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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a forum dedicated to diesel engines and their applicable accessories.


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Old 07-18-2013
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Incoming water hoses univeral 5411?

I would like to replace the incoming water hoses that go from the incoming water valve to the impeller with hardwall hoses. When I looked @ the hoses that are currently on the boat they are 5/8 ID. When I pull the hose off of the barb it is 1/2 in. Does anyone know what size hard wall hose I should have? My guess is that I need 1/2 in hard wall hoses but, maybe the barbed fittings are not correct?
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Old 07-18-2013
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Re: Incoming water hoses univeral 5411?

It would be better to have the hose a tight fit on the barb, in case a clamp fails. When I put new hoses on my 5424 I think I had to change the barbed fittings. Just be careful to get proper bronze ones, not brass. That goes for any other fitting in contact with salt water.

Good practice is also to double clamp, but only if the barb is long enough. Better to have one clamp than a second one that is trying to pull the hose off the barb because it's only half on.
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Old 07-18-2013
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Re: Incoming water hoses univeral 5411?

Simple; ˝" hoses go on ˝" barbs...

On my Universal M25 (the follow on to the 5411) the intake is a 3/4" through hull with a 5/8" barb on it. The 5/8" hose goes to a strainer with a 5/8" barb on the intake, and a ˝" barb on the out. From there, a ˝" hose goes to the raw water pump, which has two ˝" barbs. Then there is a ˝ hose that goes to the heat exchanger, which also has a ˝" barb on the input, and another on the output. From here is a hose that runs from the H/X to a ˝" vented loop, and then to the exhaust elbow, which also has a ˝" barb fitting.

I hope this helps
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Old 07-19-2013
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Re: Incoming water hoses univeral 5411?

Had a 5411 on my previous boat. All hoses were 1/2 inch. And the replacement for the 5411 was the M15, not the M25.
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Re: Incoming water hoses univeral 5411?

I just replaced all the hoses on my Universal M2-12. They were all 5/8. I had trouble finding a good reinforced hose and ended up using a steel reinforced hose that is normally used for hydraulic application. Not sure that was the correct thing to do so I will watch them for signs of decay.
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Re: Incoming water hoses univeral 5411?

Quote:
Originally Posted by JimsCAL View Post
Had a 5411 on my previous boat. All hoses were 1/2 inch. And the replacement for the 5411 was the M15, not the M25.
Yep, you're right. The 5411 was the predecessor of the M15. The 5421 was the predecessor of the M25.

Anyway, do not use a 5/8" hose on a ˝" barb (as the PO of my boat did).
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