How to adjust coils 25 HP Evin 1974

[G DANE]

I am in the middle of rebuilding this engine. When disassembling i could see flywheel magnetos had touched ignition stator coil, causing heat. I now replaced coil. Does anyone know a smart trick to place the coil with the right tolerance to magnets. I do not have an ignition ring, as used by pro's. I can easily get the coils away from magnets, but suppose charging will be weak if distance is to big.

 

[JB]

Re: How to adjust coils 25 HP Evin 1974

Howdy, G Dane.<br /><br />My book on older OMCs describes the reinstallation of the coils thus: "...note machined bosses on armature plate casting - adjust position of the coil to where face of the coil rests flush with the face of the machined boss; . . ." - - "This operation provides correct clearance between coil heels and pole shoes of the magnets cast into the flywheel."<br /><br />This book only goes up to 1969, but I hope this helps.<br /><br />Red sky at night. . .<br />JB

 

[jegervais]

Re: How to adjust coils 25 HP Evin 1974

They eventually developed a special tool, basically a ring that fits over the bosses and allows the perfect alignment of the coils so the don't get whacked by the flywheel. If you're careful, J.B.'s method does work.<br /><br />-John

 

[Mikael-Block]

Re: How to adjust coils 25 HP Evin 1974

Hello Gdane<br />I think you can make an easy tool by yourselfe.<br />Take a flat bar, drill a hole so it fit the crank axel. In the opposit end you can make or instal an angle, maybe making it adjustable.<br />I have made a simpel drawing, but don't know how to put it in the reply.<br />maybe I can e-mail it to you.<br /><br />Mikael <br /><br />