Upgrading Your Alternator? These Are OUR Top Tips - PYS Tech Talk
13 August 2026 · 9 min · 2K views
What this video covers
Upgrading a marine engine to a high-output alternator requires addressing both mechanical mounting and electrical capacity.1:55 Stock alternators typically range from 55 to 90 amps, which often fail to meet the charging needs of cruisers spending extended time at anchor.0:53 Mechanical installation involves sourcing an alternator compatible with specific engine mounts and replacing standard single V-belts with a serpentine belt kit to handle the increased load.2:44 Because belt sizing varies by engine configuration, installers should keep multiple belt lengths on hand to ensure a proper fit.3:44 Electrically, the existing wiring from the alternator to the battery bank often requires an upgrade to a higher gauge to accommodate increased amperage.5:12 Proper mapping of connections is critical, as terminal locations on high-output units frequently differ from stock models.5:34 Adding an external regulator further improves performance but significantly increases the project's complexity and labor time.7:17 A full installation typically requires at least one to two days of work to account for unforeseen complications.
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