1970 Johnson 1.5 HP Outboard Motor Service Manual, Page 17Get this manual
The fuel system consists of fuel tank mounted the power head, fuel filter, and carburetorFuel flows, gravity-fed from the tank to the carburetorCARBURETOR The carburetor is single-barrel, float feed typeThe high and lowspeed jets are adjustableThe carburetor has manual chokeThrottle linkage is synchronized with the magneto the magneto armature plate
THEORY OF OPERATION