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Wankel Boat Motor - Information Requested

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Wankel Boat Motor - Information Requested

Old 10-14-2019, 05:36 PM
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Default Wankel Boat Motor - Information Requested

In cleaning out my father's barn, I found an early 70's Wankel NSK Boat Motor. He had it in an aluminum flat bottom boat for fresh water river travel.

Is there anyone out there with information on the motor and someone that would/could use it? I don't want to send it to the landfill.
Old 10-14-2019, 05:38 PM
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A rotary engine for a boat?
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Old 10-14-2019, 05:44 PM
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Wankel Rotary Outboard motor from Milan Italy MAC-10 Sachs KM48 160cc?
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Old 10-14-2019, 05:46 PM
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Yes, the Wankel is Rotary and was built for a marine application. NSK is the name plate on the motor
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Old 10-14-2019, 05:50 PM
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this sounds cool. was it jet drive or outdrive or???
Old 10-14-2019, 05:51 PM
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Get 8 more posts and add some pics....super cool..never seen one
Old 10-14-2019, 05:54 PM
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Old 10-14-2019, 05:58 PM
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I'll post a photo tomorrow.
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Old 10-14-2019, 06:00 PM
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OMC (U.S) made one in 73 for racing
four-rotor outboard of two liters. Evinrude


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Old 10-14-2019, 07:11 PM
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https://www.boatingmag.com/worlds-fi...racing-engine/
Old 10-15-2019, 05:02 AM
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Seems they rejected a shitload of heat which was difficult to deal with in a closed environment. There is NOTHING louder than a bridge ported Wankel. Ultimately, emissions killed the rotary.
Old 10-15-2019, 05:15 AM
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Originally Posted by billinstuart View Post
Seems they rejected a shitload of heat which was difficult to deal with in a closed environment. There is NOTHING louder than a bridge ported Wankel. Ultimately, emissions killed the rotary.
And the fact that apex seals fail frequently unless you add a little oil to your gas like a 2 stroke.
Old 10-15-2019, 05:36 AM
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Peripheral port sounds better.
Old 10-15-2019, 05:40 AM
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please dont send it to the landfill.
I have a local buddy who does government work with rotary engines who would love this for his collection.
he also has the original "Rotary Special" 20' bertram that popular mechanics took on the show circuit back in the 60s
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Old 10-15-2019, 05:45 AM
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Originally Posted by billinstuart View Post
Seems they rejected a shitload of heat which was difficult to deal with in a closed environment. There is NOTHING louder than a bridge ported Wankel. Ultimately, emissions killed the rotary.
Guess not...
https://www.roadandtrack.com/new-car...ngine-revived/
Old 10-15-2019, 06:05 AM
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Just saw some U tubed videos on these. Loud and slow out of the hole
Old 10-15-2019, 06:08 AM
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2 rotor engines, even supercharged or turbo charged do not have the torque that boats need to get up and go. They are better suited for smaller lighter boats
Old 10-15-2019, 06:10 AM
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That’s the proverbial ‘blast from the past’. Cool!

Def. don’t scrap it!!!!!
Old 10-15-2019, 06:53 AM
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DEFINITELY do not send it to a landfill!!

I don't know where you're located, but I would offer to save it from that fate!! There may be others closer or in better shape to allow it be be appreciated by future generations though.
Old 10-15-2019, 07:08 AM
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I had a Mazda RX7 which I had ported out and slapped a Holley 750 on. Took off a punch of pollution crap and that car would fly. It didn't have much torgue so you just had to reeve her up to around 8000 rpm before popping the clutch.

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