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STIHL WB05 704 2100 OEM 72" Main Deck Belt
The STIHL WB05 704 2100 Main Deck Belt is a genuine OEM STIHL replacement belt for select STIHL RZ zero-turn mowers with 72" mower decks. This belt is listed in the 72" Mower Deck - Pulleys, Belts & Idler Arms section for compatible RZ 972 models.
This belt is described as BELT, 5V/SPB, 156.70 EL, LG ARAMID, WRPD. It is built for mower deck drive use and is designed to match the correct belt profile, length, pulley layout, and load requirements for compatible STIHL 72" deck applications.
Always verify your full STIHL mower model, deck size, original belt part number, belt routing, and parts diagram before ordering. Mower deck belt fitment can vary by deck size, model, and pulley layout.
Product Details
| Brand | STIHL |
|---|---|
| Part Number | WB05 704 2100 |
| Product Type | Main Mower Deck Belt |
| OEM Description | Belt, 5V/SPB, 156.70 EL, LG Aramid, WRPD |
| Deck Size | 72" |
| Common Deck Section | 72" Mower Deck - Pulleys, Belts & Idler Arms |
| Compatible Model Families | STIHL RZ 972 models where specified |
| OEM / Aftermarket | Genuine OEM STIHL replacement part |
Compatible STIHL Model References
STIHL WB05 704 2100 is listed for the following 72" mower deck applications:
- STIHL RZ 972.0i - 72" Mower Deck, Pulleys, Belts & Idler Arms
- STIHL RZ 972.0 K - 72" Mower Deck, Pulleys, Belts & Idler Arms
- STIHL RZ 972.0i K - 72" Mower Deck, Pulleys, Belts & Idler Arms
Important: Confirm your mower has the correct 72" deck and that your STIHL parts diagram lists WB05 704 2100 before ordering. Do not order by model family or deck size alone.
Key Features
- Genuine OEM STIHL 72" main mower deck belt
- Part number WB05 704 2100
- OEM description: Belt, 5V/SPB, 156.70 EL, LG Aramid, WRPD
- Designed for select STIHL RZ 972 72" mower deck applications
- Used in the mower deck pulleys, belts, and idler arms system
- Helps restore proper deck drive and blade operation
- Factory-correct replacement when listed in your STIHL parts diagram
Why Choose an OEM STIHL Deck Belt?
Mower deck belts are critical to blade drive performance. A worn, stretched, cracked, or incorrect belt can cause slipping, poor cut quality, belt noise, overheating, premature wear, or loss of blade operation.
Genuine STIHL mower deck belts are built to match the correct deck routing, pulley profile, belt length, and load requirements for compatible STIHL mower decks. When your parts diagram lists WB05 704 2100, this OEM belt is the correct replacement for that application.
- Correct OEM fit when specified by STIHL
- Designed for compatible 72" mower deck drive systems
- Helps maintain proper belt tension and blade speed
- Reduces guesswork compared to universal belts
- Recommended for maintaining STIHL mower cutting performance
When to Replace Your Mower Deck Belt
Replace the deck belt if it is cracked, glazed, frayed, stretched, slipping, or damaged. A failing belt can reduce blade speed and create uneven cutting performance.
- Belt is cracked, frayed, glazed, or worn
- Belt slips or squeals under load
- Blades do not maintain proper speed
- Cut quality is uneven or inconsistent
- Belt jumps off pulleys or does not track correctly
- Deck belt was damaged by debris or pulley failure
- Parts diagram lists STIHL WB05 704 2100 for your mower
Important Fitment Notes
- This is a 72" main mower deck belt for select STIHL RZ 972 models
- Fits select RZ 972.0i, RZ 972.0 K, and RZ 972.0i K applications where specified
- Verify the original belt part number before ordering
- Do not order by deck size alone
- Confirm belt routing, pulley layout, and idler arm setup
- Some decks may use more than one belt, so verify whether you need the main belt, secondary belt, or both
- Inspect pulleys, idlers, tensioner arms, and spindle bearings when replacing belts
Pre-Purchase Checklist
Before ordering STIHL WB05 704 2100, confirm:
- Your full STIHL mower model number
- Your mower has the 72" mower deck
- Your original deck belt part number
- Your parts diagram lists WB05 704 2100
- Your belt routing matches the 72" deck diagram
- Your pulleys, idlers, and tensioner arm are in serviceable condition
Installation and Service Notes
Deck belt replacement should be performed with the mower turned off, key removed, parking brake engaged, and all moving parts stopped. Follow the STIHL service instructions and belt routing diagram for your exact mower.
- Take a photo of the belt routing before removing the old belt
- Inspect idler pulleys, spindle pulleys, and tensioner components
- Replace worn or noisy pulleys before installing a new belt
- Make sure the belt is seated correctly in all pulley grooves
- Verify proper tension and deck engagement after installation
- Run and recheck belt tracking before returning the mower to service
Part Number / Search Terms
STIHL WB05 704 2100 may also be searched as:
- STIHL WB05 704 2100
- WB05 704 2100 deck belt
- STIHL WB05 704 2100 belt
- STIHL 72" main deck belt
- STIHL 72 inch mower deck belt
- STIHL RZ 972 deck belt
- STIHL RZ 972.0i deck belt
- STIHL RZ 972.0 K deck belt
- STIHL RZ 972.0i K deck belt
- STIHL zero turn mower deck belt
- STIHL OEM mower belt
- STIHL 5V/SPB 156.70 EL belt
- STIHL aramid wrapped deck belt
Frequently Asked Questions
What is STIHL WB05 704 2100?
STIHL WB05 704 2100 is a genuine OEM 72" main mower deck belt used on select STIHL RZ 972 zero-turn mower deck applications.
What models does this deck belt fit?
This belt is listed for select STIHL RZ 972.0i, RZ 972.0 K, and RZ 972.0i K models with 72" mower decks where specified in the parts diagram.
Is this belt for a 72" deck?
Yes. This belt is listed for compatible STIHL 72" mower deck applications.
Is this the main deck belt?
Yes. This listing is for the STIHL 72" main mower deck belt used in the pulleys, belts, and idler arms section.
How do I know if this belt fits my mower?
Verify your full mower model number, deck size, original belt part number, belt routing, and STIHL parts diagram before ordering.
Is this an OEM STIHL belt?
Yes. This listing is for a genuine OEM STIHL replacement mower deck belt.
P&P Small Engines stocks genuine STIHL mower belts, blades, pulleys, idlers, spindles, filters, oils, accessories, and OEM replacement parts for homeowners and professionals.
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