Mercruiser 350 MAG MPI hose question


L

luriesd

Member
Hi everyone,

I have a 2000 280 SS with twin 350 MAG MPI motors, with 525 hours. All has been working fine, and I am trying to be proactive on maintenance. My question is this: On the front, top of the motors there is a pump (circulator pump) that has four hoses (two smaller towards the engine, and two slightly larger further forward) coming out. These feel brittle and old, and one has a crack. My plan is to replace. Odd thing is, I cannot find a schematic or any other diagram that shows this part???

The "raw water circulator pump" looks to be elsewhere on the motor. The closest I can figure is this is related to thermostats?

Anyhow, can anyone tell me what that part is (for my knowledge) and the appropriate hose (looks like they are pre-molded to the correct shape) kit replacement would be?

Thanks for being patient with a newbie.


Steve
 
plug your serial # into any of the common merc sites. this is for my 2001 350.

https://www.marineengine.com/parts/mercury_marine_parts/sn/0M047350

the recirc pump should have 1 hose.
the raw water pump has 2

the thermostat housing has a bunch of hose connections.

https://www.youtube.com/watch?v=Y_jRValWb7g

I've considered replacing mine, as when you squeeze them or bend them, they seem brittle on the inside. Just haven't really gotten around to it. I was thinking as long as they don't leak, they are fine, but obviously obstructions could lead to overheating issues. Luckily i'm good on that front.
 
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Thank you! That is the piece for sure. So the four hoses that go from there are probably some hose kit I can buy online? Or can I just by flexible hose of the correct rating and run it myself?


Steve
 
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