How to replace Mercruiser Cool Fuel System

[Christi Gallup]

I forgot the link for the "zinc". https://www.ebay.com/itm/20368836728...3ABFBMxOWegcFg

[Christi Gallup]

Unapproved post...

[Christi Gallup]

Hi chopper,

Your reasoning makes sense. I would have thought the same way regarding detaching the entire fuel line that way. Evidently the fuel line connector that's on my boat is a Push Lock fuel line fitting. I saw a couple of videos on how to remove those (https://www.youtube.com/watch?v=LnFDRwVmDNU). New information for me, certainly.

Did you do anything with the blue petcock that is on the bottom of the cooler at the end, after your replaced the fuel pump? I can't figure out why this is here, except for draining water before touching the oil coolers, perhaps?

I'm on salt water, so I'm also wondering if the little screw (on the image, right above the o-rings), is actually a sacrificial zinc? - It seems to come with all fuel cooler kits, but when I try to place it on the cooler itself, it doesn't fit anywhere.

My old cooler kit pretty much disintegrated from the salt water where that blue petcock attaches and it's bugging me that if this screw is indeed a zinc, it will not be installed.

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[Christi Gallup]

The blue plug holds the water in.... You remove it during winterization. If it is not in with the boat running your bilge will fill with water. and the boat might overheat.

Gosh, I forgot about winterization. I'm in So. CA. Thanks gumby.

Do you happen to know what the single screw in this link right below the o-rings is for? - It doesn't go anywhere on the cooler. Any guesses, anybody? - I contacted two separate vendors from whom I purchased the fuel coolers, no reply. https://www.ebay.com/itm/40358698552...8b1c%7Ciid%3A1

[boatwakes]

Hi Christi, I just got back from world tour for work and saw your messages and post. Check your message box. The screw is for certain applications requiring a threaded high pressure fuel line hold down and is not used in most cases. Please tell me the pump you purchased is OEM because if not, you will most likely have failure issues almost immediately. We replace the blue plugs with stainless units from Hardin Marine. Also, your fuel line at the top of the engine uses a common quick disconnect system and will require a special tool to remove. Any auto parts store carries them and they look like this https://www.amazon.com/Lisle-37000-C...61&sr=8-5&th=1

[Christi Gallup]

Hi Christi, I just got back from world tour for work and saw your messages and post. Check your message box. The screw is for certain applications requiring a threaded high pressure fuel line hold down and is not used in most cases. Please tell me the pump you purchased is OEM because if not, you will most likely have failure issues almost immediately. We replace the blue plugs with stainless units from Hardin Marine. Also, your fuel line at the top of the engine uses a common quick disconnect system and will require a special tool to remove. Any auto parts store carries them and they look like this https://www.amazon.com/Lisle-37000-C...61&sr=8-5&th=1

Thank you, Cory, I replied to your message. The screw information is invaluable. You were the ONLY PERSON among vendors, marineengine, ebay, etc. who knew it!

Best,
Christi