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Old 03-26-2017, 07:07 AM   #141
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Originally Posted by sean9c View Post
Anyone concerned about NPT (tapered thread) ball valves on straight thread thru-hulls?
Yes. Though perhaps the thru-hulls are combo threads. Groco makes a line that is.
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Old 03-26-2017, 07:30 AM   #142
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I'll double check those threads, but they are above water through hulls
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Old 03-26-2017, 08:43 AM   #143
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Helmsman 31 - Just shipped to me in Seattle

Yeah I would not really worry about thread mismatch with above water valves. But supposedly, someone correct me if I'm wrong, if you accidentally step on one or drop something on one the valve could break off since only a few threads grab.
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Old 03-27-2017, 09:29 PM   #144
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I checked on these above-waterline thru-hull valves and here is what I found. The elbow in this assembly is NPT. The valve itself where it meets the thru-hull is straight thread compatible. These are 3/4 inch thru-hulls. They are under/almost inside and protected by the bulwark.

The threaded thru hull is apparently made so that a backing plate can be used and would make their appearance much shorter. The picture probably exaggerates their appearance due to being in the foreground.

This is the company purchased from: http://www.yongxiangvalve.com/

Also, the below water seacocks look very different from these with backing plates, etc

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Yeah I would not really worry about thread mismatch with above water valves. But supposedly, someone correct me if I'm wrong, if you accidentally step on one or drop something on one the valve could break off since only a few threads grab.
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Old 03-27-2017, 09:37 PM   #145
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Excellent!

And don't pay any attention to me. I'm currently broken down because I didn't see an oil leak and also didn't pay attention to some other items that needed attention.
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Old 03-31-2017, 02:18 AM   #146
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Old 03-31-2017, 05:03 AM   #147
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very nice!
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Old 05-03-2017, 03:51 AM   #148
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Old 05-10-2017, 01:02 AM   #149
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Fuel burn on Hyundai Seasall S240

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Old 05-10-2017, 11:11 AM   #150
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Almost 8NM/Gal? (I think that says Kts) Very impressive! Is that your normal cruise power setting?
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Old 05-10-2017, 04:48 PM   #151
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I've been shooting for 0.87 gph as the burn rate and then checking speed consistently. I don't know how many hours of operation it takes to get the engine to max efficiency. Assuming I ever get it there, it will be interesting to watch this engine improve fuel burn.

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Almost 8NM/Gal? (I think that says Kts) Very impressive! Is that your normal cruise power setting?
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Old 06-24-2017, 10:39 PM   #152
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Any updates on this beauty?? The boat I mean.....☺
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Old 10-01-2017, 04:50 PM   #153
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I've been researching the Helmsman 31 but I'm not so sure I would go with a engine that is new to this market. How has the Seasall 270 been doing? Have any owners had service issues that needed dealer support?


I know I'm new here and should just sit back and read, but I spent 30 years in the industrial engine business with diesels adapting to EPA regs from Tier 0 through Tier 4.


Even well-established companies have support issues at times (marine no exception), and often more electronics just means more challenging problems that require a lot of training, proper software, more parts inventory, etc.
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