The mysterious hose

[randyo]

I took my boat out for the first time yesterday, and noticed that the temp gauge didnt rise past 110degrees. In trying to troubleshoot that I found the following hose that leads to nowhere.<br /><br />Per my previous post I ordered a Seloc manual this morning, so hopefully it will get here soon and I wont bother you all with random (easy?) questions.<br /><br />Here is my engine, note the two hoses w/ arrows. The one on the left is plugged in but the one on the right isnt:<br />

<br /><br />Close up of the left:<br />

<br /><br />Close up of the right, not plugged in:<br />

<br /><br />There is a hole it looks like it should plug into, but the adapter it would need (like the left one) is missing. Could this possibly be why the engine temperature doesnt register past 110degrees?

 

[rodbolt]

Re: The mysterious hose

nope<br /> its a vent line that should be plugged in at the flame arrestor. remove the plastic water shield and you should see it.

 

[randyo]

Re: The mysterious hose

Thanks! So I will just leave it be. I'll look further into my low temperature problems and start another post if I get through the troubleshooting I've read about and cant figure it out

 

[djvan]

Re: The mysterious hose

I'm no boat mechanic but if that grommet in the valve cover has a hole in it, that hose needs to be connected to that spot. If it does have a hole you will have to get an elbow and re- connect that hose to it.<br /><br />DougV>

 

[olbuddyjack]

Re: The mysterious hose

I think what rodbolt meant by "nope" was:<br />nope, it has no effect your temperature or guage.<br /><br />Yes it needs hooked up. Get an elbow(look in the bilge first and see if someone dropped it) and do like djvan says.<br /><br />Whats that kinked hose above it goin to the riser?

 

[yoced]

Re: The mysterious hose

Vacuum relief line.<br />Supposed to help alleviate back suction on todays buffer engines. At idle when the valve overlap tries to suck exhaust backwards, these valves will open and allow regular air into the risers exhaust passage rather than having the water from the exhaust outlets sucked back into the engine.

 

[olbuddyjack]

Re: The mysterious hose

Huh! Good idea. Thanks for the info yoced.<br /><br />I saw the check valves like they use on thermactor systems on cars and started thinking "catylitic converter?" <br /><br />Thanks again for the info!

 

[randyo]

Re: The mysterious hose

Thanks guys! It seems the connector is no where to be found. Unfortunately, my repair manual is still in the mail on its way to me--Is there a place where I could find a part number for this? Where would be the best place to order this from? Would local dealers have it on hand or best to order from web?<br /><br />Also, is it best to not run the engine until I get this resolved or not a big deal? much thanks!

 

[rodbolt]

Re: The mysterious hose

they are vent lines<br /> the coast gaurd says the have to go to the flame arrester. the air moving into the engine is used to collect any blow by gasses. did you remove the plastic water shield and have a look at the arrestor? there used to be a plastic elbow in the valve cover grommet just like the other side. most any auto parts store will have one.<br /> old buddy jack<br /> yep its almost identical to the old "erp" valves used with the thermactor. all the way down to the fact they plug up and fail. they need to be tested once per year at least.