[C320-list] Yanmar 3gm30f antifreeze

[Joe Luciano]

it is a small allen wrench, don’t kknow the exact size.  I drain and refill mine every 1-2 years.  I can get a small container under it, but I have to put the plug back in one time before I get it fully drained out.  I have the YM model in hull number 1024.

Joe Luciano
Second Wind

> On Jun 26, 2021, at 6:54 PM, RONALD HODEL <ronandgail2 at me.com> wrote:
> 
> By fresh water I mean coolant!!  (Not the sea water hoses)
> Ron
> 
> Sent from my iPhone
> 
>> On Jun 26, 2021, at 6:23 PM, RONALD HODEL <ronandgail2 at me.com> wrote:
>> 
>> My biggest question has to do with the YM model. There’s a drain plug in the bottom of fresh water hose coming off the heat exchanger going to the fresh water pump. (The GM model apparently doesn’t have this same hose with the drain plug in it.) I can’t figure out how to get the drain plug out of it. Some say 2.5mm Allen wrench. Some say that doesn’t work.  I’m going to head up to Boatswains Locker sometime and ask them. 
>> 
>> Ron Hodel
>> Lokomaikai #1070
>> 
>> Sent from my iPhone
>> 
>>> On Jun 26, 2021, at 10:50 AM, Troy Dunn <troutwarrior at gmail.com> wrote:
>>> 
>>> Try this video.  Subscribe to his channel.  He has quite a few confidence
>>> building videos for basic 3GM30 maintenance.   Note that you will run into
>>> many of the same issues he describes in the video (e.g. the starboard side
>>> drain will be clogged almost certainly).
>>> 
>>> Hope this addresses your ask.    Once you think you got it, come back with
>>> any specific concerns.   If this is your first time draining and filling,
>>> skip the water heater hoses just like he does in the video.   That is not
>>> necessary too often as long as you are changing the engine side often
>>> enough.  If you are going for a full flush or changing over coolant type
>>> that's a different story, you'll need to do a full drain of all lines and a
>>> lot of flushing…
>>> 
>>> https://youtu.be/aZv4IXFPMqg
>>> 
>>> 
>>> Regards
>>> 
>>> Troy Dunn
>>> Hull #514