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  2004 170 Montauk with collapsed fuel line.

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Author Topic:   2004 170 Montauk with collapsed fuel line.
WT posted 09-18-2008 05:39 PM ET (US)   Profile for WT   Send Email to WT  
I have a 2004 170 Montauk that was repowered February 2007 with a new 2007 Mercury 90 hp EFI 4 Stroke (Veradito).

Today I went to pick up my boat that was being serviced at my dealer. One of the repairs was to replace my "ethanol proof" 24 gallon Pate tank with a new 26 gallon Moeller tank. I didn't like the connectors on the newly installed Moeller tank so my mechanic proceeded to change the fittings, right there on the spot. He disconnected the fuel line to the Moeller tank and cut the clamp off the fitting. He saw something strange, then he cut a bigger piece off my fuel line and looked inside and then cut off some more of my fuel line.

The lining inside my OEM fuel line was collapsed. I suppose this can cause quite a restriction in the flow of fuel from my gas tank to my motor. Kind of like sipping soda through a collapsed straw? My dealer is going to replace all my fuel lines.

Another item that was replaced under warranty was my Fuel Supply Module (FSM). A fuel hose leading to the FSM had failed causing the engine to not start. Perhaps the collapsed fuel line contributed to the failure of the hose leading to the FSM.

You might want to check the integrity of your fuel lines.

Can this be a ethanol related problem?


contender posted 09-18-2008 08:15 PM ET (US)     Profile for contender  Send Email to contender     
Possible, but if it is a fuel line should be able to support the transport of the ethanol. Could also be a cheap fuel line, or a bad batch of fuel line. I have seen fuel lines collapse before mostly do to a cheap line. I use aero quip lines expensive but last for ever and never no problems...good luck
WT posted 09-18-2008 10:31 PM ET (US)     Profile for WT  Send Email to WT     
The fuel line came with my 170 Montauk when I purchased it new in 2004. I would assume that it is of high quality.

I just wanted others to be aware that they may have fuel lines with collapsed liners.

Maybe I should have posted in the Repairs/Mods forum.


jimh posted 09-18-2008 11:00 PM ET (US)     Profile for jimh  Send Email to jimh     
Warren--Was the fuel hose color gray? Or black?
fishinchips posted 09-18-2008 11:46 PM ET (US)     Profile for fishinchips  Send Email to fishinchips     
well, I think I will have a winter time project on my hands. Changing out the fuel line in my montauk.

Thanks for the heads up warren.


WT posted 09-19-2008 12:26 AM ET (US)     Profile for WT  Send Email to WT     
Jim, my fuel line was black.

WT posted 09-19-2008 12:40 AM ET (US)     Profile for WT  Send Email to WT     
Here's an old picture of my fuel line. Click on the picture to enlarge it. current=Montauk3-18-04004.jpg

Hopefully, this is an isolated problem.


Ridge Runner posted 09-19-2008 11:46 AM ET (US)     Profile for Ridge Runner  Send Email to Ridge Runner     

Not to get off topic, but I noticed in your pic's the external livewell pump. How does that work for you?

WT posted 09-19-2008 11:49 AM ET (US)     Profile for WT  Send Email to WT     
Ridge Runner, works great. Also can be used as a raw water wash down.


frontier posted 09-19-2008 09:35 PM ET (US)     Profile for frontier  Send Email to frontier     
Warren - those red/black battery nuts look like a great idea. Did they come with your batteries or seperately?
jimh posted 09-20-2008 10:12 AM ET (US)     Profile for jimh  Send Email to jimh     
Warren--Thanks for identifying the fuel line. I have seen some older silver colored rubber fuel hose which had been affected by the fuel (probably ethanol), and the liner of the hose was badly detached from the outer portion of the hose. I have not seen or heard of that with black rubber fuel hose, but I imagine there is plenty of it going on.

I suspect that the deterioration was caused by the fuel being used, and that most likely ethanol played a part in it.

The Fuel Supply Module (FSM) you are replacing is mentioned in this advisory from Mercury
(See entry dated September 18, 2008)

as being re-designed to be more tolerant of fuel with high concentrations of ethanol. The Mercury advisory mentions calendar year 2006 as the epoch when this newer design Fuel Supply Module (FSM) was put into production in the Mercury 75 to 115-HP FOURSTROKE EFI motors, also known as the VERADITO motors. Anyone with a 2006 or older motor ought to check with their dealer about the Fuel Supply Module (FSM) and its replacement.

WT posted 09-20-2008 08:59 PM ET (US)     Profile for WT  Send Email to WT     
I need to clarify something.

The fuel line that collapsed was a black fuel line that ran from my fuel tank to my in-line fuel filter.

My boat's fuel lines came from the factory with silver/gray fuel lines. (So if you look at your 170 Montauk fuel lines and they are silver/gray don't be alarmed.)

My black fuel line replaced my silver/gray line when my dealer re-powered my 170 Montauk from a carbureted 90 Mercury 90 to my current Mercury 90 hp EFI 4 Stroke (Veradito). The Veradito does not call for a primer bulb in the fuel line. My old fuel line had a primer bulb in it.

Anyway, I now have new fuel lines but they are all gray. I suppose I should have asked for them to install the best fuel lines available. I'll keep a close eye on my fuel lines now.


jimh posted 09-21-2008 01:05 AM ET (US)     Profile for jimh  Send Email to jimh     
Typically the black rubber fuel hose I have seen is usually given an A1 or A2 rating, while the silver rubber fuel hose I have seen is usually given a B1 or B2 rating. Those markings are required by the Coast Guard regulations for vessels and are explained in 33CFR183.536:

WT posted 09-22-2008 02:36 PM ET (US)     Profile for WT  Send Email to WT     
My dealer installed USCG Type B1 rated hoses.

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