1974 Johnson 135 HP Outboard Motors Service manual, Page 20Get this manual
DESCRIPTION
VENTURI
FUEL FLOW
IN DUCEDi LOW
PRESSURE
t.SPHERIC AIR PRESSURE
The fuel system consists of fuel tank, fuel pump, and two carburetorsThe luel tank is non-pressurized, suction operatedA diaphrag mdisplacement type fu el pump on the motor draws fuel from the tank and feeds it to the car buretors through fu el filt erCARBURETORS
Each carburetor is two barrel, side-draft, float fe ed typeHigh- and low-speed jets are fixed Throttle linkage is synchroni zed With the distributor through an adjusting linkage
THEO RY OF OP ERATION