Description
Hustler OEM 350884 Deck Idler Guide Slide
The Hustler 350884 Deck Idler Guide Slide serves as the guide, tensioner and mount for the Idler Pulley and Select Mower Deck Belt on your Mower’s Cutting Deck. Its purpose is to maintain correct belt tension and allow smooth idler movement as the Deck Belt Cycles through Operation. Proper belt tension prevents slippage, reduces wear on Pulleys and Belts, and Preserves cutting quality. This slide works with the Mower Deck Idler Spring and Pulley assembly allowing movement which enables load and tension forgiveness and ensure long, trouble-free life of the drive belt system.
Important Note: Select Family Models Associated with 350884 Will Require a Close Relative to Avoid Confusion Below is A list of Families and the Models that are Exempt from using 350884 and Will use Part Number 129242-1 in its Place. Spring Hook-up will be different - Refer to the Part Number to be Redirected.
Image of 129242-1 Spring Tab Erea

Refer to Part Number 129242-1 Models: (X-ONE - 943977) - (X-RIDE - 944868) - (Super Z HD- 943977) - (Super 104 - 944058, 944066)
- OEM Part Number: 350884
- Part Name: Deck Idler Guide Slide
- Brand: Hustler OEM
- Category: Deck Parts – Idler & Tension Components
Fits These Hustler Models
* Verify your model number in the Model Fit Chart Below before ordering - variations may occur depending within Model and Families. If your Model is not List Feel Free to Contact us with your Model Number to Verify Correct Usage for you Model Number.
Fastrack, Fastrack SD, X-ONE, X-ONEi, Super Z, Super Z HD, Super 104, Super ATZ,
Super Z - Cat Diesel, Diesel Z, Mini Z, Super Mini Z (Side Discharge Models Only Except for X-ONE & Super 104 Models)
Installation Directions
- Park mower on a **flat, level surface**. Engage parking brake and shut off engine.
- Disconnect spark plug wire to prevent accidental start.
- Lower the Mower Deck to access the idler assembly
- Locate the existing Idler Guide Slide on the Mower Deck where the idler pulley and spring mount.
- Remove belt from the idler pulley by relieving tension between the Idler Pulley and the Mower Deck Belt Via the Chain Used to Retain Tension.
- Remove worn or damaged deck Idler Guide Slide (350884). Retain hardware if re-using.
- Inspect associated components - idler pulley, spring and UHMW wear pads/rails (UHMW Wear Pad/Rails are the Wearable Component of the Slide and are Recommended to be Replaced if Replacing the Slide) - replacing as needed.
- Install the new 350884 Guide Slide in original orientation. Torque fasteners per factory spec (see service manual for torque values).
- Reposition idler pulley and spring onto the slide.
- Reinstall belt over the Pulley or Pulleys and verify proper belt seating on all pulleys.
- Tension Belt Via the spring and chain using the recommended Spring Measurements.
- Raise deck and reconnect spark plug wire.
- Perform a test run - verify smooth idler travel and correct deck belt operation - Visually Recheck Mower Deck Belt to Unsure that it Remained in Correct Alignment after Operation.
Spring Measurement & Belt Tension Notes
For correct deck belt tension, many Hustler deck assemblies use a **spring measurement from outside hook to outside hook** spring measurement from hook to hook on models that use 781302 Spring should be 9.3 in. - 10.0 in. Review the Image Below for example of Measurement. (For Additional Spring Measurement Length Refer to manufacturer notes in Mower Deck Belt routing section of Service Manual).

Installation Tips & Best Practices
- Always route the deck belt as shown in your mower’s owner or service manual before installing the idler slide (For Additional Mower Deck Belt References on Correct Mower Deck Belt Routing, refer to the Images under Correct Mower Deck Belt Part Number for your Particular Model on Hilly Ridge Website - Correct Part Number Can be Found on Hilly Ridge Website by Typing Part Number in the Search tab or Typing Mower Deck Belt for Model ----- in the Search Tab).
- Inspect all pulleys for smooth rotation and replace if they Wobble Excessively or the Bearings Seem Rough.
- Use proper belt tension measurement (spring length and pulley travel) to avoid belt slip under load.
- Apply Small Amount of Grease or Lubricant to the Idler Guide Slide and UHMW Rail While Re-assembling.
Related & Wear-Item Parts
These parts are commonly serviced or recommended at the same time:
- 781302 - Idler/Slide Tension Spring (Standard for all Models).
- Idler Pulley (6″ or 5″ – Depending on Mower Deck Width/Model/Family - to Find Correct Mower Idler Part Number for your Particular Model on Hilly Ridge Website - Correct Part Number Can be Found on Hilly Ridge Website by Typing Part Number in the Search tab or Typing Mower Deck Idler for Model ----- in the Search Tab - Review the Idler Usage Charts and always to Make Sure your Model Number is listed in the Model in the Model Fit Chart).
- UHMW Wear Slides / Wear Pads (Specific to Mower Deck Width/Model/Family - to Find Correct Mower Deck UHMW Wear Slide/Wear Pad Part Numbers for your Particular Model on Hilly Ridge Website - Correct Part Number Can be Found on Hilly Ridge Website by Typing Part Number in the Search tab or Typing Mower Deck UHMW for Model ----- in the Search Tab - always to Make Sure your Model Number is listed in the Model in the Model Fit Chart).
- Deck Belt (Specific to Mower Deck Width/Model/Family - to Find Correct Mower Deck Belt Part Number for your Particular Model on Hilly Ridge Website - Correct Part Number Can be Found on Hilly Ridge Website by Typing Part Number in the Search tab or Typing Mower Deck Belt for Model ----- in the Search Tab - always to Make Sure your Model Number is listed in the Model in the Model Fit Chart).
Specification
|
Product Number: |
350884 |
|
Brand: |
Hustler |
|
Length: |
10.20 IN |
|
Width: |
4.25 IN |
|
Height: |
2.40 IN |
|
Weight: |
2.480 LB |
Model Fit:
* 350884 May Be Used on Additional Models/Families like Deisel Z & X-One Models Due to Lack of Information and Details - Hilly Ridge Will Continue to MANUELLY Improve the Model Fit Chart with Time - If you Have any Questions on Exact Fit Feel free to Message or Call us.
X-ONE
(Models 2011 and Later are Listed - Models Listed Prior To 2011 Will Not Be Listed If Applicable)
X-ONEi
(Models 2011 and Later are Listed - Models Listed Prior To 2011 Will Not Be Listed If Applicable)
Super Z
(Models 2011 and Later are Listed - Models Listed Prior To 2011 Will Not Be Listed If Applicable)
929927, 929935, 929943, 929950, 930875, 931048, 932012, 932020, 932038, 932046, 932129, 932137, 932970, 932988, 933457, 933929US, 934232, 934240, 934265, 934273, 934281, 934984US, 934992, 935007, 935015US, 935031, 935049, 935056US, 936872, 936880, 936898US, 936922, 936930, 936948US, 936989, 937714, 937722, 937730, 938985, 938993, 941138, 941146, 941153, 941161, 941179, 941187, 941377, 941385, 942342, 942771, 942763, 942805, 942813, 942821, 942839, 942854, 942870, 942888, 942896, 942920, 943852, 943860, 943886, 943894, 943928, 943936
Super Z Hyper Drive
(Models 2011 and Later are Listed - Models Listed Prior To 2011 Will Not Be Listed If Applicable)
932145, 932152, 932160, 932996, 933002, 934323, 934349, 934687, 934695, 934919, 934927, 934943, 934950, 934968, 936997, 937003, 937029, 937037, 937045, 937110, 939561, 939579, 939587, 939595, 941229, 941237, 941252, 941260, 941278, 941294, 941302, 941310, 941534, 941542, 942219, 942227, 942235, 942243, 942250, 942359, 942979, 942995, 943001, 943019, 943027, 943050, 943068,943969, 943993, 943985, 944017, 944041
Super 104
(Models 2011 and Later are Listed - Models Listed Prior To 2011 Will Not Be Listed If Applicable)
Diesel Z
(Models 2011 and Later are Listed - Models Listed Prior To 2011 Will Not Be Listed If Applicable)
Fastrack & Fastrack SD
(Models 2011 and Later are Listed - Models Listed Prior To 2011 Will Not Be Listed If Applicable)
Mini Z & Super Mini Z
(Models 2011 and Later are Listed - Models Listed Prior To 2011 Will Not Be Listed If Applicable)
