Red Hose On Engine Compartment Floor - What is it?

[Nautibouys]

I have a 2000 Ski Nautique 196 with a red 1/2 inch or 5/8 inch hose with a threaded brass fitting with a hole in it laying on the engine floor near the drain hole. It looks like it runs from the back of the boat. When the boat is started water starts to come out of the brass fitting making the bilge start and run for a period of time. What is this red hose and what should it be connected to if anything? If its not connected how much water should be coming out?

[tadelfio]

RE: Red Hose On Engine Compartment Floor - What is it?

I would think probably a heater hose. Possibly instead of replacing a cracked heater core, it was capped off. Maybe a shower line too. I don't remember what color mine where. Do you have either a heater or a shower that doesn't work?

[Nautibouys]

RE: Red Hose On Engine Compartment Floor - What is it?

I haven't had it very long, but the heater doesn't push very warm air, and I haven't tried the shower at all. What's strange is that it really isn't capped off, it just has a threaded male fitting that has a hole on the end where water is pouring out. Since its just laying on the floor I assume it needs to be connected or capped with a female end. Wondering if its possible that it was disconnected at winterization and not reconnected.

[tadelfio]

RE: Red Hose On Engine Compartment Floor - What is it?

could have been. Posting pics may be helpful.

[Mikeski]

RE: Red Hose On Engine Compartment Floor - What is it?

previous shower would be my guess. cap it

[bchesley]

RE: Red Hose On Engine Compartment Floor - What is it?

Definately the heater hose. Look on the side of the block under the exhaust manifolds and see if there is a open hole. The heater attaches to two locations on the motor. One on the side of the block and the other at the temperature sending unit in the top of the motor.

[Nautibouys]

Re: RE: Red Hose On Engine Compartment Floor - What is it?

Definately the heater hose. Look on the side of the block under the exhaust manifolds and see if there is a open hole. The heater attaches to two locations on the motor. One on the side of the block and the other at the temperature sending unit in the top of the motor.

If its the heater hose, it appears to be the hose that goes from the block to the heater. Any idea why it would be pumping water out of it? Is this a closed loop system and its taking the path of easiest resistance? If the heater is bad, what is the best way to cap the hoses off and do you need to cap both of them?

[WakeSlayer]

RE: Re: RE: Red Hose On Engine Compartment Floor - What is i

is the hose 1/2 or 5/8 ID or OD? And how red? dull heater hose red? or plastic covered bright red?

If that is the OD, it is a shower hose, if it is 5/8 ID, it is a heater hose.

My 1999 shower's hot supply was off the block under the exhaust, and the cold supply was T'd off the hose near the thermostat housing. I plugged the block, and removed the T when i eliminated the shower from my boat.
If you have a shower in there, you also have a valve block. You should be able to shut the center one and not have water at all. The other two are for mixing the flow to adjust the shower temp.

[Nautibouys]

Re: RE: Re: RE: Red Hose On Engine Compartment Floor - What

is the hose 1/2 or 5/8 ID or OD? And how red? dull heater hose red? or plastic covered bright red?

If that is the OD, it is a shower hose, if it is 5/8 ID, it is a heater hose.

My 1999 shower's hot supply was off the block under the exhaust, and the cold supply was T'd off the hose near the thermostat housing. I plugged the block, and removed the T when i eliminated the shower from my boat.
If you have a shower in there, you also have a valve block. You should be able to shut the center one and not have water at all. The other two are for mixing the flow to adjust the shower temp.

It's definitely a rubber hose, exact thickness unknown as its 200 miles away at the lake and I didn't have a chance to measure. Its the dull, rubbery red hose with a white stripe on it. Not sure of mfg, but looks like a Gates or Goodyear. If i remember correctly the shower hoses at least at the controls were Pex Plastic or ABS. I checked with the original owner and he said it didn't have any heater core issues, so it may have been disconnected at winterization and never reconnected. This boat has the 5.0 GM in it so I have to determine where it would connect. It would make sense then that the heater would be pushing cold or luke warm air then I guess. I am surprised that they would run that hose towards the back of the boat first and not out throught the front of the engine compartment, that's why it had me thinking shower.

[WakeSlayer]

RE: Re: RE: Re: RE: Red Hose On Engine Compartment Floor - W

Yeah, I don't get that either, coming from the rear of the boat.
On my SAN, I believe my heater feed comes from the block as described above, and returns to the pump.
On our Mustang, the feed comes from a port in the intake manifold and returns to the water pump.

The smart way to disable a heater is to jump a hose from the feed to the return. I don't understand if you have a constant stream of water coming in or just an initial one. If one hose is off you are going to see a pretty substantial amount of water pouring out of the motor also.

[Nautibouys]

Re: RE: Re: RE: Re: RE: Red Hose On Engine Compartment Floor

Yeah, I don't get that either, coming from the rear of the boat.
On my SAN, I believe my heater feed comes from the block as described above, and returns to the pump.
On our Mustang, the feed comes from a port in the intake manifold and returns to the water pump.

The smart way to disable a heater is to jump a hose from the feed to the return. I don't understand if you have a constant stream of water coming in or just an initial one. If one hose is off you are going to see a pretty substantial amount of water pouring out of the motor also.

I believe its a pretty constant stream as the automatic bilge will run off and on as the engine compartment fills. But its not the amount of water like you would see from not having the plug in. I didn't see any spray coming out of the block, but I have to check it closer. Hopefully, its just an easy fix of identifying where or which side manifold it connects to. Looks like they disconnected it and dropped it and forgot it....

[WakeSlayer]

RE: Re: RE: Re: RE: Re: RE: Red Hose On Engine Compartment F

Do a search on heaters and heater installs. You will find some pics of where they are attached on your engine. Let us know what you find when you get back to the boat.

[Nautibouys]

RE: Re: RE: Re: RE: Re: RE: Red Hose On Engine Compartment F

Found the threaded hole on the block where it is supposed to go. Its on the port side in the middle of the block. The dealership must have thrown a brass plug in it when they saw the open hole. Reconnected the hose, checked for leaks, tested the shower and all works. Thanks for all the help and advice.