Generac Wire Harness BS M/S AT4 OEM #359821

Restore factory-correct electrical connectivity and engine control wiring to your Generac or DR Power AT4 outdoor power equipment with this Genuine OEM Wire Harness. Identified as the Harness-Wire Briggs & Stratton Manual Start (M/S) AT4, this authentic replacement wiring harness is precision-manufactured to exact factory specifications — delivering the correct conductor routing, connector configurations, and electrical integrity required for reliable manual start engine control operation on compatible DR Power AT4 series outdoor power equipment now supplied under the Generac brand.

Important Brand Note:
This part belongs to the DR Power AT4 wire harness family, now replaced by Generac following Generac’s acquisition of DR Power equipment — making this the current factory-authorized replacement harness for both Generac and original DR Power AT4 equipment applications that specify this part number. The M/S designation identifies this as the Manual Start configuration, distinguishing it from the Electric Start (E/S) variant used in AT4 equipment equipped with electric start engines.

What the Wire Harness Does:
The wire harness is the central nervous system of your AT4 equipment’s Briggs & Stratton engine control circuit. It bundles and routes all of the critical electrical conductors that connect the engine’s ignition system, kill switch, safety interlock circuits, and operator controls into a single, organized, protected assembly. Each connector in the harness is engineered to exact pin configuration and terminal specification — ensuring reliable electrical contact at every connection point in the engine control system. A damaged, chafed, corroded, or broken wire harness causes a wide range of electrical symptoms including no-start conditions, intermittent shutdowns, safety interlock failures, and unpredictable engine behavior that cannot be resolved by any other repair.

Signs Your Wire Harness Needs Replacement:

• Engine fails to start or starts intermittently without mechanical cause
• Engine shuts down unexpectedly during operation — safety interlock circuit failure
• Visible chafing, melting, burning, or insulation damage along any conductor
• Connector terminals corroded, bent, broken, or pulling out of connector housings
• Wiring damaged by rodent activity, heat, or physical impact
• Electrical fault that cannot be resolved by replacing individual components
• Routine restoration or rebuild of AT4 series DR Power outdoor power equipment

Key Features:

• Genuine Generac OEM part — not aftermarket or generic
• Manual Start (M/S) configuration — correct harness for AT4 equipment with manual recoil start Briggs & Stratton engines
• Factory-correct conductor routing, connector pin configurations, and terminal specifications
• Maintains proper function of ignition, kill switch, and safety interlock circuits
• Durable OEM-grade insulation and connector housings built to withstand heat, vibration, and outdoor operating conditions
• Direct OEM replacement — installs to factory connector points without modification

Compatibility:
This wire harness fits select DR Power and Generac AT4 series outdoor power equipment models equipped with manual start Briggs & Stratton engines. Always confirm fitment using your equipment model and serial number — found on the data label on the equipment frame — and cross-reference against your unit’s Illustrated Parts List (IPL) or operator’s manual before ordering. Do not confuse this M/S (Manual Start) harness with the E/S (Electric Start) variant — the two are not interchangeable.

Part Details:

• Part Number: 359821
• OEM Brand: Generac (formerly DR Power)
• Part Description: Harness-Wire — Briggs & Stratton — Manual Start (M/S) — AT4
• Part Type: Wire Harness
• Engine: Briggs & Stratton — Manual Start
• Platform: AT4 Series
• Condition: New / Genuine OEM