Kool fuel Corosion

[cassymai]

According to the marina that was doing my spring get ready my cool fuel module is leaking water due to corrosion. Apparently the whole module and hoses need to be replaced with a new version and the part and hoses are $1,200 plus labor.

They found this after they put in a new water pump.

Has anyone encountered this issue.

2006 2600SE 350 mag

Thanks for your feedback

[pascavone]

i find it hard to belive if you don't smell or see raw gas?

your fuel pump is pushing 14 lbs, so you would see an oil sheen of the back of the boat in the water, and you would smell it.

the easy way to check it is to pull the raw water hoses off, and get and air compressor and a rag and pressure test it.

it might just be your $2 plastic drain down plug dripping.

you use 90lbs, with a rage, then raw water and fuel pump pressure is only 14 psi.....

[seapuppy]

nope...hadn't seen that yet.....I can see it if you didn't have it winterized properly....


ouch..1200 bucks .....


SP

[cassymai]

Sorry. Should have clarified the housing is leaking water. Apparently the sea water pick up goes thru this module to keep the fuel pumps cool, and from what I have read it is an aluminum housing but I thought aluminum wouldn't rust.

So the tech is saying after he replaced my water pump I now had better water flow he found water leaking out of the Kool Furl module, took it off and found it to be rusted and the whole unit has to be replaced.

[seapuppy]

if it's al. housing or parts in salt water...that's a reciepe for corrosion right there.....

al. is highly corrosive in salt water...

SP

[shrew]

The problem with these modules is they are the lowest point in the raw water system. Even if you pull the blue drain plugs to drain the water pump, it does not drain the cool fuel module. Merc released a service bulletin about this and suggested that during winterization, after the blue drain plugs are pulled, to turn the key a few times (WITHOUT starting the motor), to force the water out of there. If not properly winterized, if in an area that freezes it will rupture. They don't rupture externall, they rupture internally. So instead of putting leaking fuel into the boat, I believe they leak raw water into the fuel.

An alternative is to hook a pump toa large bucket of propylene glycol, the the pump to a host to the muffs. The start the pump and start the motor. This will ensure there is proper water flow and the anitfreeze will be pulled thorugh everything including the cool fuel filter and prevent this type of behavior. I use a pump because I have a Bravo III and the impellor never seems to draw good enough without the pump assist.