Murray G2250030 Snowblower Parts

A neighbor gave me an old snowblower she didn’t need, a green 22″ Murray 5HP model. A label on the back identifies it as model number G2250030. I’ve been trying to fix it up and get it running on the side, but it’s been a bit of a challenge. I cannot for the life of me find a manual. at least has some parts diagrams. From there and some Amazon exploration, I’ve found some replacement parts. Note that I’ve just now ordered these; I’ll come back and update this to reflect whether the parts are correct or not.

Shear Pins

As best as I can tell, these are identified as part 9524, “Screw, 1/4-20×1.75” and part 3943, “spacer, sleeve” in the auger housing assembly parts diagram.

I think these are what you want.

This eBay listing suggests that parts 1501216 (and 1501216MA), 9524MA, and 3943MA are equivalent, and that Craftsman used the 9524 part number as well.

Whatever you buy, make sure you get the spacer. Some reviews on other parts (not linked here) indicate that people cannot find the spacer individually.


I plan to replace both drive belts while I have the thing apart.

The drive belt (turns the wheels) is part 579932, described as “Belt V 3L 33.13LG”. I have this in my Amazon cart right now. (Note that the “MA” prefix is often added to Murray part numbers, so it’s also known as 579932MA.)

The auger drive belt is 581264, described as “Belt, V 4L 35.23LG”. I have this on order.

Auger throttle cable

The cable to engage the augers is the faulty part I’m actually trying to replace. It’s part 340373, “Cable, auger.” It appears that this part number has been replaced by 761400MA, which is also apparently equivalent to 760150, 761153. See this part, which is running about $38.

What is repmgr on a Mac?

I now have an IT-managed Mac at work, which means that I had to cede a little control and allow weird stuff I don’t understand to run on it.

I was disturbed today to find a root-owned process, repmgr, using a bunch of CPU. Some quick Googling suggests that repmgr is for Postgres replication, which is problematic because I don’t use Postgres and don’t have it installed.

It turns out that there’s another, unrelated repmgr, though! /Applications/ is the path to the running executable for me. repmgr is also the name of a component of Confer / Carbon Black, some sort of enterprise security software for Macs. I haven’t had the chance to figure out exactly what it does, but based on some of the strings in it, I suspect it’s short for “Reputation Manager.”

WR Communications Manuals

Someone on the repeater-builder mailing list mentioned that they were looking to get rid of a bunch of manuals for old radio equipment by WR Communications, Ltd., a defunct two-way radio company from Canada. (See their Industry Canada listing here.)

For some reason, despite having not previously heard of the company, I couldn’t bear to see a bunch of documentation get thrown away, so I arranged to have them shipped to me. I’m planning on scanning all of them in and OCR’ing them. Even with a fast scanner with a document feeder, it’s going to take a bit.

I’m currently in possession of the following manuals. The last number is seemingly a document number they used for some purpose.

  • 9T90B10 UHF Transmitter (72)
  • RTL-54 Trunk Adapter (21)
  • 3R90B VHF Rx Instruction Manual (60)
  • 9R90B UHF Receiver (71)
  • RTA-54 CTCSS Encoder/Decoder (18)
  • 3R93B VHF Receiver (77)
  • WR Type Number Designation Scheme (Rackmount 90 Series) (79)
  • 3T93A6 UHF Transmitter (75)
  • 9R93A UHF Receiver (76)
  • RCP-54 DC Power Control, Sub-Assembly No. 14.1284 (80)
  • DTMF Decoder Latch Board (81)
  • M-90 Test Set Schematic Diagram (12)
  • Photos (39)
  • RIA-54 Intercom Adapter (16)
  • RLA-54A DC Line Adapter (17)
  • 9T90B4 UHF Tx Instruction Manual (61)
  • 9T90B4 UHF Tx Instruction Manual (58)
  • 3T90B4 VHF Tx Instruction Manual (59)
  • WR-194-70W Power Amplifier Section Schematic (27)
  • Repeater Control RCL-54B Sub-Assembly No. 14.0571 (?)
  • 3T90B-15 VHF Transmitter (70)
  • Rack Mount Station Power Supply Schematic Diagram (9)
  • 95 Rack Mount PA Power Supply Schematic Diagram (13)
  • TR-100 VHF Antenna Switch Schematic Diagram (22)
  • TT-4 and TT-4A Time Out Timer Lockout (23)
  • WR-194 Receiver Module (24)
  • WR-194 Transmitter Module (25)
  • WR-194-4W Transmitter Module (26)
  • 9T95A50 Power Amplifier Section Schematic Diagram (55)
  • Rack Mount Station TX Module WR-454 (44)
  • A folder with miscellaneous DTMF latch decoder schematics and info
  • Unlabeled folder for 9R90A-0 Receiver Module
  • WR-494 Transmitter Module (36)
  • A bound manual containing:
    • 9T90B4 UHF Transmitter Instruction Manual
    • 9R90C UHF Receiver Assembly No. I2.0283 (12.0283 ?)
    • Repeater Control RCL-54B Sub-Assembly No. 14.0571
    • CTCSS Encoder-Decoder RTA-54B Sub-Assembly No. 14.0581
    • CTCSS Tone Control RTC-54B Sub-Assembly No. 14.0601

Low-Overhead Linux Networking

I want to do more posts here that are quick roundups of interesting things I’ve read, rather than rambling commentary.

  • DPDK, the Data Plane Development Kit, permits a userspace application in Linux or BSD to bypass the kernel and directly interact with a network card. Handling interrupts to pass data from a 100 Gbps network card through the kernel apparently performs poorly.
  • Selectel’s “Introduction to DPDK: Architecture and Principles” looks like a detailed walkthrough of how it works. (I only skimmed it on the train tonight though.)
  • is a Linux Foundation project implementing a software dataplane employing vector packet processing (VPP). Its What is VPP? page is a good intro.
  • networking-vpp brings support to OpenStack networking.
  • Ligato and Contiv-VPP bring VPP to Kubernetes (et al.)
  • I’ve run up against mentions of YANG, which is “Yet Another Next Generation” DSL for modeling network data.
  • Intro to networking-vector packet processing is based on a 2018 FOSDEM talk. The Youtube video really helped things “click” for me.