How to almost sink a boat.
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How to almost sink a boat.

  1. #1
    AAARRRRRGGGGGGG!!!!! Motomatt68's Avatar
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    Default How to almost sink a boat.

    I took my boat out on the river for the first time this year. I put the boat in and pushed it over to the side of the ramp and noticed that the back was filling with water. After a short investigation I realized that I had not put the drain plug in. No problem I put in the plug and started the bilge pump and got everything else ready.

    Ten minutes later I we take off down the river and I notice that we are taking on water fast. I kill the engine and go back to make sure the drain plug is in. It is but the engine seems hot. The temperature gauge says that it is less than 120 which seems normal since it has only been running for a couple of minutes. In the few minutes that we are stopped I notice that the water level in the boat has stayed the same.

    The engine temperature was something that I noticed but didn't pay any attention to because I was thinking about sinking.

    I started the boat again and revved the engine to around 3000 and couldn't get on plane when I noticed that the water level in the boat was rising again so I turned towards the shore (which was a 20' cliff). The engine started to sputter but we made it to an area where the kids could get on some rocks so if we sank everyone would live.

    After some investigation I found that the hose from the jet to the cooling system had come disconnected. I hadn't noticed it because of all of the water that was in the boat from the missing plug. I put it together and started it up. It ran fine but wouldn't rev over 3000. I drove straight back to the ramp and loaded up.

    I have to say that I was scared to death when I realized that I was floating down stream in a sinking boat on water that is about 59degrees with cliffs on both sides and two nine year olds.

    Now that everyone is safe I wonder about the damage that I did to my engine. It is a 455olds that looks like it has been stored outside but it has always run well. I am guessing that the first thing to go would be valves. I was only running with out water for 5 minutes but I know that that is more than enough to kill it.

    I am going to do a compression check this week but how can I know if I ruined the bottom end? What should I check first? What was most likely damaged?

    Matt.

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  3. #2
    Senior Member Boat 405's Avatar
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    how hot did it get?
    Boat 405.

  4. #3
    AAARRRRRGGGGGGG!!!!! Motomatt68's Avatar
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    I don't know how hot it got. My gauge reads the water in the intake manifold. Which is why it was looking cool, there was no water to read. Once I hooked up the water hose it went up to 160 and stayed there like it always does. I assume that it is because the water is constantly being refreshed and once the thermostat opens at 160 it is replaced by new water. When it was initially hooked up it might have gone higher but I was not paying attention. All I could see was the boat ramp.


    I noticed that it was hot initially because there was water that had splashed on the intake manifold that was boiling.

    Matt.

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    Senior Member Jetboat Jared's Avatar
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    they way i look at it is the boat is still floating no one was hurt who cares how much a new engine cost.

  7. #5
    Member danfornow1's Avatar
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    Heads and head gaskets are usually the first to let loose. A compression ckeck should answer that. Lower end should be ok if top end survived as long as oil pressure didnt fall off
    Glad everyone is ok thats whats most important.

  8. #6
    " Live Laterally " Dominator's Avatar
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    Very glad to hear everyone is safe and dry. I think now is the opportunity to drop in what you like ( FORD in your case ) and ditch the 455 olds.
    " NO MOTOR NO BOATER "

    " I'd rather be riding in my boat thinking about God, than in church thinking about my boat ".


  9. #7
    AAARRRRRGGGGGGG!!!!! Motomatt68's Avatar
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    I may never get my wife back in the boat again and the kids thought it was pretty cool. I am very grateful that everything turned out fine. The danger of sinking was not nearly as real as it seemed when I couldn't figure out why the boat was filling with water.

    I am starting with the idea that the engine is toast and I will be happy with anything that I can salvage. I have some hope. The oil was new and I don't think that I ran it long enough or got it hot enough to fry the bottom end. I am assuming that the bottom end has more oil and more of a heat sink available than the valves do.

    Maybe I can get away with some new Edelbrock heads and intake manifold and a carb... And a rebuilt jet, and some new paint, and an F350 to tow it, and maybe some other stuff?

    maybe.

    Matt.

    edit. also I know a lot more about chevys than fords, I just like cartoon boobs.
    Last edited by Motomatt68; 05-09-2010 at 07:23 PM. Reason: ps

  10. #8
    Senior Member Sanger Pete's Avatar
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    One evening on the delta, I sucked up some weeds, which limited my speed to under 5 mph, no matter what the rpms were. After a few minutes of heading back to the marina/houseboat, the motor started popping and creaking (covered engine) and I realized it was HOT (from the restricted cooling water). I turned it off and we drifted for an hour or so, turned it back on and ran it until it got hot (not too hot) again, and repeated this for the next several hours until we got back to the marina--at about 3am.

    The next morning I got the weeds out and ran the boat for the rest of the trip, and for several more years--no problems. 455 Oldsmobile, 20 years old, got really HOT, and never broke on me--just wore out after 23 years.

    My guess is that if it ran OK after you got the hose back on, you'll be OK--unless you're looking for a reason to make a change.

  11. #9
    AAARRRRRGGGGGGG!!!!! Motomatt68's Avatar
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    I am really not looking forward to doing a lot of work or spending a lot of money. I am building another boat and hoping that this one would last until I got it done. I am also perpetually working on my 4x4 and working full time and going to school full time and I have three kids, 2 in college, and a wife who wants a new car. I really don't want more to do or spend money on anything else but if the engine is fried I will fix it. I am hoping that it will work and actually hopeful that there has not been too much damage. Thinking about how it drove back it didn't have any problems until 3000rpm and then it sputterd some. I didn't try to take it over that so I dont know. I will find out with the compression test on tuesday or wednesday (my days off)(I have two test to take and a paper to write and my wife will be out of town but they are my days off.)

    Matt.

    ps. after reading this it sound like I do a lot but I also seem to find time to watch every hockey playoff game and I'm not very organized. I really am quite lazy.

  12. #10
    Living in a cage of fear thatguy's Avatar
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    Most likely hung some valves, baked some rockers, and MAY have some cracks in valve seats?
    Tommy
    Quote Originally Posted by Rexone View Post
    Tommy please remove all Jimsplace quotes from your sig and don't put more back. He doesn't like it and it is against the rules. Thank you.
    "So as through a glass, and darkly
    The age long strife I see
    Where I fought in many guises,
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    Gen. George S Patton

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    Senior Member stc315's Avatar
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    Had similar problem (sand plugged up the lines). The heat actually caused carb problems (killed press regulator, overpowering needle & seats). Check compression, check ignition (could have gotten some steam in there) and carb.

  14. #12
    Senior Member CK7684's Avatar
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    Kinda hard to really say if you damaged anything. Just be easy on it till you know...
    I've had a hose break on me before...NOT FUN!! It's always important to double check everything before putting in!!

  15. #13
    Senior Member ol guy's Avatar
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    For what it is worth a temp gauge will not read ambient temperature so its a wild geuss as to how hot. Also GOOD CALL on heading heading to a shore line nomatter what terrain, brains save lives. Glad everyone is okay and probably with alittle love the olds will live again.

  16. #14
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    Default Heads?

    I have some used Olds heads if you find them to be unrepairable, ie: cracked, bad seats etc etc.......Used, but not abused, cheap, located in Bullhead........Ray
    LOUD BOATS SAVE LIVES

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