[C320-list] Yanmar 3gm30f antifreeze

[Crosby Roper]

The  plug on that hose on my boat has a metal clip on it. To remove the  plug, I unsnapped the metal clip on the hose and used an Allen wrench to turn the plug. It was not threaded, it just backed out once the wrench was turned counter clockwise. I think that turning the allen wrench socket expands or contracts the size of the plug . I would recommend replacing the metal clamp with a threaded clamp.  Hope that helps

Crosby Roper VMD

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From: RONALD HODEL<mailto:ronandgail2 at me.com>
Sent: Saturday, June 26, 2021 6:23 PM
To: C320-List at catalina320.com<mailto:C320-List at catalina320.com>
Subject: Re: [C320-list] Yanmar 3gm30f antifreeze

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://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fyoutu.be%2FaZv4IXFPMqg&data=04%7C01%7C%7Ca61949fc6c7d402101ec08d9390a262b%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637603538014790156%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=QApAebAQ012vVLlUxvmz3Ah0lz8Y4GKXhwqM6Qz3ui8%3D&reserved=0
>
>
> Regards
>
> Troy Dunn
> Hull #514