Compatibility: GX390 13 HP, GX340 11 HP, GX270 9 HP, GX240 8 HP; Afron (1990–2006); Allmand (1994–2005, 2004–2008); Denso 0.5–0.6 kW PMDD/PMGR starter. Key benefits: essential start component that controls battery current to the starter. Efficient energization of the starter solenoid ensures reliable, smooth engine start and reduces crank delay. How it works: Turning the ignition key sends an electrical signal to the relay, closing the circuit and allowing high current to flow from the battery to the starter. This fast activation is critical to engage the starter and crank the engine reliably. Placement: typically located near the battery or the starter solenoid, designed for optimal connectivity with minimized voltage drop. Placement varies by brand and model, but access for maintenance is straightforward. Attributes: compact form factor, durable electrical construction, and compatibility with PMDD and PMGR starter systems listed, delivering consistent performance. Use scenarios: 1) Replace worn starter relay in GX-series engines in portable generators or lawn equipment to restore reliable starts. 2) Service Afron portable generators (1990s–2006) and Allmand units (1994–2005, 2004–2008) to prevent starting failures. 3) Maintain Denso PMDD/PMGR starter‑equipped engines in industrial or construction equipment for dependable cranking.