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Old 05-26-2008, 07:27 PM
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sk8salomon sk8salomon is offline
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Dual fuel pumps

just finished my 3rd ski pass yesterday when my buddy circled around me for a chat. all of a sudden, the engine just died. my buddy tried restarting but nothing. so was pulled back to the dock to tinker. i removed the cap on the fuel rail, turned the key on and could hear the fuel pump prime up. then i took a small screwdriver and pushed in on the schrader valve on the fuel rail, no fuel at all! being a holiday weekend i figured i was pretty fawked so i got out my tools and removed the fuel pump assy. looks like my boat has dual fuel pumps which is a good thing i guess. check out this hose.
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Old 05-26-2008, 07:31 PM
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sk8salomon sk8salomon is offline
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this friggen hose reminds me of the bendy/twisty straws you get at six-flags with a lemon-icy. come on guys, what the hell??? so today i went to the parts store and picked up some 3/8" fuel hose & clamps. reinstalled and back in biz. i let idle for about 10 minutes and reved the engine a bit. all a sudden, the engine died again! removed the pump assy AGAIN only to find the 2nd hose now blown. this has to be the dumbest hose i've ever seen in my life. what is going on here???
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Last edited by sk8salomon; 06-21-2008 at 07:57 AM.
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Old 05-26-2008, 07:36 PM
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sk8salomon sk8salomon is offline
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so after some thought i figured this for a dual pump design.... if one pump would go bad, the other pump would probably have enough pressure to at least idle the boat somewhere safe. in my case, since the sending line was severed, the 1st pump was basically dumping fuel back in the tank. the 2nd pump was pumping up the tube into the manifold but then falling back down the 1st pumps broken tube and back into the tank, hence no fuel to the engine. maybe some kind of check valve would let the fuel at least get to the engine instead of returning to tank. i'd say since i replaced the 1st hose with a better quality fuel line, it overpowered the 2nd good hose and eventually ruptured it? who knows but thought i would post this. on a positive note, MC did do a good job designing an easy remove & reinstall pump assy. pat on the back guys but give me a break!
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Old 05-26-2008, 07:45 PM
88 PS190 88 PS190 is offline
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It could be that the ethanol in fuel ate that hose, notice that most things say to use ethanol free fuel, but that's a myth in this area, don't think I've seen fuel w/o 10% ethanol since 2003
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Old 05-26-2008, 07:47 PM
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Pretty sure one pump is high pressure, that other low. That's how mine is anyway, but different engines.
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Old 05-26-2008, 07:48 PM
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sk8salomon sk8salomon is offline
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Quote:
Originally Posted by 88 PS190 View Post
It could be that the ethanol in fuel ate that hose, notice that most things say to use ethanol free fuel, but that's a myth in this area, don't think I've seen fuel w/o 10% ethanol since 2003

wow, that doesn't sound good for others! i couldn't believe how it looked as if the gas just melted thru the hose.
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Old 05-31-2008, 10:53 PM
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sk8salomon sk8salomon is offline
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well, the new rubber fuel line hoses have been in exactly one week. put the boat in today and it took a few seconds to crank up which made me nervous after a perfect mem.day monday. after about 1 minute of rough idling, the engine died again. immediately, i pulled the fuel pump assy noticing one of my new hoses dangling with a hose clamp. i noticed the rubber fuel hose has swollen some, maybe 1/4" overall and i must have not tightened the clamps enough. the hose just shot right off the port on the top side of the fuel pump. even tho the rubber hose was fuel rated, i'm wondering if the entire hose is rated for fuel, not just the inside. being that the entire hose is submerged in gas inside the tank, i'm wondering if i made a mistake here? i put the hose back on and tightened all the clamps up. what i now notice is that because the fuel line is much softer now, the hose clamps really dig into the rubber, almost cutting it. put everything back together, started right up. i let idle for about 10 minutes, giving throttle up and down to 3000 rpm or so, and notice a hesitation and backfiring sound. maybe one of those hose clamps punctured the line and can't get enough pressure? i'm tired of fooling with it, took it in to the dealership this afternoon.
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  #8  
Old 06-03-2008, 11:01 AM
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sk8salomon sk8salomon is offline
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guys, the more and more i read up on ethanol and boats the more concerned i get. is this not a serious issue? especially lately with the added % of ethanol in gasoline. http://www.statesmanjournal.com/apps...805240354/1001
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Old 06-03-2008, 11:01 AM
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Did you snap any pics of the pump assembly as you opened the tank up? Just to put into perspective where these lines are.

I have the 07 TT boat as well. Our boats have the 2008 Millenium pumps in them, which are different from the 07' production pumps. We have the equivalent to 2008 and above's pump assemblies. Supposed to be better.....
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Old 06-03-2008, 11:04 AM
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sk8salomon sk8salomon is offline
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sorry, no pics but i'll photochop one up for ya so you get the idea. is the millenium a "mueller" brand? if so, i have the same setup then.
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