1996 Johnson Evinrude "ED" 90 LV 125C, 130, 200, 225, 250 Service Manual, P/N 507128, Page 111Get this manual
Recirculation System Servicing
Important disfunctional recirculation system will cause one or more of the following operational symptoms: Erratic or poor idle characteristics Fouled spark plugs in lower cylinders Excessive smoke when accelerated after extended idle Idle quality unusually sensitive to trim angle
Before proceeding with these tests, the engine's operating temperature must be above the minimum specifications listed in Section 4Function Test at Cylinder BlockAll Models
f.il 1Connect an Va in1.0clear vinyl hose between the cylinder block hose fitting and syringe filled with isopropyl alcohol2Press lightly on the syringe plunger: Fluid should move freely through the fitting If fluid does not move freely through the fitting, clean fitting with OMC Cleaning Tool, PI 3266233Repeat Steps and for each cylinder block fittingFunction Test at In line Check ValveV4, V8
1Disconnect the inline check valve from the recirculation systemrJl 2Connect an 18 in1.0clear vinyl hose between fitting and syringe filled with isopropyl alcoholrJl 3Press lightly on the syringe plunger: Fluid should only move freely throu9h fitting If fluid moves freely through fitting (g), replace the in line check valverJl 4Move the vinyl hose to fitting Press lightly on the syringe plunger: Fluid should only move freely throu9h fitting If fluid moves freely through fitting replace the inline check valverJl 5Move the vinyl hose to fitting Press lightly on the syringe plunger: Fluid should not move freely through either fitting or