2007 Evinrude E-Tec 75, 90 HP outboards Service Manual, Page 63Get this manual
INSTALLATION AND PREDELIVERY RUNNING CHECKS
Tachometer Pulse Setting
Confirm accuracy of tachometer reading Adjust dial on back of tachometer to required setting (the outboard should not be running)Outboard Model 75 90 Evinrude E-TEC Tachometer Setting Pulse or 12 Pole
Operating Temperature
An outboard run at idle speed should achieve temperature based on the engine's thermostatic controlIn general, the powerhead temperature should reach at least 104F (40C) after five minutes of idlingCheck that the powerhead reaches idle temperatureRefer to TECHNICAL DATA on p18
Water Pump Overboard Indicator
A steady stream of water should flow from the overboard indicator