When I first got this boat last year, the engine would fail after going at moderate speed (2500-3K rpm) for ten minutes, and then start up fine after twenty minutes. I replaced the (aftermarket) coil with a stock mercruiser one, and this seemed to do the trick. But last weekend the very same thing happened, and the coil was very hot. Again, after sitting in the Sacramento River for twenty minutes and ensuring that the gas was flowing but that there was no spark, the spark came back and it started up fine and worked fine. Am I right to suspect an overheated coil? There are probably 100hours on this coil, mostly low rpms. Could I be doing something wrong with wiring or timing (it's an aftermarket electronic ignition---pertronix ignitor ii). Should I get a different kind of coil?<br /><br />Thanks for any advice!
<br /><br />i'll order the pertronix flamethrower ii coil to replace the merc one. any advice as to whether i should get oil-filled or epoxy?<br /><br />MANY thanks for everybody's help!