No spark on a Wisconsin vh4d engine after replacing coil, condenser, points, rotor, plugs, and wires; power reaches coil and distributor but no spark.

No specific diagnostic tool or guidance for ignition troubleshooting on small engines; user replaced parts blindly without systematic diagnosis.

Severity

4High

Willingness to Pay

implied

Added

Apr 26, 2026

Implied Software Gaps

Interactive ignition diagnostic tool that replaces trial-and-error part replacement

App Concept

SparkCheck Pro

A mobile diagnostic app that guides small engine and equipment owners through step-by-step ignition troubleshooting with visual checks, multimeter integration, and a database of engine-specific wiring diagrams. It eliminates guesswork by telling users what to test next based on symptoms.

Key Features

Step-by-step guided diagnostic workflow for ignition systems
Database of engine schematics and wiring diagrams (Wisconsin, Kohler, Briggs, etc.)
Multimeter integration with Bluetooth probe for live voltage and continuity readings
Success-based branching logic to narrow down root cause

Target Users: Small engine equipment owners and operators in lawn care, construction, and home services businesses, typically solo or with 1-5 employees.

Revenue Model: $9.99 per diagnostic session or $19.99/mo subscription for unlimited use and access to premium engine database

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