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A 140°F thermostat is standard for raw-water cooled marine engines because it keeps the engine warm enough for efficient combustion but cool enough to prevent salt and mineral deposits from building up in the cooling passages
This usually indicates minor updates or revisions by the manufacturer for improved performance or material changes
It is compatible with Sherwood pump models R30G
9 4-Stroke All years 06192-ZW9-000 Power thrust model
the woodruff key is crucial
Water Pump Impeller Kit – Fits Mercury Mariner 2-Stroke 3.5–9.8 HP (Replaces 47-89980T1, 47-89980Q1) 4.3L-8.2L A 140°F thermostat is standardProduct Details This Water Pump Impeller Kit Fits Mercury Mariner 2 Stroke 3. 59. 8 HP (Replaces 47 89980T1, 47 89980Q1) is designed for a range of Mercury and Mariner 2 stroke outboard motors, including 3. 5 HP, 3. 6 HP, 3. 9 HP, 4 HP, 4. 5 HP, 7. 5 HP, and 9. 8 HP models manufactured between 1979 and 1986. Please verify your specific model and serial number before ordering. It serves as a direct replacement for multiple part numbers, including
