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post #1 of 13 Old 05-06-2015 Thread Starter
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raw water puzzle

Oday 35 with Universal M-25XP

It looks like the raw water has a hose that goes to the mixing elbow as expected. What is surprising that the the hose that goes to the mixing elbow has to t fitting an another hose that runs all the way to the back of the boat and their is another mixing type fitting into the exhaust just before it exits the back of the boat.

What is the purpose of the second mixing elbow.

The small hose going into the big hose is what I'm talking about.


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post #2 of 13 Old 05-06-2015
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Re: raw water puzzle

Sounds and looks like a syphon breaker

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post #3 of 13 Old 05-06-2015
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Re: raw water puzzle

Water lying in the small hose may prevent air from entering the system. This causes the engine to fill with raw water. This is annoying.
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post #4 of 13 Old 05-06-2015
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Re: raw water puzzle

It looks like your exhaust is going overboard through a plastic thru-hull. That can't be good.
I'd be afraid the plastic would crack and let CO into the boat.
Hoses are all double clamped, that's good.
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Re: raw water puzzle

I may want one of those myself. LOL. Where does the little hose go?

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post #6 of 13 Old 05-06-2015
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Re: raw water puzzle

Plastic thruhulls? Woah, you have bigger issues here.
Also no seacocks...
your a sinking, looking for the right day to happen.


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post #7 of 13 Old 05-06-2015
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Re: raw water puzzle

Seacocks not needed all these thru hulls are above the waterline I assume

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post #8 of 13 Old 05-06-2015
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Re: raw water puzzle

This 'octopus' drains well 'above' the water line, does it?

If not, those nylon through-hulls are a BAD idea, as nylon 'hydrolyses' (weakens) in constant contact with water and exposure to UV.
The small clear (well degraded) plastic line from the siphon break (?), is probably a 'pisser' - it discharges into the small plastic hose and then overboard; in this case most probably the vent valve in the siphon break has been removed - stupid!.

If this 'octopus' is very close to the water line, its a good way to sink a boat. If so rip it out, install a 'sea chest' (common discharge manifold with proper single bronze sea-cocked through hull).
This boat hasn't passed a rigorous insurance survey in a very long time; since the mid 1970s ... correct?

;-)

Last edited by RichH; 05-06-2015 at 10:22 AM.
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post #9 of 13 Old 05-06-2015
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Re: raw water puzzle

I would make the same assumption, unless he is healed.
Plastic is easy to snap, and a very poor choice for anything larger then a bass boat.


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post #10 of 13 Old 05-06-2015
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Re: raw water puzzle

Quote:
Originally Posted by hopcar View Post
It looks like your exhaust is going overboard through a plastic thru-hull. That can't be good.
I'd be afraid the plastic would crack and let CO into the boat.
Hoses are all double clamped, that's good.
Look closer the exhaust is bronze just needs a lil cleaning the rest of them appear to be standard plastic thru hulls commonly used above the waterline

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