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Author Topic: Finding the waterline  (Read 410 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"
MkII, #1431

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
Severna Park, MD

"No one could make a greater mistake than he who did nothing because he could do only a little."
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
"Calypso"
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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: February 27, 2019, 01:33:28 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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