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Questions regarding Mercury gen 3 cool fuel module and it's new replacement

Old 02-20-2019, 12:47 PM
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Default Questions regarding Mercury gen 3 cool fuel module and it's new replacement

Hi as the title says I have some questions regarding the Mercury gen 3 cool fuel module and the new replacement module. I have found some signs of the dreaded paint pealing when I removed the assembly to look at my fuel filters as well as on the bottom opening of my Fuel pressure regulator. I have a 2006 496 Mag HO BBC engine with low hours on it. I'm not the original boat owner I bought the boat a couple of years ago from a dealer. I want to get the truth and full story of what Mercury is doing for customers regarding this issue? I have heard that they have a new replacement module via a Service Bulletin that came out which effects many of their engines but the SB is mostly about leaking fittings that were causing corrosion. I have also heard rumors that this new fuel module not sure what the official name of it is New Gen 3? Gen 4, also has been painted inside of it, don't know if that's true or not? Hopefully it isn't. I'd like to know what the real fix and resolution is for the paint flaking problem inside the top part of the fuel module is and what Mercury is covering for boat /engine owners that are experiencing this issue? Are they covering full parts & Labor? just the parts? or what? I haven't had the entire fuel system checked out yet, but my guess based on what I have read is that the paint flakes are probably in the fuel rail and also in the injector baskets and possibly the injectors. I have experienced some intermittent stalling out at idle speed. I live in Michigan and so my boat is currently tucked away in storage but this is something that I want to have addressed as soon as I pull it out in the spring. I just want to know what others have had Mercury do for them to resolve this issue? and What was covered by them and what wasn't especially recent cases of this not from 5 or 7 years ago. Thank you in advance for your reply.
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Old 02-20-2019, 01:28 PM
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Paging Dr. BUP
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Old 02-20-2019, 02:38 PM
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LMAO You guys are funny -- SOMETIMES haha

Anyways the jist - the top to gen 3 cool fuel is worst for shedding paint. That whole top section - the regulator section that paint most likely already went on its way to the fuel rails and then into the damper inwhich is a dumpster for corrosion and paint collecting -- the damper housing -- then the paint also made its way to the fuel injectors.

There is NO WAY around it -- the paint made its way elsewhere - forward from the gen 3 cool fuel module. It is a huge Common problem. It would be wise to send the fuel injectors and fuel rail to whomever or me. I am sure many can vouch that I have done plenty of times and give out very detailed info to make things all good again with the 496 fuel systems and injectors.

The latest cool fuel does not have the paint but is anodized. I have all the SB s that Mercruiser ever put out. Indmar and Volvo as well. And Mercury Racing. Anyways the paint never stays put. No sales pitch about any of this, just the facts. It is always best to call if any more info is needed from whomever I do not mind the phone calls. And best to call after biz hours

The fuel rail inspection is very important as well. The damper as well. There is 2 orings that seal the damper in the housing. THIS IS VERY IMPORTANT = When not sealed properly - is will cause running issues and at times some really bad running issues. Also at times fuel leaks and or air leaks. NOT good for safety and your engine. Just saying.

Basically covered a small jist of this issue here. Hope this helps all
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Old 05-13-2020, 11:20 AM
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Can I disassemble my original CF3 modual and inspect for paint issues and remove any remaining paint?
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Old 05-13-2020, 01:04 PM
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anybody have contact info for BUP?
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Old 05-13-2020, 02:11 PM
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I sent you a PM with his contact information. His is very knowledgeable on the subject I was going to pull mine and send down this spring but decided to wait until the fall a decision I hope i don't regret. My 496's have some hours on them.
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Old 09-25-2021, 09:11 PM
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Can you send me the phone number to BUP also. I have the same engines and problem. Thx
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Old 09-26-2021, 12:14 PM
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Originally Posted by mike sampers
Can you send me the phone number to BUP also. I have the same engines and problem. Thx
https://www.boatunlimited.com/

FYI. John has went WAY above and beyond what anyone would have in helping getting my last and my new boat back in order. Tremendous resource. I would not be in this sport still without his help and if I was I would have made many many more costly mistakes thatís a fact. Anyways, give him a call he knows the 496ís like no other.
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