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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a forum dedicated to diesel engines and their applicable accessories.


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  #11  
Old 07-05-2014
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Re: Gauges for Yanmar YSB-8?

I've never even seen metric pipe anywhere in my trade HVAC, not that I ever thought of looking for it., my dad was a plumber too. so the MM is the size but not actually differen't from what is used here in the USA? seems so.

Diameter Nominal
DN
(mm) Nominal Pipe Size
NPS
(inches)
6 1/8
8 1/4
10 3/8
15 1/2
20 3/4
25 1
32 1 1/4
40 1 1/2
50 2
65 2 1/2
80 3
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  #12  
Old 07-06-2014
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Re: Gauges for Yanmar YSB-8?

Quote:
Originally Posted by deniseO30 View Post
I've never even seen metric pipe anywhere in my trade HVAC, not that I ever thought of looking for it., my dad was a plumber too. so the MM is the size but not actually differen't from what is used here in the USA? seems so.

Diameter Nominal
DN
(mm) Nominal Pipe Size
NPS
(inches)
6 1/8
8 1/4
10 3/8
15 1/2
20 3/4
25 1
32 1 1/4
40 1 1/2
50 2
65 2 1/2
80 3
Metric pipe sizes are very close, but threads are different. Slightly different number of threads per inch for the same OD pipe, and threads have a slightly different shape. See ISO 7-1. From the Engineering Toolbox online:

"NPT threads may look similar to ISO 7/1 threads. However, ISO and NPT threads should not be mixed. ISO threads have 55o taper angle versus 60o for NPT. The NPT root and crest configurations are also different from ISO. For ISO threads pitch is usually measured in millimeters (may be expressed in Inch). The pitch are different."
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Old 07-15-2014
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Re: Gauges for Yanmar YSB-8?

Come on doesn't someone know the metric pipe thread size on our
Yanmars.
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  #14  
Old 07-16-2014
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Re: Gauges for Yanmar YSB-8?

Quote:
Originally Posted by cptjak View Post
Come on doesn't someone know the metric pipe thread size on our
Yanmars.
Unless someone has actually done this, not likely. Try your local Yanmar dealer or Mack Boring.

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Old 07-26-2014
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Re: Gauges for Yanmar YSB-8?

Ok found out VDO makes a metric thread universal kit
With different size adapters for oil pressure and water
temp. That is what I am going to purchase.
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Old 07-27-2014
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Re: Gauges for Yanmar YSB-8?

The sending units from later model Yanmars will fit the YSM. It is a common upgrade. Check with Mack Boring or Torrensen or Hoye Tractor.
I've seen kits from Hoye Tractor parts. http://www.hoyetractor.com/PROD/TS-1470.htm for the gauge sender, $15.75. They also sell an adapter so you can use the sender from the gauge kit for about $10.00.
The alternator from later GM Yanmars has a tach terminal, and is a straight bolt in, same size case etc. Look for Hitachi LR155, 55 amp. You may need to change out the fans, as the YSM is "reverse" rotation. The YSM had a LR 135, 35 amp. The 155 will use a 1/2 horsepower more than the 35 amp, when it is putting out its full 55 amps, which is not that often. You can find the LR155 on line for about $100.00. For some reason it is a few dollars cheaper than the LR 135.
I have a YSM 12 which is why I did the research.
Lou

Last edited by lillia28; 08-11-2014 at 03:15 PM. Reason: additional information and clarity
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