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Author Topic: Finding the waterline  (Read 805 times)

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John Langford

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Finding the waterline
« on: February 19, 2019, 03:17:34 PM »

I would like to accurately establish how far above or below the waterline the engine raw water outflow joins the exhaust riser in the engine room on the MK II with the M35BC. There must be a simple way to do this that is less trouble than attaching a clear hose to the raw water intake and observing how high the water column rises inside the hose. Any suggestions?

Also, by rough measurement I estimate the capacity of the M35BC aqua lift muffler to be about 12 litres. Has anyone actually done a more accurate measurement?
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John
"Calypso"
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Ekutney

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Re: Finding the waterline
« Reply #1 on: February 19, 2019, 04:03:41 PM »

My drain hose coming from the head sink is clear when initiall installed & I marked the water level.

Next time at boat I will take a pic & post.

I think the water line level is below the water input at the nipple on the exhaust riser but it is close.
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Ed Kutney
1986 C34
S/V Grace #42 shoal keel
Universal M-25
Magothy River
Severna Park, MD

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Edmund Burke

Gregory M

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Re: Finding the waterline
« Reply #2 on: February 20, 2019, 02:14:17 PM »

Maybe this pic will help you, mind you, that is from MK1.5 1990
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Gregory, "Luna Rossa", #1063, 1990, T.Rig Mk 1.5, fin keel. Universal M 35,  Rocna 15,
Penetanguishene ON.

Ron Hill

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Re: Finding the waterline
« Reply #3 on: February 21, 2019, 03:04:36 PM »

Ed & Greg : FYI, the C34 MKII has a completely different muffler setup with their 4 cylinder M35 BC engine, than your MKI.

A thought
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John Langford

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Re: Finding the waterline
« Reply #4 on: February 26, 2019, 12:50:35 PM »

Thanks for the replies. I guess you thereís no easy way so Iíll just start drilling holes in the hull until water comes in. Photos to follow. 😬😬😬
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John
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Ron Hill

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Re: Finding the waterline
« Reply #5 on: February 26, 2019, 04:30:42 PM »

John : Let us know why you need to know that water line level in comparison to the output of the HX???  I'd guess that your column of water is better than drilling holes in the hull to find that level!!

Also your 12 liters may be total capacity, but I believe there are 2 levels - one with the engine running and one level when the engine isn't running.  I also guess that the exhaust hose from the MKII muffler to the exit on the hull is long, but less than the much longer MKI exhaust hose.  Again just wondering what you are looking to do with that data?

A few questions and thoughts  :think

« Last Edit: September 26, 2019, 01:49:32 PM by Ron Hill »
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Stu Jackson

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Re: Finding the waterline
« Reply #6 on: February 26, 2019, 05:53:06 PM »

The exhaust hose on the Mark I boats is 17 feet.
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Stu Jackson, C34 IA Secretary, #224 1986, "Aquavite"  Cowichan Bay, BC  Maple Bay Marina  SR/FK, M25, Rocna 10 (22#) (NZ model)

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Jim Carter

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Re: Finding the waterline
« Reply #7 on: September 24, 2019, 06:04:22 PM »

The exhaust hose on the Mark I boats is 17 feet.

17' from where it comes out of the muffler or whatever it is under the sink in the head? Also is it 1-5/8" id?

TIA
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Water water everywhere but not a drop to drink.
SV Ripple Catalina 34 #360

Stu Jackson

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Re: Finding the waterline
« Reply #8 on: September 25, 2019, 08:51:47 AM »

The exhaust hose on the Mark I boats is 17 feet.

17' from where it comes out of the muffler or whatever it is under the sink in the head? Also is it 1-5/8" id?

TIA

The white box under the head sink is the muffler.

Yes, 17 feet from there to the transom thru hull.

Yes, 1 5/8" I. D.

Here's my record:

Exhaust Hose   24-Feb-12   Outboard Motor Shop      $210.11    1 5/8" 17 feet plus clamps and joint
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Stu Jackson, C34 IA Secretary, #224 1986, "Aquavite"  Cowichan Bay, BC  Maple Bay Marina  SR/FK, M25, Rocna 10 (22#) (NZ model)

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Jim Carter

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Re: Finding the waterline
« Reply #9 on: September 26, 2019, 11:40:04 AM »

Thanks Stu
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Water water everywhere but not a drop to drink.
SV Ripple Catalina 34 #360

Stu Jackson

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Re: Finding the waterline
« Reply #10 on: September 26, 2019, 11:59:12 AM »

Jim,

There's always this from the 101 topics:

Exhaust Hose Replacement 101 with Pictures:  http://c34.org/bbs/index.php/topic,6760.0.html
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Stu Jackson, C34 IA Secretary, #224 1986, "Aquavite"  Cowichan Bay, BC  Maple Bay Marina  SR/FK, M25, Rocna 10 (22#) (NZ model)

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KWKloeber

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Re: Finding the waterline
« Reply #11 on: September 26, 2019, 12:54:20 PM »


waterline -Any suggestions?

muffler - about 12 litres.


John, you could simply take the seawater pump inlet hose off (or sink drain hose) and see at what height seawater just starts to overtop the hose end.

I think the muffler is closer to 13L, but that's from measurements not from putting water into it.  Why do you want to know that volume?

-k
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John Langford

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Re: Finding the waterline
« Reply #12 on: September 29, 2019, 04:48:44 PM »

So that I could sort out which, if any, off the shelf mufflers might be used as a replacement if my original muffler gave up the ghost.

All moot, Iím afraid. We recently trade Calypso in as part of the purchase of a Ranger Tug. While we miss the sailing, motoring along at 8 knots in our shirtsleeves in the always cool and often rainy Pacific Northwest is proving to be a real treat. Calypso is in the good hands of Jim and Allison Lucas who, ironically, are moving from a powerboat to sail. I hope they become active members of the Association.

Finally, thanks to all of the active members of this list for your informative analysis, ideas, and even sympathy as we worked together to keep these fine yachts in great shape. Itís the best boating list in the world and I feel privileged to have been a member for over 16 years. Give the MV Surprise a wave if you see us out there. I guarantee no peace threatening wakes!
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John
"Calypso"
MkII, #1431

Jim Hardesty

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Re: Finding the waterline
« Reply #13 on: September 30, 2019, 06:13:50 AM »

John,
This forum may not be the right place, certainly not this thread, but I would be interested in your views after your switch to the "dark side".  Possibly others would also.  What size Ranger Tug do you have, how does it compare to C34, storage and comfort especially underway in a rough seaway?
My apologies to anyone who thinks I'm out of line.
Jim



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Jim Hardesty
2001 MKII hull #1570 M35BC  "Shamrock"
sailing Lake Erie
from Commodore Perry Yacht Club
Erie, PA

John Langford

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Re: Finding the waterline
« Reply #14 on: October 01, 2019, 06:54:30 PM »

Happy to start the conversation you suggest Jim. Iíll marshal my thoughts and post in a new thread. Iím sure that other Catalina 34 owners have made a move like this, or are at least thinking about it.
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John
"Calypso"
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