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MERCURY MARINE 90HP FOURSTROKE EFI Water In Fuel Alarm

🛒 Replace Entire Unit 🛠️ Hire a Pro
CONF DIAGNOSIS ACTION
92%
CONF
Water Separating Fuel Filter
Marine fuel systems often undergo phase separation where ethanol-blended fuel absorbs atmospheric moisture, leading to a water-rich layer at the bottom of the fuel filter. The WIF sensor detects this conductive layer and triggers the alarm. Replacing the filter element removes the accumulated water and restores the dielectric environment required for the sensor to remain in a 'normal' state.
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8%
CONF
Secondary Circuit / Wiring Check
Inspect wiring harness.
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DIY Repair Guide

Watch exactly how to replace the Water Separating Fuel Filter.

// NOTICE: This report is generated by an Agentic AI Engineer utilizing probabilistic modeling.

PartSniper is an automated parts recommender service. AI-generated results may not be correct. This data is not a substitute for professional engineering advice or manual inspection. Always verify part compatibility and disconnect power before any repair. PartSniper is not liable for inaccuracies, injury, or damage.

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