1994 Force 120 OB disconnected hose

[ggundersen3]

So today after taking the boat out of lake at boat ramp I see this small diameter rubber hose disconnected and dangling from the top of the lower unit? What is that hose for? I attached 2 photos, one with it disconnected/dangling as I found it and the other with it stuffed in the upper hole where it used to go(but I didnt connect it really to anything in the upper hole). Please explain what this hose is for!

 

[Jiggz]

The photos were well intended but because it's taken close up, it doesn't give a point of reference on what part of the motor is this hose dangling from or originally came from. What size is the hose or diameter? Can you take a pic of the t-stat location to see if the previous owner made some mode for a water tell-tale?

 

[ggundersen3]

Ok here are 2 more pics from more distance. You can see the hose comes from the top of the lower unit/gearcase and is supossed to go into another hole right above it and connect to something internally.

 

[redfury]

Looks like a pitot tube hose, some lower units have them built in going to the speedo.

 

[jerryjerry05]

That hose get threaded up to the top of the transom and hooks into
the hose going to the speedo.
I believe 94 was the first year Mercury/Force used their lower units and they had the speedo pickup built in.

 

[ggundersen3]

All correct and speedometer working now. I found the disconnected hose going to the speedometer and connected it correctly. Thanks for the explanation and help!

 

[Jiggz]

Great.