Inspect the oil for any signs of water intrusion (milky appearance) or metal shavings
This carburetor is designed to work as a direct replacement and is typically pre-set for common applications
as well as Sierra equivalents like 18-80414
Other causes include debris blockages
1 x Idle Air Control (IAC) Motor (3843751/3857696)
Water Pump Impeller Kit – Fits Johnson/Evinrude 40-50 HP (Replaces Sierra 18-3454, Johnson/Evinrude 438592, 433548, 433549, 777805) 70hp Inspect the oil for anyProduct Details This Water Pump Impeller Kit Fits Johnson Evinrude 40 50 HP (Replaces 438597) is engineered for Johnson Evinrude 2 stroke outboard motors, including 40, 45, 48, and 50 HP models manufactured between 1989 and 1998. It is designed as a direct replacement for engines equipped with the small housing variant, ensuring proper cooling system function. It serves as a direct interchange for Sierra 18 3454, and Johnson Evinrude part numbers