1978 Evinrude 25/35 HP Service and Repair Manual P/N 5395, Page 107Get this manual
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LOWER UNIT TROUBLE ISOLATION CHART PROBLEM: STEP VIBRATION RESUL
No cloggingGo to step 2 Clogg ing evidentCleon in tokes
Check woter pump ond woter intake possoges
Remove georcose Di