SERVICE AND MAINTENANCE Troubleshooting INERT Before performing any type of maintenance/service, disengage all controls and stop the engine. Wait until all moving parts have come to a complete stop. Disconnect spark plug wire and ground it against the engine to prevent unintended starting. Always wear safety glasses during operation or while performing any adjustments or repairs. SEPARATE SUPPLEMENT SHEET FOR CONTACT INFORMATION, PROBLEM CAUSE Engine fails to start | 1, Bladder Engage knob engaged. .