Basic question, how do I connect a flexible coupling?

[Roog]

Sorry to ask such a daft question, but how do you connect a flexible coupling to this engine?

There doesn’t appear to be any thread left on the shaft to attach one. My last IC boat engine was an OS10 and I’m sure I was able to attach a separate two piece coupling.

 

[Jerold]

Not a nitro guy, so I might be out in the weeds, but it look like the brass thing (pulley maybe) comes off?

 

[Greywolf74]

I'm not a boat guy, I wish I could help.

 

[WickedFog]

@Slick2500 just did one for his boat.

 

[Grandfather]

When I raced nitro boats, we used an Octura Flex Hex coupler that threaded onto the crankshaft threads and gripped the flex cable prop shaft. Not sure if these are still available.

 

[Greywolf74]

Here what @Slick2500 engine looks like. Not sure if this helps you. I'm expecting Slick to see this thread eventually and comment on it.

 

[Slick2500]

If I had to wager a guess I would think that you remove the nut that holds the flywheel on and put the couple in it's place.

 

[Grandfather]

Yes, you remove the stock nut on the engine that retains the flywheel and replace it with the appropriate Flex Hex coupler.

 

[Roog]

Thanks, I get it, you remove the nut nd replace it with the coupling. Ah ha!

Cheers