Reply To: Evinrude 18 Water Flow Loss

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September 21, 2024 at 5:47 pm #290989
CHUCK
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    I would suggest removing the lower unit and attaching a water source to the copper tube.  I have a garden hose attachment that steps down to a section of fuel hose for that purpose.    Monitor the water flow with the engine running for a few minutes and watch for the change.  If no change then I would tend to think that the issue is at the impeller.  If there is a change then you have isolated the issue to the powerhead or the base gasket area?