Re: replacing rectifier with regulator
A 30 amp rectifier block shouldn't cost more than about $10.00, but you still need to fasten it to a heat sink unless it comes with one. Being that outboards are primarily aluminum, the power head pan or something similar under the cowl should do nicely for a heat sink. A plain old garden variety rectifier shouldn't have any problems with the higher frequencies coming off the stator. A car regulator typically varies the output voltage by controlling the field winding on the alternator, but outboards usually use the magnets in the flywheel for the field, so this won't work very well. If you know someone with a good knowledge of electronics, I have a regulator circuit that works very well that can be built for a very reasonable cost.