FORUM RULES UPDATED - The forum rules have been updated to continue to provide a friendly and safe environment for our member community. Please take a moment to review the updated rules and our terms of use and privacy policy. Click here for Forum Rules which has links to the 'terms of use' and 'privacy policy'.
You always use a marine alternator in a boat.
They are ignition protected, which simply means is something goes wrong and you end up with gas fumes in your bilge, the alternator will not ignite them and blow the back of your boat off.