✓12V 4-Terminal External Regulator-Rectifier — Replaces JF2-81910-00-00 / SH267-12 Direct aftermarket external shunt-type voltage regulator-rectifier for Yamaha gas golf cart starter-generator systems. Replaces Yamaha JF2-81910-00-00, JF2819100000, JF2-81910-01-00, JF2-81910-10-00, crossing Shindengen SH267-12, Arrowhead GHI6007, J&N 230-58106, Lester YM1040N, Stens 435-041. Specs: 12V DC, setpoint ~13.8-14.4V, 4 spade terminals (B+/L/GND/AC), ~10-15A match to starter-gen output, aluminum/steel base + epoxy seal, ~70×45×25mm, ~0.1kg. Match old stamp JF2-81910-00-00 before order.
✓For Yamaha Gas Golf Carts G8–G29 with Starter-Generator (1991-Up) Engineered for G8, G9, G11(AK), G14, G16(AX), G20(A), G21(AY), G22(A), G23, G27, G28(A), G29(A Drive) and Yamaha Pro Hauler YXP700A / YXP1000A (2004-06) on 12V starter-gen charging.
✓Fixes Overcharge Boil, No-Charge & Burnt Starter-Gen Resolves regulator faults: battery reads >15V (boils cells), starter-generator runs hot and smells burnt, headlight flickers, battery dead after run, weak spark. Shunt element fails open (no charge) or shorted (overcharge cooks the gen). New unit restores ~14V setpoint. Test old: at 2000 cart-RPM, B+ to ground should read 13.8-14.4V; outside range = dead regulator.
✓1-Bolt to Frame/Gen Bracket, 4-Spade Plug-and-Play Disconnect negative battery terminal first, locate regulator on frame rail or starter-gen mount, remove 1 mount screw, photo old 4-wire positions, unplug 4-spade connector, mount new unit, torque screw to 35 in-lb, plug in same order. Critical: this is a 4-spade external unit (B+/L/GND/AC) — if your cart has no starter-generator (electric G19E/G22E) or uses a 2-yellow+1-red B&S-style regulator, this SKU will not fit.
✓Confirm 4-Spade + JF2-81910-00-00 Stamp + Yamaha Gas Cart This regulator has 4 spade terminals, aluminum base, JF2-81910-00-00 stamp, and fits Yamaha gasoline golf carts with starter-generator (not electric, not WaveRunner, not outboard). Before ordering, photo old regulator and confirm (1) 4 spades, (2) Yamaha gas cart with starter-gen, (3) stamp JF2-81910-00-00. Applications outside this scope (Yamaha electric carts, PWC 6E5-81960, outboards, auto/moto) use different regulator numbers and are not covered.