Lower Unit Gearcase McCulloch Scott Outboard 40 hp 1958 1959 1960 USED

Manufacturer 

McCulloch, Scott

Motor Years, Horsepower compatible with

40 hp

I believe this is a 1958-60 motor

Will the unit hold air pressure

This unit was pressure tested and leaked air around the shift shaft

Shaft Length
(manufacturers measure this from the surface of the motor’s transom clamps that rest on the top of the boat transom to the cavitation plate on the lower unit – standard sizes are 15”, 20”, 25”)

15” model

– The shaft measures about 23-1/2” from upper tip of drive shaft to cavitation plate

# of splines on drive shaft

14

Diameter of drive shaft at splines

5/8”

# of splines on propeller shaft

Unsure – the prop comes with this unit

Diameter of propeller shaft at splines

Unsure – the prop comes with this unit

Do the shafts turn smoothly

yes

Does it shift smoothly

yes

Outer housing condition

Fair.  The paint is dull and scratched, but no major metal damage.

Water pump impeller condition

Good.  There is some wear on the outer edges of impeller blades.

Was water or metal found in the oil when drained

Some water was found in the oil when drained.  No metal was found.