Tach installed on BX

[Anonymous Poster]

I always wondered how fast my PTOs were spinning. Now that I have my Tiny Tach I won't have to guess. Below is an RPM table that I have posted in my garage. The formating isn't too good. I will try to attach a text file with the same info.

Eng
RPM Rear Mid
1200 211 960
1250 220 1000
1300 229 1040
1350 238 1080
1400 246 1120
1450 255 1160
1500 264 1200
1550 273 1240
1600 282 1280
1650 290 1320
1700 299 1360
1750 308 1400
1800 317 1440
1850 326 1480
1900 335 1520
1950 343 1560
2000 352 1600
2050 361 1640
2100 370 1680
2150 379 1720
2200 387 1760
2250 396 1800
2300 405 1840
2350 414 1880
2400 423 1920
2450 431 1960
2500 440 2000
2550 449 2040
2600 458 2080
2650 467 2120
2700 475 2160
2750 484 2200
2800 493 2240
2850 502 2280
2900 511 2320
2950 519 2360
3000 528 2400
3050 537 2440
3100 546 2480
3150 555 2520
3200 563 2560

 

[surfran]

John,

Are these actual measured or from a Kubota source? I assume they would also apply to the BX1800 as well. Thanks for the information.

 

[Anonymous Poster]

Here's your info in table form. I took the liberty of adding an entry for 540 RPM PTO speed, and an abbreviated version that could be laminated and stuck on the dash.

 

[Anonymous Poster]

Yes, the source of the RPM data is Kubota. Below is the Email that they sent me. I used the ratios they sent me to develop the table.

--------------------------------------------------------------
Hello Mr. Engwer. Thank you for contacting Kubota. The answer to your
inquiry is as follows:

The the rear PTO rpm speed is 540 @ 3068 engine rpm speed. Engine rpm
ratio: 5.68 to 1
The mid PTO rpm speed is 2500 @ 3125 engine rpm speed. Engine rpm ratio:
1.25 to 1

John

 

[Anonymous Poster]

TractorlessSacto... Thanks, I will laminate the short list, insert an eyelet and attach it to my key ring.

John

 

[Charliebrn]

Don't you just love this place? /forums/images/graemlins/cool.gif Thanks to you and TOFKAT for the RPM vs PTO table, I'm going to make good use of it. I like the idea of laminating it and hanging it from the key ring too. /forums/images/graemlins/smile.gif

 

[dmartin88]

Installed the tiny tach today using information from this thread, worked fine, no problems and it works as advertised. Decided to use a piece of velcro to hold it to the dash instead of fabricating a plate or drilling holes, seems to hold fine. I painted the transducer grey to match the fuel injector lines as specified in the instructions, guess this is done to offer some weather protection.

Received the invoice in the mail today for the tach, unusual approach to ship the unit without actually receiving payment first but I sent off a check to them today, obviously if they didn't get their money very often, they would have stopped using this approach.

Thanks to all for sharing their install information and pictures as it did simplify and help make this about a 1 hour job.

 

[NY_Yankees_Fan]

Guess what I got for Father’s Day??

YEP a Tiny Tach, so now the questions.

Did you cut the transponder wire, or just coil it up, its about 3 feet too long? I have a gap when the hood shuts, the wires fit in the gap without drilling a hole in the black plastic. Any reason why you choose to drill a hole? The wire for the power fits through the space for the throttle cable, did you just fit it through the space or make another hole? And finally what size male spade did you use to connect to the loose connector above the battery?

Thanks for your help.

 

[dmartin88]

I didn't drill any holes-- ran the transponder to the engine compartment through the hole for the throttle cable and just bundled the extra wire using a small tie wrap to hold the excess. There was also room under the grommet around the lever for the hood release to get the wires through to mount the control unit on the dash. No drilling, cutting or other modifications.

Don't remember the exact size of the spade lug for power, probably 1/8" or so, I had quite a few laying around just found one that fit. Good luck with the install.

 

[Anonymous Poster]

Tom, just coincidently, I just installed my TinyTach yesterday afternoon. I just coiled up the extra line and wire-tied it to the wire harness under the hood. I made a small bracket out of aluminum to mount the tach on the fixed portion of the hood just in front of the dash. Yea, I have to lean forward just a tad to see the reading, but it's not something I'd be concerned with "constantly". Pic attached of the mounted unit.