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  1. #1

    Default Didn't winterize ...

    Hello all,
    I somewhat unexpected became a first time boat owner this fall, just in time to leave it on its own (in the water) as I left home for work. I wasn't able to winterize the engine (Yanmar 3YM30) before leaving, and optimistically hoped that temperatures wouldn't drop too low before my return. Fast forward to now, and the temperature has been below freezing for about two weeks now. The raw water intake hose is frozen solid, so I'm guessing that the rest of the line is as well.

    The cold snap should be over now and the temperature for the next two weeks is forecast to be in the 30s to low 40s, which I'm hoping will be enough to thaw out the engine so that I can get it winterized. There's a chance I'll be able to finagle shore power for some additional heat but that's not guaranteed. Either way, how can I best determine whether or not the cooling system is still frozen? Should I assume that starting the engine before it's thawed out is a bad idea?

  2. #2
    Join Date
    Sep 2010
    Posts
    23,039

    Default Re: Didn't winterize ...

    What motor ?----What boat ?-------There is a chance that engine block is cracked.-----An expensive mistake.

  3. #3

    Default Re: Didn't winterize ...

    Quote Originally Posted by racerone View Post
    What motor ?----What boat ?-------There is a chance that engine block is cracked.-----An expensive mistake.
    It's a Yanmar 3YM30. The boat is homebuilt, steel hulled with the engine under a cover at deck level and certainly exposed to whatever the ambient air temperature is. You can see the just forward of the wheelhouse in the attached photo. I'm hoping that the early cold spell was the extent of my bad luck/planning but yeah, a crack doesn't seem unlikely.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  4. #4
    Join Date
    Sep 2010
    Posts
    23,039

    Default Re: Didn't winterize ...

    If there is no ice in the impeller at this time the motor can be started.----Then monitor oil level / look for leaks.

  5. #5
    Join Date
    May 2010
    Location
    DC Burbs/Maryland Eastern Shore
    Posts
    2,312

    Default Re: Didn't winterize ...

    If the water the boat sits in isn't frozen then the engine is probably ok
    Practicing the ancient art of ren-ching

  6. #6
    Join Date
    Sep 2010
    Location
    Jersey Shore
    Posts
    6,410

    Default Re: Didn't winterize ...

    Put a work light with an incandescent bulb in the engine box.

    Most of those little Yanmars are FWC...
    Chris
    Dockside Marine Services
    Jersey Shore.
    Mercruiser/Mercury Certified
    Let the insanity begin.

  7. #7

    Default Re: Didn't winterize ...

    Thanks for the advice everyone, I got her started last week after everything had thawed out. The only problem that was apparent after an inspection and about 45 minutes of running was a smallish split in the exhaust hose. I guess I'll know for sure in the spring when I'm running her for longer periods, but if that was the only casualty then I'm counting myself extremely lucky.

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