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De winterization and drain plugs
- Repsolboy
- Scurvy Dog
- Posts: 1
- Joined: May 23rd, 2018, 3:00 pm
- Vessel Info: 350 Mariner
- Location: Toronto
De winterization and drain plugs
We are first year with the Carver mariner and seeking some advice on where the drain plugs go on the Crusader 5.7 mpi engine. There are six in total and i am attaching a picture of 3. Particularly interesting is the one with a hole in it. Just want to make sure not to use it at incorrect drain plug location and block any water flows.
Much appreciated.
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- CYO Supporter
- Posts: 5803
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
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Re: De winterization and drain plugs
Were these left off from winterizing? If so, it's not a good idea. After winterizing is complete, drain plugs should be reinstalled. Plugs are left out by people that don't use antifreeze to winterize so they leave plugs out to avoid water pooling in the bottom of the block that may have not drained initially so it doesn't freeze. The problem with leaving plugs out is that the threads in the block quickly corrode which makes it difficult to reinstall the plugs in the spring. Eventually, the corrosion is bad enough that it wrecks the threads on the soft brass plugs so you replace with new plugs and chase the threads all the time. Eventually the corrosion gets bad enough over the years and completely deteriorate all the threads making it impossible to reinstall the plugs. If you're going to leave the plugs out, you need to coat the threads with a product that will prevent the threads from corroding.
- bud37
- Admiral
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Re: De winterization and drain plugs
- km1125
- Admiral
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Re: De winterization and drain plugs
Mine have six on each engine that I remove. Mine is raw water cooled. Two on the block, as Viper has noted, two on the manifolds, as the lowest spot, then two on the risers. The two on the risers are the most difficult because they go up from the bottom of the riser.
I also have ones on the raw water pump, but I don't typically take those out.
None that I have look like the one shiny one you show. If that is one of the six for each engine I wonder if they substituted it for a real plug. If you have six total and the engines are fresh water cooled, then I wonder if that other plugs are for something else, like the genset or water heater?
- buster53
- Admiral
- Posts: 994
- Joined: May 12th, 2017, 10:41 am
- Vessel Info: 2001, Carver 356
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Re: De winterization and drain plugs
Isn't that engine a full fresh water cooled engine? And if so, why is the block being drained for winterization?
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- CYO Supporter
- Posts: 5803
- Joined: July 10th, 2015, 9:58 pm
- Vessel Info: 1989 Carver 3807 Aft Cabin
- Location: Ontario, Canada
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Re: De winterization and drain plugs
- 390Express
- Captain
- Posts: 238
- Joined: April 6th, 2018, 2:15 pm
- Vessel Info: 1996 390 Trojan Express
- Location: Michigan
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Re: De winterization and drain plugs
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