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  1. #1
    Join Date
    Nov 2006
    Location
    lakewood, ca, usa
    Posts
    367

    Default Oh oh lots of steam

    Warming up my twin 350s while cleaning the boat. Engines running at 2000rpm for a few minutes. Running smoothly. Turned around and saw a lot of steam coming from starboard exhaust. No water exiting the exhaust. Shut it down. Engine too hot to mess with anything. Will start looking tomorrow.

  2. #2
    Join Date
    Sep 2008
    Location
    Maryland - USA
    Posts
    8,182

    Default Re: Oh oh lots of steam

    Let's hope it was steam....no water flowing usually equals burning hoses...

  3. #3
    Join Date
    Mar 2009
    Location
    Portland, Oregon,
    Posts
    11,876

    Default Re: Oh oh lots of steam

    Engines running at 2000 rpm for a few minutes. ................... No water exiting the exhaust.

    Two minutes without cooling water may have caused some damage.

    Suggestions:

    Pull things apart and look for signs of interior blistering on the exhaust couplers/bellows.
    You will also want to retrieve any impeller vanes/blades that may have come loose and may have become lodged within the system.
    Rick ... aka Ricardo..... AQ series Volvo Penta repair
    Portland, Oregon
    28' SDN F/B w/ twin Volvo Penta 5.7L DP drives

    "Intellectual growth should commence at birth and cease only at death." Albert Einstein

    Please... no PMs! Post your questions on the forum.

  4. #4
    Join Date
    Nov 2006
    Location
    lakewood, ca, usa
    Posts
    367

    Default Re: Oh oh lots of steam

    Need to find why no water. two weeks ago ran great. Good water flow. Two weeks latter started engine to warm up and no water flow. Both pumps spin with the engine running. Nothing unusual. Need to pull intake to thru hull strainer to see if I sucked up a plastic bag or somehow blocked. Not sure what else would happen instantly at start up.

  5. #5
    Join Date
    Sep 2008
    Location
    Maryland - USA
    Posts
    8,182

    Default Re: Oh oh lots of steam

    I have had two experiences with what I believe were ice bags (discarded overboard)…..the last one was a while back but at cruise.....the smoke trail was less than 100 yards long when I shut off the engines....took out both hoses coming off the elbows....and we changed the impeller while it was apart.....

  6. #6
    Join Date
    Nov 2006
    Location
    lakewood, ca, usa
    Posts
    367

    Default Re: Oh oh lots of steam

    Quote Originally Posted by makomark View Post
    I have had two experiences with what I believe were ice bags (discarded overboard)..the last one was a while back but at cruise.....the smoke trail was less than 100 yards long when I shut off the engines....took out both hoses coming off the elbows....and we changed the impeller while it was apart.....
    Hoses of of the elbows?? Exhaust ?

  7. #7
    Join Date
    Nov 2006
    Location
    lakewood, ca, usa
    Posts
    367

    Default Re: Oh oh lots of steam

    Fixed. Removed intake hose from they hull. Opened shutoff valve. No water. Probing with large screw driver and felt an obstruction. Started working the screw driver and broke the obstruction. Plenty water now flowing.

  8. #8
    Join Date
    Sep 2008
    Location
    Maryland - USA
    Posts
    8,182

    Default Re: Oh oh lots of steam

    Quote Originally Posted by jclays View Post
    Hoses of of the elbows?? Exhaust ?
    yes, exhaust hoses, from elbow down to the first bend....glad is was short and simple.....hopefully, your exhaust hoses weren't damaged...

  9. #9
    Join Date
    Mar 2009
    Location
    Dresden, Maine, United States
    Posts
    365

    Default Re: Oh oh lots of steam

    Were you able to see what the blockage was? I would be tempted to dive and make sure its completely clear before running her to far.

  10. #10
    Join Date
    Mar 2009
    Location
    Portland, Oregon,
    Posts
    11,876

    Default Re: Oh oh lots of steam

    ..............
    Quote Originally Posted by jclays View Post
    Hoses of of the elbows?? Exhaust ?
    Yes, any exhaust "couplers" or "bellows" that may have seen exhaust gasses without cooling water.
    Without cooling water, these parts no doubt saw high temperatures in that 2 - 3 minutes @ 2k RPM.


    Fixed. Removed intake hose from they hull. Opened shutoff valve. No water. Probing with large screw driver and felt an obstruction. Started working the screw driver and broke the obstruction. Plenty water now flowing.
    Did you look at the seawater pump impeller on that engine?
    Even a 2 minute run without water most likely damaged it.
    Rick ... aka Ricardo..... AQ series Volvo Penta repair
    Portland, Oregon
    28' SDN F/B w/ twin Volvo Penta 5.7L DP drives

    "Intellectual growth should commence at birth and cease only at death." Albert Einstein

    Please... no PMs! Post your questions on the forum.

  11. #11
    Join Date
    Nov 2006
    Location
    lakewood, ca, usa
    Posts
    367

    Default Re: Oh oh lots of steam

    Quote Originally Posted by missnancy View Post
    Were you able to see what the blockage was? I would be tempted to dive and make sure its completely clear before running her to far.
    It was some sort of white calcification very hard but crumbled when I started jabbing it with a large screw driver. I was going to call my diver to pay better attention on the intakes and thru hulls.

  12. #12
    Join Date
    Sep 2008
    Location
    Maryland - USA
    Posts
    8,182

    Default Re: Oh oh lots of steam

    where was the 'calcification'....in the sea cock or in the thru-hull fitting?

  13. #13
    Join Date
    Nov 2006
    Location
    lakewood, ca, usa
    Posts
    367

    Default Re: Oh oh lots of steam

    Quote Originally Posted by makomark View Post
    where was the 'calcification'....in the sea cock or in the thru-hull fitting?
    In the thru hull fitting. the sea cock was clear and operational. Seems like the up tube between the clamshell and the sea cock.

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