1994 Johnson Evinrude "ER" 60 LV 150, 150C, 175 Service Manual, P/N 500611, Page 86Get this manual
f171 4Install manifold screwsStart with the center and expand outward, torquing in stages to 40-50 inIbs(4,5-5,6 Nm)5Check seals on the balance tubeReplace if necessaryLubricate seals and press balance tube into intake manifold6Secure balance tube to cylinder block with the two retainers7Follow steps in Carburetor Servicing and install carburetors i Fuel leakage could contribute to fire or explosion
'" When installed, pressurize fuel system and check for leaks!
Recirculation System Servicing
1Start the engine and operate at idle speed1.jl 2Remove No.1 cylinder recirculation hose from fitting on the cylinder blockSubmerge end of hose in cup of water: If bubbles appear, proceed to Step If no bubbles appear, proceed to Step 4
INotel Check all recirculation hoses before proceeding3Stop the engineCheck the cylinder block fitting with syringe filled with isopropyl alcohol: If alcohol flows freely through fitting, No1 cylinder recirculation system is OK If flow is restricted, clean the cylinder block fitting4Stop the engineRemove the recirculation hose and inspect: If hose is damaged, replace hose If hose is OK, proceed to Step 5