Don or anyone. question on WP hose location

[Luke]

Serial # 0g105525
1994 Mercury 200hp 2.5L XRi


so been working on the old boat trying to get it set up.
got the water pump put in this past weekend.
next thing I want to look into is the WP gauge does not work. im thinking the gauge is broke since the needle is pegged all the way around all the time.
but I was curious about something over the weekend.
when I put the pump in there is a small hose on the front of the Lower unit that runs inside and connects to a small barb type fitting. the hose looks to be about 1/8" inside dia.
I assumed this was the WP hose that went up to the gauge. it had a spot in it where someone had put in a union so it was able to be pulled apart to take the lower unit off.
when I put the pump back in I didn't have this hose hooked back up. and I assumed that when I started the motor up on muffs that it would pump water out. well it never did. so is this just a vent for the lower unit?
if so were is the WP gauge hose hooked up to on the motor.
want to get the gauge working when I start tweaking around with props.
I will say I never pulled the hose off the back of the guage and started it up to make sure its got pressure there but wanted to get all my bases covered.

[revlimiter]

The little hose on the front of the flgearcase is for a speedo pickup. Look at the leading edge of the case and you'll see a tiny hole, that's where the water comes to that line from.

[JOE54]

there is a hose that comes from popett valve to top of block need to tee into it

[EuropeanAM]

Preferably as close to the top of the block as possible. And if that gauge is pegged, it's toast.

Front fitting on gearcase is, as you expected: pitot.

[WB]

I had 2 gaguges freeze and it killed both. I ended up putting tee and radiator drain off the gauge hose under the console and routed it to where I can open it after each trip in the winter. I do get a wet foot on occasion. It works tho.

[Luke]

Preferably as close to the top of the block as possible. And if that gauge is pegged, it's toast.

Front fitting on gearcase is, as you expected: pitot.

Don by chance do you have a part number or diagram that I could look at to get a better idea on what im looking for?

[JOE54]

hose just behind flywheel cover center top of block connects to 90 degree elbow fitting only hose up there

[EuropeanAM]

[Luke]

Thank you much Don that helps a ton