J&N 400-44046 Alternator – 12 V 80A – Marine / Diesel Engine Replacement Alternator
Brand new J&N 400-44046 alternator – 12 Volt, 80 Amp output
Internal voltage regulator, fully insulated terminals
Standard small-case marine/diesel alternator design
Single-groove pulley (V-belt) — typical for marine and small diesel engines
Terminal layout: Light / Relay terminal; stator output (blue wire) for charging systems
Mounting ears: includes multiple mounting ear holes for flexible fitment
Suitable as a replacement alternator or spare for many marine/diesel engines originally equipped with similar alternators
New and unused — ready to install
This alternator is widely used as a replacement or replacement-equivalent for many marine and diesel engines — especially those originally fitted with a small-case, 12 V 80 A alternator. Compatible or widely advertised for:
YANMAR marine diesel engines including: 3JH2, 3JH2BE, 3JH2E series (early 1990s-late 1990s) DB Electrical+2DB Electrical+2
Other Yanmar marine engines such as 3JH3, 4JH2, 4JH3, and variants of 4LH / 6LY — when those engines originally used a small-case 12 V 80 A alternator. IBSPOT+2BottomLine Marine+2
More broadly: marine / small diesel engines where a 12 V 80 A alternator with small-case mounting is specified — ideal for boats, small work vessels or diesel-powered craft requiring reliable 12 V charging systems
Note: Because mountings, belt configurations, and engine variants differ, buyers must confirm their existing alternator’s mounting, size, and terminal layout match before purchase.
Item is new, unused, and ready to install
Buyer must verify correct fitment with their engine: check mounting ears, pulley type, electrical connections
Ideal as replacement or spare alternator for marine and diesel engines, especially for older or common marine-diesel models
Please confirm engine model & original alternator part number prior to bidding / purchase