Do you need water jackets

[dasboata]

On say a finned 1717 CC motor I mean do you realy need them ???? Chris

[Diegoboy]

Yes. There isn't any circulating air in a sealed hull

[sailr]

Yes, you definitely must water cool it! OSE may have a jacket to fit it.

[nobbiworld]

I have run the 1717 in racing without and had no problems. Give it a quick run and check.

[Steven Vaccaro]

I would add that it also depends on how hard you push it.

[blizard05]

I would add that it also depends on how hard you push it.

Hey Chris Knowing you,and the way you run,you best water cool those motors

[Simon.O.]

I have seen but never run a finned motor and have thought the same myself.
I do run some Outrunners in confined spaces with few issues if that is of help.

I am working on a new setup in my new rigger that will answer some of these issues.

[drwayne]

Finned motors have sealed endbells...no air flow to cool insides.

worth spending a few dollars to save hundreds more .. ...

W

[Scott T]

I've run motors in race conditions before without watercooling, but the boat was very light and efficient.

If you really don't want to water a finned motor, you could add a couple of fans to blow over the fins. But this works best in a hull with lots of internal volume (i.e. not a rigger!), so you don't heat up the air in the hull.

Unless there's a really good reason you don't want to watercool a motor, it's best to cool it.