Water in the gas...
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Water in the gas...

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    Distinguished Member David 519's Avatar
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    Default Water in the gas...

    Our family ski boat is a Malibu Response with a Mercruiser 350 Chevy Tournament Skier package. Last time out, it started running crappy pulling a skier. When I got home I took the fuel filter/water seperator off and drained it into a clear measuring cup. Was gonna cut the filter apart to see what was in it, but instead saw that out of 15 oz of fluid, it had 14 oz of water in it. It only had about 6 day trips on it. I've had ski boats my entire adult life and have never seen this before.
    Any guesses where the water came from? Condensation in the tank, crappy fuel from the gas station or maybe years of accumulation? We very rarely fill up at a marina, usually use the same local Shell station. The boat is stored indoors when not in use. I would like to understand what's going on and appreciate any info. Got plans for Labor Day and don't want any boat issues...
    thx
    Quote Originally Posted by gn7 View Post
    ....... David 519 is 100% correct........

    Quote Originally Posted by fuelinmyveins82 View Post
    .....I think people forget that racing is supposed to fun. Losing shouldn't be discouraging it should motivate you work on your pile to make it faster.....

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    steelcomp was here
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    Quote Originally Posted by David 519 View Post
    Our family ski boat is a Malibu Response with a Mercruiser 350 Chevy Tournament Skier package. Last time out, it started running crappy pulling a skier. When I got home I took the fuel filter/water seperator off and drained it into a clear measuring cup. Was gonna cut the filter apart to see what was in it, but instead saw that out of 15 oz of fluid, it had 14 oz of water in it. It only had about 6 day trips on it. I've had ski boats my entire adult life and have never seen this before.
    Any guesses where the water came from? Condensation in the tank, crappy fuel from the gas station or maybe years of accumulation? We very rarely fill up at a marina, usually use the same local Shell station. The boat is stored indoors when not in use. I would like to understand what's going on and appreciate any info. Got plans for Labor Day and don't want any boat issues...
    thx
    Probably a combination of all of the above. Next time you're in the water, look to see how the vents and gas caps are in relation to the water.
    I have a friend who I do a bit of off shore fishing with. We always fill up in town, and we spent an entire day trying to get back from fishing with water in the gas, from a Shell station. As long as we were just trolling, the engine would run fine, but every time we'd get the nose up, the water in the bottom of the tanks would build up at the rear of the tank just high enough to get into the pick up. Man was that frustrating!
    If it's not much water, you can pour some alcohol in the tank and it should absorb it.
    If God is your co-pilot, change seats!
    Acts 2:38, the perfect answer to the perfect question.

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    Boat Nut sleekcrafter's Avatar
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    I had water issues at one time, either from on water fuel dock or someone deliberately put water in the tank, don't know but it was about a gallon. With a mirror and flash light I could see it in the tank when it settled. I tried everything, but could not fix the problem, short of draining 24 gallons of fuel. I figured I could direct a siphon hose to the sitting water in the tank, so I tried it. I got it all out by siphoning just 5 gallons of fuel. I then took the five gallons and pulled out the remaining water, and then burned the remaining 4 gallons in the lawn mower.
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    Some guy obnoxious001's Avatar
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    Quote Originally Posted by David 519 View Post
    Our family ski boat is a Malibu Response with a Mercruiser 350 Chevy Tournament Skier package. Last time out, it started running crappy pulling a skier. When I got home I took the fuel filter/water seperator off and drained it into a clear measuring cup. Was gonna cut the filter apart to see what was in it, but instead saw that out of 15 oz of fluid, it had 14 oz of water in it. It only had about 6 day trips on it. I've had ski boats my entire adult life and have never seen this before.
    Any guesses where the water came from? Condensation in the tank, crappy fuel from the gas station or maybe years of accumulation? We very rarely fill up at a marina, usually use the same local Shell station. The boat is stored indoors when not in use. I would like to understand what's going on and appreciate any info. Got plans for Labor Day and don't want any boat issues...
    thx
    Might be the marina gas. I would suggest draining your tanks, one of several ways. Since you are racing, you are likely to have an electric fuel pump laying around you could rig and pump it out, perhaps through the filter or into a vessel or vessels that you can inspect for water.

    This will do three things, remove the water for the next time out, give you an idea how much water there was, and 3rd, allow you to separate the water from the remaining fuel so that it can be used in the boat.

    Next time out, make sure you have a spare filter with you. Sometimes when you remove a filter to check it or drain fuel, the gasket will swell so that it can not be immediately replaced onto the adapter.

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    Senior Member bp298's Avatar
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    one of my old lake boats had a tank vent situated such that it would suck whatever water vapor it could with the boat underway, even with the vent a good 1 1/2' above the water line. the boat had a drainable filter/seperater, so when it would start to run like crap, stop/drain water, good as new 'til next time. relocated the vent, problem solved. i'd just look at tank vent position relative to running/turning/ filling huge bladder to make waves, etc., see if there's anything that needs to be done to the vent to assure it's not exposed to liquid. there could also have been some condensation issues if the boat sat for awhile outside, like through some rainstorms, but you say it's always indoors.
    i have a hard time with the "watered gas at the gas station" assumption, especially with landbased gas stations that cycle a lot of gallons through their tanks. certainly it's possible, especially with a dock station, or stations that don't do much business, but imo it's more likely accumulation along with some condensation. but i'd look closely at the vent/cap.

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    Distinguished Member David 519's Avatar
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    Thanks guys... It seems unlikely it's the cap or vent. I've owned the boat since it was new (it's a 97) and never had this issue before. The cap is o-ringed and the vent is pretty high up above the water. I'll double check those things anyway. The boat is garaged and the garage is somewhat climate controled. The boat has also never been outside during a rain. Bringing another filter is a good idea and I'll also see if there's a way to drain the fuel. I've only looked at the tank a couple times so I don't remember.
    Along those lines, anyone try the commercially available fuel additaves that are supposed to emulsify the water. The shop I get my parts from suggested the Mercruiser brand. I picked some up, but haven't tried it.
    Quote Originally Posted by gn7 View Post
    ....... David 519 is 100% correct........

    Quote Originally Posted by fuelinmyveins82 View Post
    .....I think people forget that racing is supposed to fun. Losing shouldn't be discouraging it should motivate you work on your pile to make it faster.....

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    steelcomp was here
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    Quote Originally Posted by David 519 View Post
    Thanks guys... It seems unlikely it's the cap or vent. I've owned the boat since it was new (it's a 97) and never had this issue before. The cap is o-ringed and the vent is pretty high up above the water. I'll double check those things anyway. The boat is garaged and the garage is somewhat climate controled. The boat has also never been outside during a rain. Bringing another filter is a good idea and I'll also see if there's a way to drain the fuel. I've only looked at the tank a couple times so I don't remember.
    Along those lines, anyone try the commercially available fuel additaves that are supposed to emulsify the water. The shop I get my parts from suggested the Mercruiser brand. I picked some up, but haven't tried it.
    I've always used isopropyl alcohol from the drug store.
    If God is your co-pilot, change seats!
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    I used dry gas. A little hard to find sometimes in the summer though.

    Tim

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    gn7
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    Tony seems to have this same problem all the time, but it isn't his vents or marina fuel Ifyou have had this boat that long and no trouble, I'd have to question the marina fuel. This isn't Malibu first atttempt at building a ski boat, the vents are probably not the problem, but I would still check them.



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    Distinguished Member David 519's Avatar
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    Quote Originally Posted by steelcomp View Post
    I've always used isopropyl alcohol from the drug store.
    That's probably the main ingrediant in the $9 a bottle Mercruiser stuff!!

    Quote Originally Posted by gn7 View Post
    Tony seems to have this same problem all the time, but it isn't his vents or marina fuel
    Now that's funny right there....
    Quote Originally Posted by gn7 View Post
    ....... David 519 is 100% correct........

    Quote Originally Posted by fuelinmyveins82 View Post
    .....I think people forget that racing is supposed to fun. Losing shouldn't be discouraging it should motivate you work on your pile to make it faster.....

  13. #11
    Precision Craft Marine
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    David , I had a problem like that once. My kids were washing the boat and put water from the hose into the vents. My two cents

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    Quote Originally Posted by David 519 View Post
    Our family ski boat is a Malibu Response with a Mercruiser 350 Chevy Tournament Skier package. Last time out, it started running crappy pulling a skier. When I got home I took the fuel filter/water seperator off and drained it into a clear measuring cup. Was gonna cut the filter apart to see what was in it, but instead saw that out of 15 oz of fluid, it had 14 oz of water in it. It only had about 6 day trips on it. I've had ski boats my entire adult life and have never seen this before.
    Any guesses where the water came from? Condensation in the tank, crappy fuel from the gas station or maybe years of accumulation? We very rarely fill up at a marina, usually use the same local Shell station. The boat is stored indoors when not in use. I would like to understand what's going on and appreciate any info. Got plans for Labor Day and don't want any boat issues...
    thx

    Get it fixxed! And on a threadjack note--- The Sanger is back together, and we had it out last weekend. It's very happy!! I know you're a chicken, but it'll be ready for the rest of your family to take a ride in!!
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    cfm
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    Quote Originally Posted by J Shelfo View Post
    David , I had a problem like that once. My kids were washing the boat and put water from the hose into the vents. My two cents
    Ditto for me, but it was me washing the boat while talking to someone for a while. Wasn't paying attention.

    BTW: On isopropyl, most of it now is 80%...exactly what you don't want. Read the label.

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