Yanmar YM2500

[tmar04]

This is for you YM2500 owners. does anyone know the exact thread pattern for the water temp sender? I thought it was 16 M X 1.5 but that won't fit. could it be 16 MX1.25? I am trying to fashion a gauge/temp unit and have everything but the adapter for the 1/8 NPT sender. I bought one from a guy named Scott somebody, but it is too big (won't fit). any help, please. thanks so much and Happy Holidays and Merry Christmas.

 

[zzvyb6]

Cant you take the old unit to a hardware store, match the tread there and buy the necessary adaptor based on you findings?

Always works for me.

 

[BruceR]

You might ask over in the Yanmar section.

Bruce

 

[LMTC]

I think I once heard that it's an obscure BPT...British pipe thread. Don't know the numbers. Do know that BPT is used somewhere on the units, as we have run into it and it is all but impossible to match.

 

[chriswheeler]

The addapter came in the metric addapter kit that I bought with the gages. If you go to a Napa store that stocks gages, they should have the kit as well, not much cost.
Chris

 

[California]

This is for you YM2500 owners. does anyone know the exact thread pattern for the water temp sender? I thought it was 16 M X 1.5 but that won't fit. could it be 16 MX1.25? I am trying to fashion a gauge/temp unit and have everything but the adapter for the 1/8 NPT sender. I bought one from a guy named Scott somebody, but it is too big (won't fit). any help, please. thanks so much and Happy Holidays and Merry Christmas.

Here's an old thread with the Sunpro # for the kit that has fit most Yanmars. He said it was 16 M X 1.5.

http://www.tractorbynet.com/forums/yanmar/34144-ym2000-questions-new-owner.html#post385422

 

[boonesmith]

The thread is probably British Pipe Thread Tapered. This thread is used on some of the Japanese autos. You can get the adapters from McMaster-Carr, a large hardware supply. Their website is McMaster-Carr.

I recently used their adapters to put guages on a YM1500D

 

[Underwaterdog]

Look on page 3 of the MCM online catalog. It gives instructions and drawings on how to determine what type of thread you have. Copied from page 3 of MCM catalog:

"While NPT threads are common in the United States, BSP threads are widely used in many other countries.
There are two types of BSP threads: BSPT (British Standard Pipe Taper) and BSPP (British Standard Pipe Parallel). Both styles have the same thread angle, shape, and pitch (threads per inch), however, BSPT threads are tapered and BSPP threads are straight (parallel).
NPT and BSP threads are not compatible due to the differences in their threads. NPT threads are set at a 60ｰ angle and have flattened peaks and valleys; BSP threads are set at a 55ｰ angle and have rounded peaks and valleys.
Most NPT and BSP threads also have different pitches (threads per inch), which are listed below. To determine pitch, either count the number of threads that fall into a 1" span or use a thread gauge for a precise measurement."

Maybe this will help you figure out the thread, since it doesn't seem to be metric. I looked in my paper catalog and online and do not see any adapter bushings, but there are plenty adapter nipples. You could use a close adapter nipple. Once its NPT then you can use a standard NPT female x female reducing bushing. I got one of those adapters from Scott for my 3110d, but sadly haven't had time to even see if it fits.
Boonesmith, is this how you did it or did you find an adapter bushing? If so, what is the part number?

 

[Gizmo36]

I put one on my 3110D .Got all my stuff from Advance I will see if I still have the paper work on it if you want it.

 

[tmar04]

thanks to all for the replies. I, too, had ordered one from Scott, and after 'chasing' the threads with a 16 mm X 1.5 die, it now works fine. I should display a little more patience, I guess. Happy New Year to you guys.