If you find that your Evinrude E-TEC 90 HP engine won't turn over, it can be a frustrating experience. There are several potential causes for this issue, ranging from simple fixes like a discharged battery to more complex problems like a seized powerhead. This guide will walk you through the possible causes and recommended troubleshooting steps to help you identify and resolve the problem.
Introduction
When your Evinrude E-TEC 90 HP outboard engine fails to turn over, it's crucial to systematically diagnose the issue to avoid unnecessary repairs and expenses. This guide focuses specifically on troubleshooting an engine that does not crank at all, rather than one that cranks slowly or cranks but does not start. Understanding these procedures can save you time and frustration, ensuring you get back on the water as quickly as possible.
Possible Causes and Troubleshooting Procedures
- Battery Switch Not On
- Procedure: Verify that the battery switch is in the "on" position. Sometimes, this simple step is overlooked, and it’s crucial for the engine's electrical system to be active.
- Discharged Battery
- Procedure: Check the battery charge using a multimeter. If the battery voltage is low, recharge it fully or replace it if it's old or unable to hold a charge.
- Battery Cables and Connections
- Procedure: Inspect the battery cables for corrosion or loose connections. Clean the terminals and tighten the connections. Measure the voltage drop in the starter circuit to ensure there are no significant losses.
- Faulty Connection or Ground, Damaged Electrical Harness
- Procedure: Inspect all electrical connections and grounds for any signs of damage or corrosion. Ensure the wiring harness is intact and properly connected.
- Blown Fuse (10 A)
- Procedure: Locate the 10-amp fuse and inspect it. If it’s blown, check the wiring for any short circuits or faults before replacing the fuse.
- Wiring Harness Issues
- Procedure: Test for 12 volts at terminal “B” of the key switch using a multimeter. If there is no voltage, trace the wiring harness for any breaks or loose connections.
- Key Switch Malfunction
- Procedure: Test the key switch for proper operation. Ensure it is sending power to the starter solenoid when turned to the start position.
- Starter Solenoid Issues
- Procedure: Inspect the starter solenoid for proper operation. Check the wiring connections and use a multimeter to test the solenoid’s functionality.
- Starter or Bendix/Drive Gears
- Procedure: Check the starter motor and the bendix/drive gears for wear or damage. Ensure the starter is receiving power and is capable of engaging the flywheel.
- Seized Powerhead or Gearcase
- Procedure: If the powerhead or gearcase is seized, it will prevent the engine from turning over. Inspect these components and repair or replace them as necessary.
Summary
Troubleshooting an Evinrude E-TEC 90 HP engine that won’t start requires a methodical approach to identify the root cause. Start with the simplest checks, such as the battery switch and battery charge, before moving on to more complex issues like wiring harnesses and starter components. By systematically working through these potential causes, you can pinpoint the issue and take the necessary steps to resolve it. Remember, these procedures are specifically for an engine that does not turn over at all, so ensure you're addressing the correct problem to avoid wasting time and effort.