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Author Topic:   2006 CONQUEST: Twin Verado 250: Dealer Can't Find Problem
Hoofhearted posted 03-23-2009 12:10 PM ET (US)   Profile for Hoofhearted   Send Email to Hoofhearted  
I have a 2006 Conquest 305 with twin 250 Verado motors. About a month ago I had a fault code show up on the Mercury SmartCraft. Code was a "207 Strb Lift Pump." This caused a power reduction of the starboard engine and finally a shutdown. I did a little research and it appears to be something in the Fuel System Module (or FSM). This would be both the High Pressure and Low Pressure pumps as well as a float or float switch. I took the boat to the dealer and [the malfunction] was diagnosed as the floats being bad or sticking. The floats were replaced. However this did not fix the problem. After 60-seconds at 4,000-RPM I got the same alarm and shutdown. The dealer then replaced the entire FSM on both engines, which they did while I stood there, and which I appreciated. But,when the mechanic and I headed out for the sea trial, we got the same reaction: Fault 207. We then checked both fuel filters and found no debris. He said the fuel filters looked brand new. We replaced the fuel filters, anyway, but still no change. The engine has been run on the starboard fuel tank as well as the auxiliary fuel tank with the same problem occurring.

What do we check next? Any information big or small would be hugely appreciated.

Also. my boat is in Tampa Bay. Does anyone know of a good Mercury Mechanic in the area? I dont trailer the boat so I need them on the water.


Buckda posted 03-23-2009 12:45 PM ET (US)     Profile for Buckda  Send Email to Buckda     
While I doubt many of us here can provide you better information than a Verado-certified mechanic, you may want to check the batteries and all connections (including grounds).

The engine electronics may be malfunctioning due to a transient current anomaly - an interruption or low current or even a spike in current levels at that high RPM.

Also, be sure your mechanic has contacted Mercury Marine. Other technicians may have experienced this problem before and the factory may be aware of it...or, they may need to become aware of it in case it happens to another customer's motor.

Good luck.

WT posted 03-23-2009 12:59 PM ET (US)     Profile for WT  Send Email to WT     
Check your fuel lines too. My fuel lines collapsed (perhaps from ethanol in my fuel) so there might be a severe restriction in fuel flow to the motor.

Good luck,


jollyrog305 posted 03-23-2009 02:09 PM ET (US)     Profile for jollyrog305    
Same thing happened to my starboard engine on my 2006 305 CONQUEST. Pulled the boat, Mercury Boston Whaler dealer replaced [unclear] and the float, as well as the float in the port engine. I think Merc automatically replaces the other if one [unclear] needs replacement). No problems since. To find a Verado dealer and mechanic, go to Mercury's site and select "find a dealer"
seahorse posted 03-23-2009 05:41 PM ET (US)     Profile for seahorse  Send Email to seahorse     
The reason for the float replacement campaign for certain Verados is the float switch. It is a circular float that travels up and down on a shaft, and the whole works is inside a plastic housing. The ethanol swells the float and it starts to stick on the shaft, sending error signals.

If you remove the float assembly and let it dry, then it moves freely.

The new replacement is more tolerant to ethanol fuels.

jimh posted 03-23-2009 07:08 PM ET (US)     Profile for jimh  Send Email to jimh     
Replacement of the Fuel Supply Module has been common on the VERADO and many owners have reported they have had this performed.

A Verado-certified dealer must have some sort of service protocol that guides him on the diagnosis of a problem like this. A Verado-certified dealer should have access to Mercury service assistance. It is hard to imagine that you're going to get better advice here (or anywhere else for that matter) than your dealer can get from his Mercury factory service advisor and help center.

The notion that you'll get better advice from an enthusiasts website about engine diagnostics and repair than you get from a trained, certified dealer using the appropriate diagnostic instrumentation tells me that people have a rather low opinion of the advice they're getting from their Mercury dealer. If you own a complex, sophisticated, electronically controlled modern engine, you are more or less a hostage to your dealer. If your Mercury dealer can't find the problem, tell him to call Mercury for help. That is the advice you'd likely get from elsewhere, too.

Buoy posted 03-23-2009 07:35 PM ET (US)     Profile for Buoy  Send Email to Buoy     
I had a similar [problem] on my 2006 250 and it turned out to be the supercharger. [Gave no further details. Alluded to another website and suggested searching for an article he posted there. It would be much appreciated if direct links are given to resources instead of suggesting going somewhere else and searching for them--jimh] Good luck!
jimh posted 03-25-2009 07:01 PM ET (US)     Profile for jimh  Send Email to jimh     
Any update on this Verado malfunction? Has there been a remedy?
jollyrog305 posted 03-26-2009 04:56 PM ET (US)     Profile for jollyrog305    
Here are some links - and Still would like to know if the issue was ever resolved.
jimh posted 03-26-2009 10:27 PM ET (US)     Profile for jimh  Send Email to jimh     
I sent an email to the originator of this discussion asking that he follow up and let us know the outcome. I am certain many Boston Whaler boat owners with VERADO power will be interested to learn the ultimate remedy to this problem.

[Removed 19 off-topic comments--jimh]

jimh posted 04-02-2009 08:41 AM ET (US)     Profile for jimh  Send Email to jimh     
As a week has elapsed, I sent the originator a second email asking him to post any new information on this topic.
Phil T posted 04-02-2009 12:20 PM ET (US)     Profile for Phil T  Send Email to Phil T     
[Resumed the topic of discussing the discussion--jimh]
tombro posted 04-08-2009 01:16 PM ET (US)     Profile for tombro  Send Email to tombro     
I have just been notified by my marina mechanic that my 2005 Generation I 225HP Mercury Verado is in need of the latest version of the FSM float. It was originally replaced back in May, 2006, but apparently some 400 odd engine hours of E10 since then has had deleterious effects on the replacement part, as well.
Will keep you posted of anything surrounding this part replacement.
jimh posted 04-09-2009 08:52 AM ET (US)     Profile for jimh  Send Email to jimh     
Will the replacement of the fuel supply module float be provided at no charge?
Mambo Minnow posted 04-10-2009 03:59 AM ET (US)     Profile for Mambo Minnow  Send Email to Mambo Minnow     
I recently chatted on the pier with the Captain of an ocean going tug. He has two RHIBs on the stern. Each RHIB is equipped with two Verado 150s. Given the industrial use and likely high hour usage, I thought his feedback welcome. He'll use them tougher than any recreational user ever will.

He said the supercharger has been reliable and not a problem. However, the fuel system components are NOT holding up to E10 gasoline whatsoever. I told him about the Fuel Supply Module recall, which is a component on the motors that has gone bad.

tombro posted 04-10-2009 06:49 AM ET (US)     Profile for tombro  Send Email to tombro     
Jim, even though I am 10 months outside of warranty, Mercury is footing the bill for the parts. I have to pay labor, but was not charged for the haulout--my boat is wet slipped, and in already.
glen e posted 04-10-2009 09:27 AM ET (US)     Profile for glen e  Send Email to glen e     
The new floats that were released this past summer are holding up well.We have not seen any of the new floats deform so far. Yamaha is having VST problems due to e-10 and e-tecs also have run into the ethanol problems (see etec owner's site). It is terrible stuff. Primarily because some e-10 is much higher, like E-20 and 30.See the note from Mercury here (blog note 9/18)

Hoofhearted posted 04-21-2009 07:57 PM ET (US)     Profile for Hoofhearted  Send Email to Hoofhearted     
Sorry for the lack of follow up. But I'm back and here was the outcome.

You would have thought I would have immediately checked that but my reality was clouded by the warrenty being so good. I needed to have the boat in for a bottom job so I didn't think as hard about the problem as I should have. I just let my self be the lamb headed to slaughter. I relied on the VERY HIGH VOLUME. I relied on them havng seen this problem many times before. I should have trusted myself. Live and learn.......The filters were just under a year old. I actually looked at one with the tech and honestly he and I both thought they looked brand new. But after all the searching it was one little fuel filter.

But I still love those engines and the boat. I'm headed for a week in the keys in May.....

to everyone for the sugestions.

jollyrog305 posted 04-21-2009 08:52 PM ET (US)     Profile for jollyrog305    
Steve – glad to hear your back in business. So to recap…

- Both floats replaced – same Strb problem
- Both modules replace – same Strb problem
- Changed both fuel filters – same Strb problem
- Changed Strb fuel filter AGAIN – problem solved???

I would carry some extra fuel filters and get the castle/socket wrench adaptor for your trip to the Keys :-).

Jordi posted 05-03-2009 11:21 AM ET (US)     Profile for Jordi    
This past weekend I got the "207 Strb Lift Pump" display and the engine stopped working. Did we ever find out if this was related to the fuel filters, fuel floats or the fuel module? Or any combination of the above?

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