Have been disassembling and cleaning up one of my OMC 45 hp snowmobile
Wankels – The first is disassembled and the die-cast aluminum side
plates have a band of very hard material embedded just in the area
where the apex of the rotor traverses – It’s about 3/4 inch wide and an
oval shape – Does anyone have information on what this material is and
the process used to embed it into the softer aluminum ? – Can send
photos if anyone is interested -

Roland Friestad

Could be a repair. Always interested in photos.

Paul Lamar

Hello Paul + Roland,

unfortunately I've found nearly nothing in my old papers (printed on paper).


1973 (SAE ?) paper ...
 Trochoid is sprayed with Tungsten Carbide + then honed
 Apex Seals are of 2 piece type, made of Tool Steel
 Side Housing is Hypereutectic Silicon Aluminium with lapped surface

That's all, sorry.

Yours very truly

Frank Herfert

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