Re: SeaKing
Ok only one thing left. <br /><br />The magneto is just a coil of wire wrapped around some thin, insulated, soft Iron laminations. As the magnet on the flywheel passes the coil it introduces a current in the coil which produces magnetic flux which is energy...vit...(Volt-Amps-waiting for the time to be released)....Lenz's law or Maxwell or one of those smart guys of ancient times....<br /><br />Anyhew, to get current to flow in the coil, the circuit must be closed (a complete loop). <br /><br />The closed circuit comes from the points (tied to the flywheel...mechanically and supposedly electrically) which, at the proper time, close and tie one side of this coil to engine chassis (ground).<br /><br />This causes the other side (of the magneto) to immediately provide high voltage to the cap of the plug which builds higher and higher until it jumps the plug's gap and you have ignition. (All this takes place in thousandth's of a second)<br /><br />The energy in the coil of the magneto is dissipated in the heat of the spark across the plug's gap. <br /><br />Now if you have 2 or more gaps, you have to overcome both and usually the magneto is not that powerful. <br /><br />Where do you get 2 gaps? Corrosion in any part of the conduction path.<br /><br /><br /> Hence the points are attached to the flywheel which is attached to the crank, which is tied to the engine block by either internal sleeves or roller bearings, from the block to the threads of the plug thru the plug to the high voltage lead and back home.<br /><br />If current can't flow it will not work. On an engine that old, the "insulation" preventing current from flowing could be anywhere I mentioned. Any interface<br /><br />Point to flywheel mating surface and or screw threads.<br /><br />Flywheel to crankshaft<br /><br />Block to plug threads.<br /><br />All are dissimilar metals in contact with one another, carrying current (electrolysis) and aluminum is involved which loves to corrode.<br /><br />Clean up all your interfaces and see if it doesn't improve things.<br /><br />Mark
<br /><br />Sounds like you covered all the bases. That leaves a weak flywheel magnet. Have a look and see if there's rust between the laminations. That kills them.
