline Points: 180	Post Options Post Reply Quote captan1 Report Post Thanks(0) Quote Reply Topic: Flexible shaft couplers Posted: November-28-2005 at 10:09am
	Does anybody use these flex shaft couplers? http://www.flexible-coupling.com/r-and-d-flexible-shaft-coupling.html It's like a flexable cushion between the tranny and the shaft to protect the drive line and reduce vibrations.
	1978 Ski Nautique

mackwrench Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: February-25-2005 Location: Gone Status: Offline Points: 190	Post Options Post Reply Quote mackwrench Report Post Thanks(0) Quote Reply Posted: November-28-2005 at 1:43pm
	I have seen those type used in larger offshore boats, Never seen one fail. I like the idea... Not so sure it would prevent any damage to wheel or trans, but for sure reduce vibration.
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mackwrench Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: February-25-2005 Location: Gone Status: Offline Points: 190	Post Options Post Reply Quote mackwrench Report Post Thanks(0) Quote Reply Posted: November-28-2005 at 1:45pm
	Oh ya... and I already use that type of engine insulated mounts
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captan1 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: June-02-2004 Location: United States Status: Offline Points: 180	Post Options Post Reply Quote captan1 Report Post Thanks(0) Quote Reply Posted: November-28-2005 at 2:28pm
	I have them on my twin engine boat, they give you just a little leway on your driveline adj. I did order one for our CC.
	1978 Ski Nautique

79nautique Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: January-27-2004 Location: United States Status: Offline Points: 7872	Post Options Post Reply Quote 79nautique Report Post Thanks(0) Quote Reply Posted: November-28-2005 at 3:02pm
	If you use one of these, then don't you need to shorten the shaft length to prevent shaft flex aft of the strut? And if you don't shorten it, wouldn't you be interducing more vibartion because the prop is further away from the strut?

captan1 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: June-02-2004 Location: United States Status: Offline Points: 180	Post Options Post Reply Quote captan1 Report Post Thanks(0) Quote Reply Posted: November-28-2005 at 5:06pm
	All good thoughts, I used them on my twin engine cabin cruiser, mainly because of the difficulty in getting down below deck to check and adjust the motor mounts, they state it gives you a little leeway of the .003 difference in coupler mating.. I don't know if the shaft is original in my CC as far as distance from strut to prop goes, it looks like about 3" with the couplers apart 1/2" and I think the drive saver is around 1/2" thick so what's acceptable, anybody know? The reason for all this is I changed out the rusty motor/tranny mounts last week and I know of the .003 rule but the whole thing was no walk in the park to do, I guess I'm wussing out a little here.
	1978 Ski Nautique

Flexible shaft couplers

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