TOHATSU 40 Service Manual page 57

Oil Pump
The oil pump is a plunger type mainly containing an internal
2
worm gear driven by engine revolution, a spindle gear, and a
cam shaft connected to engine throttle linkage.
Fuel Pump
The fuel pump is integral with the carburetor or mounted on
3
the side of the crankcase and contains one or more internal
diaphragms (1). The diaphragms fluctuate in response to changing
crankcase pressures (2) which produces fuel input (3) and output
(4) through multiple check valves (5) in the pump.
Carburetors
The carburetors use a pilot system and main system to
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meter and deliver an atomized fuel mixture to the engine for
proper combustion under varying operating conditions.
3-/ 4-Cylinder
T1002
FUEL SYSTEM
T1003
T1004
T1005
3-9