1984 150hp black max questions

[CraZyNOTRT]

Serial number 6432282
a good chunk of the wires need to be replaced.
im not sure if i am finding the right part numbers. dont want to spend all this money and get the wrong parts.
67742 HOSE $110.65
67740 HOSE $110.65
67275 1 GASKET $6.60
89984T 4 IMPELLER $21.95
8M0032834 KEY $2.33
85608 1 GASKET $2.20
858524 GASKET $2.20
42631 1 GASKET $2.29
38970 SEAL $2.60
30271 RING $1.09
93389A 5 WIRE ASSY $4.49
93388A 1 CABLE ASSY $5.23
65999A 3 WIRE ASSY $4.97
62310A 2 WIRE ASSY $3.50
60871A10 WIRE ASSY $5.90
96220A 4 WIRING HARNESS $168.53

ALSO there is one part i can not find, there is a wire under the right side top sparkplug and i can not find it anywhere on any diagram. im going to assume its thermostat, what ever it is it needs to be replaced too.

[CraZyNOTRT]

Come on no one knows what this is??

[boats.net]

That serial number comes up as a 1983 model number 1150623, here is link to parts listing Mercury Marine Mercury Outboard Parts 1983 1150623
The part in photo is a temp sender, part number 97465, number 16 in this diagram Mercury Marine Mercury OutboardParts 1983 1150623 REED BLOCK AND CYLINDER HEAD Diagram