2006 Johnson SD 3.5 HP 2 Stroke Outboard Service Manual, PN 5006562, Page 36Get this manual
INSTALLATION AND PREDELIVERY RUNNING CHECKS
Outboard Controls
Confirm that controls can be easily moved into all gear and throttle settings
Operating Temperature
An outboard running at idle speed should achieve temperature based on the engine's thermostatic controlIn general, the powerhead temperature should reach at least 100F (38C) after five minutes of idlingConfirm that the powerhead reaches idle temperatureRefer to ENGINE TEMPERATURE CHECK on p80