Husqvarna 529989701 2-Inch Black Venting Fuel Cap – Genuine OEM Replacement Fuel Cap
Part Number: 529989701
Category: Lawn Tractor, Zero-Turn Mower & Fuel System Components
Type: 2-Inch Black Venting Fuel Cap – Genuine OEM Replacement Fuel Cap
The Husqvarna 529989701 2-Inch Black Venting Fuel Cap is a genuine OEM replacement fuel-system component designed for select Husqvarna lawn tractors, garden tractors, zero-turn mowers, and other compatible outdoor power equipment.
Product Specifications
- Part Number: 529989701
- Manufacturer: Husqvarna
- Product Type: Fuel Tank Cap
- OEM Description: Fuel Cap, Black, Venting, 2In
- Alternate Description: 2-Inch Fuel Cap / Vented Gas Cap / Fuel Tank Cap
- Color: Black
- Filler Neck Compatibility: 2.00 Inches
- Cap Type: Vented
- Component Type: Fuel System / Fuel Tank Component
- Function: Seals & Vents the Fuel Tank
- Primary Applications: Lawn Tractor / Garden Tractor / Zero-Turn Mower
- Compatible Brand: Husqvarna
- Additional Applications: Select AYP / Craftsman / Jonsered / McCulloch / Poulan / Poulan Pro / RedMax / Weed Eater Equipment
- Installation Location: Fuel Tank Filler Neck
- Associated Components: Fuel Tank / Filler Neck / Fuel Lines / Fuel System
- Replacement Type: Direct OEM Replacement
- OEM Status: Genuine Husqvarna OEM Part
- Condition: New
- Quantity: 1 Fuel Cap
- Part Number Reference: 529989701
- Alternate Number Format: 529 98 97-01
- Replaces: 529989702
- UPC: 193028243075
The UPC 193028243075 is documented for 529989701, while multiple parts references identify 529989701 as the replacement for previous part number 529989702.
Features & Benefits
- Genuine Husqvarna OEM replacement fuel cap
- Factory-designated Black Venting 2-Inch Fuel Cap
- Designed for compatible 2.00-inch fuel tank filler necks
- Integrated venting functionality
- Helps maintain proper fuel-tank pressure
- Helps prevent excessive vacuum from developing inside the fuel tank
- Provides a secure closure for the fuel filler opening
- Helps reduce fuel leakage when correctly installed
- Helps keep dirt, grass, dust, and debris out of the fuel tank
- Durable construction for outdoor power equipment applications
- Designed for application-specific fit
- Maintains the original equipment fuel-system configuration
- Suitable for select lawn tractors and zero-turn mowers
- Direct replacement for applications requiring 529989701
- Replaces previous OEM part 529989702
- Genuine OEM component rather than an unspecified universal gas cap
2-Inch Filler Neck Compatibility
One of the most important specifications for 529989701 is its compatibility with a:
2.00-Inch Fuel Tank Filler Neck
Husqvarna's official parts documentation identifies 529989701 specifically as the cap for the 2.00-inch filler neck, while other machines may use a different cap for a 2.75-inch filler neck.
This distinction is important because visually similar Husqvarna mowers can use different fuel tanks and caps.
Before ordering, verify the:
- Equipment model
- Product number
- Fuel tank configuration
- Filler-neck size
- OEM fuel-cap part number
Do not assume that every Husqvarna riding mower uses the same fuel cap.
Vented Fuel Cap Function
The 529989701 is a venting fuel cap.
As the engine consumes fuel, the fuel level inside the tank decreases. The venting system allows the tank to equalize pressure rather than developing excessive vacuum.
The cap therefore helps:
- Maintain proper fuel-tank pressure
- Support consistent fuel delivery
- Allow air to enter the tank as fuel is consumed
- Maintain the intended fuel-system operation
- Seal the tank against outside contamination
A malfunctioning vent can potentially interfere with fuel delivery even when the tank contains sufficient fuel.
Fuel Tank Sealing
In addition to venting, the cap closes the fuel tank filler opening.
When correctly installed, it helps protect the fuel supply from:
- Dirt
- Grass clippings
- Dust
- Water
- Outdoor debris
- Other contaminants
Keeping contaminants out of the tank helps protect downstream fuel-system components such as fuel lines, filters, pumps, and carburetion or fuel-injection components.
Replaces Husqvarna 529989702
The 529989701 is documented as the replacement for previous OEM part:
529989702
Messick's identifies 529989701 as replacing 529989702, and Sears PartsDirect likewise lists 529989702 as superseded by 529989701.
Customers searching for either:
- 529989701
- 529989702
- 529 98 97-01
may therefore encounter 529989701 as the current replacement.
Always verify the original equipment configuration before ordering.
Documented Husqvarna Applications
The 529989701 Fuel Cap is documented on numerous Husqvarna riding mower and tractor configurations.
Examples include select:
- Husqvarna GT48DXLS
- Husqvarna GT48XLSI
- Husqvarna GT52 XLS
- Husqvarna GT52XLSI
- Husqvarna GTH-series tractors
- Husqvarna Z146
- Husqvarna Z350 X-Cite
- Husqvarna Z380 X-Cite
- Husqvarna Z54R
- Other compatible lawn tractor and zero-turn mower configurations
Messick's lists the cap as fitting a large number of Husqvarna models, while another OEM parts source specifically identifies it for X-Cite Z350 and Z380 zero-turn mowers.
Exact compatibility should always be verified by model and product number.
Compatible Equipment Brands
Authorized Husqvarna parts references indicate that 529989701 may also fit specific equipment produced under Husqvarna-family brands requiring the same OEM part number, including:
- Husqvarna
- AYP
- Craftsman
- Jonsered
- McCulloch
- Poulan
- Poulan Pro
- RedMax
- Weed Eater
This does not mean the cap fits every product manufactured under these brands. Compatibility depends on the specific equipment and fuel-tank configuration.
Common Reasons for Replacement
Replacement of the 529989701 Fuel Cap may be appropriate if the original cap has:
- Been lost
- Cracked
- Broken
- Become difficult to tighten
- Developed damaged threads or retaining surfaces
- Developed venting problems
- Become excessively worn
- Developed fuel leakage
- Sustained impact damage
- Become distorted
- Developed a damaged sealing surface
- Become contaminated
- No longer securely closes the fuel tank
A missing or damaged fuel cap should be replaced before normal equipment operation.
Possible Signs of a Fuel Cap Venting Problem
Depending on the fuel system, a restricted or malfunctioning fuel-cap vent may contribute to:
- Engine stalling after operating for a period of time
- Fuel starvation symptoms
- Engine losing power
- Difficulty restarting
- Irregular fuel flow
- Vacuum developing inside the fuel tank
These symptoms can also be caused by:
- Restricted fuel filter
- Damaged fuel line
- Fuel pump problems
- Carburetor problems
- Fuel-injection problems
- Contaminated fuel
- Tank outlet restrictions
The fuel cap should therefore be considered one part of the complete fuel system.
Fuel Cap Inspection
Inspect the cap periodically for:
- Cracks
- Physical damage
- Damaged sealing surfaces
- Excessive wear
- Dirt or debris
- Vent blockage
- Distortion
- Fuel residue around the filler opening
Also inspect the fuel tank filler neck for cracking or deformation.
A new cap may not seal correctly if the tank's filler neck itself is damaged.
Installation
Installing the 529989701 Fuel Cap is generally straightforward:
- Shut off the engine.
- Allow hot engine components to cool.
- Position the equipment on a stable surface.
- Remove the existing fuel cap.
- Inspect the 2-inch filler neck.
- Clean dirt and debris from around the opening.
- Position 529989701 on the filler neck.
- Secure the cap properly.
- Verify that the cap is seated correctly.
- Inspect for leakage before operating the equipment.
Avoid allowing grass, dirt, or other contaminants to enter the open fuel tank during replacement.
Important Notes
- Verify compatibility with your exact equipment model, product number, serial number, fuel tank, and production revision before ordering.
- Match part number 529989701 directly with your equipment's OEM illustrated parts diagram.
- The OEM description is “Fuel Cap, Black, Venting, 2In.”
- The cap is designed for a 2.00-inch filler neck.
- Do not confuse this cap with Husqvarna caps designed for 2.75-inch filler necks.
- Husqvarna specifically documents different cap part numbers for 2.00-inch and 2.75-inch filler-neck configurations.
- 529989701 replaces previous part number 529989702.
- UPC is 193028243075.
- This is a vented fuel cap.
- Do not substitute a non-vented cap where a vented cap is required.
- Do not select a replacement cap solely by color or approximate diameter.
- Fuel caps can differ in filler-neck size, thread or retention design, sealing configuration, vent design, and equipment application.
- Use 529989701 as the primary fitment reference.
- Inspect the filler neck before installing the replacement cap.
- A cracked, warped, or damaged filler neck may prevent the cap from sealing correctly.
- Keep the filler opening clean during installation.
- Do not allow dirt, grass clippings, or water to enter the fuel tank.
- Do not modify or intentionally block the cap's venting system.
- Make sure the cap is properly secured before operating or transporting the equipment.
- Never refuel equipment while the engine is running.
- Allow hot engine and exhaust components to cool before refueling.
- Keep fuel away from ignition sources, sparks, and open flames.
- Clean spilled fuel before starting the equipment.
- Replace a leaking or physically damaged fuel cap promptly.
- This listing is for one Husqvarna 529989701 2-Inch Black Venting Fuel Cap only unless otherwise specified. Fuel tank, fuel lines, filters, pumps, fittings, and other fuel-system components are sold separately unless explicitly included.
- Match Husqvarna 529989701 and the 2.00-inch filler-neck requirement with your equipment's OEM documentation before ordering to ensure proper fitment.
