✓12V MPEM CDI Box — Replaces 278001496 / 278000916 / 278001796 Direct aftermarket Multi-Purpose Electronic Module (integrates CDI ignition timing + DESS key ID + start/stop logic) for Sea-Doo 717/720 carbureted 2-stroke PWC. Replaces BRP 278001496, 278-001-496, 278000916, 278-000-916, 278001796, 278-001-796, 278000930, aftermarket LINGYAO MPEM-1496, Dokili 278001796-class, Harbor Tech ESH743698, Solarhome 278-001-496. Specs: 12V DC, original multi-pin main plug (DESS post + power + ignition out + safety sense), ABS/nylon marine shell epoxy-sealed, ~1.5lb. Match old stamp 278001496 before order.
✓For Sea-Doo GS/GTS/GTI 720 Carb 2-Stroke (1997-2005) Engineered for GS 720 (1997-2001), GTS 720 (1997/2001), GTI 720 (1997-2005), GTI LE 720 (2002-04) on 717/720cc Rotax carbureted engine.
✓Fixes No-Spark, DESS Fault & Start-Relay-Clicks-But-No-Fire Resolves MPEM faults: no spark at plugs, DESS light flashes wrong sequence, START relay clicks but engine never fires, intermittent misfire at mid RPM, burnt epoxy smell from front electrical box. Internal CDI SCR or DESS decode chip dies after salt corrosion. New module restores spark + key recognition. Test old: with good DESS key, measure 12V at ign output pin while cranking — 0V/no pulse = dead MPEM.
✓Screw to Front Electrical Box, Plug-and-Play, Neg-Batt First Disconnect negative battery terminal first, open front hatch electrical box, remove 2 mount screws, unplug main harness connector + DESS post lead, lift old MPEM out, seat new unit, plug harness in same orientation (keyway prevents reverse), refit screws, reconnect battery. No dealer programming needed — any standard DESS lanyard will arm the module. Critical: this is a carbureted 717/720 MPEM — if your ski is RFI fuel-injected (GTI RFI 2002+) or 787/800/951 2-stroke or 4-TEC, you need a different module number, not this SKU.
✓Confirm 278001496 Tag + 720 Carb 2-Stroke + Sea-Doo PWC This module has original Sea-Doo multi-pin plug, ABS black shell, 278001496 stamp, and fits Sea-Doo GS/GTS/GTI 720 carbureted 2-stroke only. Before ordering, photo old MPEM and confirm (1) 278001496 or 278000916/278001796 stamp, (2) 717/720cc carbureted engine (not RFI, not 787+), (3) Sea-Doo PWC. Applications outside this scope (GTI RFI, XP/GSX/GTX 787-951, 4-TEC ECM, other brands) use different electronic modules and are not covered.