The Best Snow Blower Gas Cap
Find the right fuel cap for your snow blower. Our research covers compatibility, venting, and durability for popular brands including Tecumseh, Ariens, and MTD.
By Harry
Updated October 14, 2026
Choosing the right snow blower gas cap may seem minor, but a secure seal prevents fuel leaks, keeps debris out of the tank, and maintains proper air pressure for consistent engine performance.
A faulty or mismatched cap can lead to hard starting, stalling, or dangerous spills, especially when you are clearing heavy, wet snow.
Whether you are replacing a lost cap or upgrading a worn one, finding a part that fits your specific engine model is essential.
We have researched dozens of fuel caps, analyzing specifications, expert repair guides, and verified buyer feedback to score each option on our 0, 10 SRW Score.
This guide highlights the best snow blower gas cap options for popular brands such as Tecumseh, Ariens, MTD, and Briggs & Stratton. Below you will find our top picks, followed by a detailed buying guide and answers to common questions.
Tendparts 37845 Tecumseh Fuel Cap
A direct replacement metal fuel cap for a wide range of Tecumseh snow blower engines. It fits many models including H35, HM80, and OH195EA with a straightforward install, though one verified buyer noted the threads may bind on certain tanks.
Pros
- Compatible with many Tecumseh snow blower engine models (H35, HM80, OH195EA, etc.)
- Metal construction with chrome finish for durability
- Easy to install as a direct replacement
Cons
- Thread fit may be inconsistent on some units, reported binding after two turns
Lssapr 951-10649 Gas Cap Replacement
This replacement fuel cap from Lssapr is designed to fit a wide range of Troy-Bilt, Craftsman, and MTD snow blowers and tillers, including 206cc and 208cc engines. Its durable plastic construction with a sealed gasket aims to prevent leaks and withstand outdoor conditions. Installation is tool-free, making it a convenient option for quick maintenance.
Pros
- Wide compatibility with many Troy-Bilt, Craftsman, MTD models and part numbers
- Durable waterproof plastic with sealed gasket resists sun and frost
- Tool-free twist-on installation saves maintenance time
- Leakproof design helps maintain stable fuel pressure
Cons
- Requires careful part number matching to ensure a proper fit
DVPARTS 35355 Tecumseh Fuel Cap
This replacement fuel cap from DVPARTS is designed to fit a wide range of Tecumseh engines, including H35, H40, HM80, HM90, and many others used in lawn mowers and snow blowers. It features a simple twist-on closure and a durable plastic construction, as reflected in its 4.0 star rating from 68 verified buyers. If you need a direct OEM equivalent replacement, this cap is a solid choice.
Pros
- Compatible with many Tecumseh engine models for lawn mowers and snow blowers
- Twist-on design for easy installation
- Backed by a 1-year manufacturer warranty
Cons
- Plastic construction may not be as durable as metal caps
- Only fits specific Tecumseh models listed (not universal)
Celliparts 125-051 Fuel Cap for Tecumseh
A reliable aftermarket fuel cap designed to replace original caps on many Tecumseh Premier Series engines used in snow blowers and lawn mowers. Based on customer feedback, it offers a precise fit and solid performance for older equipment.
Pros
- Compatible with a wide range of Tecumseh engine models, including H40, H35, HM90, and more
- Positive customer reviews with a 4.4-star rating from 23 verified buyers
- Lightweight and compact design at under 1 ounce for easy handling
Tecumseh 37845 Fuel Cap
This OEM fuel cap from Tecumseh is a direct replacement for compatible lawn mower engines, built with stainless steel for corrosion resistance. Its twist-on closure offers a secure, tool-free fit, and the high customer rating reflects consistent reliability for maintaining fuel system integrity.
Pros
- Genuine OEM part ensures correct fit and performance
- Stainless steel construction resists rust and wear
- Twist-on design for quick, secure installation
- High customer rating (4.7 out of 5 stars from nearly 600 reviews)
Cons
- Compatibility limited to Tecumseh engines and certain lawn mower models
- Red color may not match all equipment aesthetics
Rolvyns 751-0603B 2-1/4 Inch Vented Gas Cap
An aftermarket replacement gas cap compatible with a wide range of lawn mowers, tractors, and outdoor power equipment. Based on specs and buyer feedback, its vented design supports proper fuel system function and fits 2-1/4 inch fuel tank openings. Best suited for those seeking an affordable, universally fitting cap from a brand with solid ratings.
Pros
- Compatible with many major brands including Husqvarna, Troy-Bilt, MTD, and John Deere
- Vented cap helps maintain correct fuel system pressure
- Backed by a 2-year manufacturer warranty
Cons
- Plastic construction may be less durable than metal alternatives
- Universal fit requires careful measurement of the fuel tank neck before purchase
- Aftermarket part, not an original equipment manufacturer (OEM) component
TECUMSEH PARTS 37844 Fuel Cap
This genuine OEM fuel cap from Tecumseh is a direct replacement for specific Tecumseh model engines found on lawn mowers. Made of metal with a screw-in design, it offers a secure fit and a high customer satisfaction rating based on hundreds of verified buyer reviews.
Pros
- Genuine OEM part ensures proper fit and compatibility with specific Tecumseh engines.
- Metal construction provides durability compared to plastic alternatives.
- Very high average rating from over 280 customer reviews indicates strong reliability.
Cons
- Vehicle-specific fit requires confirming model, spec, and serial numbers for compatibility.
- May not fit non-Tecumseh or universal applications.
HXKDJ 07500112 Fuel Cap for Ariens & Sno-Tek
This replacement fuel cap from HXKDJ is designed to fit Ariens AX 136cc, 208cc, and 254cc engines as well as Sno-Tek snow blowers. It restores proper coverage to the fuel tank, keeping out debris and moisture. The twist-on installation requires no special tools.
Pros
- Restores fuel tank coverage to prevent dust and moisture ingress
- Easy twist-on installation with no tools required
- Includes retaining tether to prevent loss
- Compatible with multiple Ariens and Sno-Tek engine models
Cons
- Compatibility limited to specific Ariens and Sno-Tek models; verify before purchase
- No manufacturer warranty included
Ariens 07500112 Fuel Cap for Snowblower
This OEM replacement cap is designed specifically for Ariens and Sno-Tek snowblowers, offering a direct twist-on fit. Made from stainless steel with a black finish, it consistently earns high marks from owners for reliability and ease of use. A straightforward, no-fuss part for those needing a factory-grade fuel cap.
Pros
- Genuine OEM part ensures exact fit and compatibility with listed Ariens and Sno-Tek snowblower models
- Stainless steel construction resists corrosion and wear
- High customer rating (4.6 out of 5 stars from over 300 reviews) reflecting dependable performance
Cons
- Limited to specific snowblower models; not universal for all fuel tanks
- No additional features beyond a standard cap (e.g., no locking mechanism or vent control)
TSYCWQ Replacement Gas Cap (Fits 951-12533)
A replacement gas cap designed for Craftsman Troy Bilt MTD and Yard Man equipment. It features a leak-proof seal to prevent fuel evaporation and uses durable plastic that withstands outdoor conditions. Based on user feedback it offers straightforward installation suitable for most homeowners.
Pros
- Leak-proof design reduces fuel waste and fumes.
- Made of durable plastic resistant to weather and wear.
- Compatible with multiple brands and part numbers.
SUKATC 37845 35355 Fuel Cap for Tecumseh
This replacement fuel cap from SUKATC fits a wide range of Tecumseh snow blower engines. Its red painted finish and high-quality construction help prevent fuel evaporation and keep contaminants out. The tool-free twist-on design makes replacing a worn or missing cap simple.
Pros
- Durable high-quality materials prevent fuel evaporation and block pollutants.
- Tool-free twist-on installation for quick replacement.
- Compatible with many Tecumseh snow blower engine models.
- 12-month manufacturer warranty included.
Cons
- Limited to specific Tecumseh engine models; verify compatibility before purchase.
- Only one cap per package; no extra parts included.
Mengfan 07500112 Fuel Cap for Ariens Sno-Tek
This replacement fuel cap fits multiple Ariens Sno-Tek and LCT engine models, addressing lost or cracked caps. Its twist-on installation and built-in tether make swapping quick and secure, ideal for owners wanting a direct OEM alternative.
Pros
- Exact fit for several Ariens Sno-Tek models and LCT engines
- Replaces multiple OEM part numbers (Ariens 07500112, 20001131, LCT 03011)
- Integrated tether prevents cap loss in snow
- Simple twist-on installation with click-close seal
- Durable weather-resistant plastic construction
Cons
- Compatibility limited to specific Sno-Tek and LCT engine models
- Only available in black
M143291, LG397974, Gas Cap Replacement Compatible
M143291, LG397974, Gas Cap Replacement Compatible with B&S, Cr-ftsm-an, La-wn-By Push Lawn Mower, Snow Blowers 2pcs Compatible with Craf-tsm-an, Lawn-B-y, T-ro Push Lawn Mower, Snow Blowers Replaces Part Numbers: M143291, LG397974
Oregon 07-314 Fuel Cap for 1.5-Inch Opening
If you need a direct replacement for a Tecumseh 35355 fuel cap on a plastic tank, this Oregon cap is a practical choice. Based on specifications and user feedback, it fits most 1.5-inch openings with a simple twist-on design and holds a solid 4.4-star rating from over 350 reviews.
Pros
- Replaces Tecumseh part 35355 for exact compatibility
- Fits most plastic fuel tanks with a 1.5-inch opening
- Easy twist-on installation with durable plastic construction
- Universal fit for many lawn mowers and outdoor power equipment
Cons
- Only works with 1.5-inch diameter openings on plastic tanks, not adjustable for other sizes
- May not fit all fuel tank shapes or brands despite universal claim
ReliableAftermarketParts 07500112 Fuel Cap
If you need a replacement fuel cap for specific Ariens Sno-Tek or AX snow blower models, this aftermarket part from ReliableAftermarketParts is a direct-fit option. It includes a tether and matches OEM part number 07500112.
Pros
- Compatible with a wide range of Ariens Sno-Tek and AX models
- Includes a tether to prevent cap loss
- Direct replacement for OEM part 07500112
Ariens 07531800 OEM Fuel Tank Cap
This OEM fuel tank cap from Ariens is a direct replacement for several snowblower models including the ST524 and ST824 series. Users report that it fits older machines perfectly and stops fuel evaporation thanks to its twist-on closure. While one customer mentioned the product image differs slightly, the cap functions as intended.
Pros
- OEM part number 07531800 ensures exact fit for compatible Ariens snowblowers
- Twist-on closure provides a tight seal against evaporation
- Chrome exterior finish adds durability
Cons
- One reviewer noted that the cap's appearance does not match the product photo
Best Snow Blower Gas Cap Buying Guide
Compatibility and Engine Fit
Not all gas caps are universal. Most snow blowers use caps designed for a specific engine brand and displacement. Tecumseh engines (H35, H40, HM80, HM90, etc.) require caps like the 37844, 37845, or 35355. Ariens models with AX or Sno-Tek engines use part 07500112.
MTD/Craftsman/Troy-Bilt units often call for 951-12533 or similar. Before purchasing, always confirm your engine model and the original part number stamped on the old cap. Mismatched threads or height can cause a poor seal or fitment issues.
For a deeper look at engine maintenance, see our guide on the best snow blower for every home.
Many aftermarket caps list compatibility across multiple OEM part numbers. However, slight differences in gasket thickness or vent design may affect performance. Stick to caps that explicitly match your engine series or original part to avoid frustration.
Vented vs. Non-Vented Caps
Most snow blower gas caps are vented to allow air into the tank as fuel is drawn out, preventing a vacuum that can starve the engine. Non-vented caps are rare but may appear on older equipment.
If your machine runs fine with the cap loose but stalls when tightened, you likely need a vented cap. Check the cap top for a small hole or check valve.
Replacement caps from reputable manufacturers clearly label whether they are vented. For more on snow blower upkeep, read our end of season snow blower deals article.
Using a non-vented cap on a vented system can cause fuel delivery problems. Conversely, a vented cap on a sealed system may leak if the engine is not designed for it. Always verify the venting requirements for your specific model.
Material and Durability
Fuel caps are typically made of high-density plastic, with a rubber or neoprene gasket for sealing. Over time, the gasket can dry out, crack, or deform, leading to leaks.
Some caps include a tether to keep the cap attached to the tank, reducing the chance of loss. Look for caps with UV-resistant plastic to prevent brittleness from sun exposure if your machine is stored outdoors.
Caps with metal threads are more durable than all-plastic threads but are heavier and more expensive. For harsh winters, a robust cap is essential; check our recommendations for best snow blower for powder snow.
Price is not always an indicator of longevity. Some low-cost aftermarket caps perform well for years, while overpriced OEM caps may fail prematurely. We evaluate gasket quality, thread finish, and overall build in our scoring.
OEM vs. Aftermarket Options
OEM (original equipment manufacturer) caps are made by or for the engine builder. They guarantee exact fit, correct venting, and the same materials as the original. However, they often cost two to three times more than aftermarket alternatives.
Aftermarket caps from reputable brands like Oregon or DVPARTS can be just as reliable, but compatibility must be double-checked. Some aftermarket caps are designed to replace multiple OEM numbers, which can be convenient for owners of multiple machines.
For a broader perspective on snow removal gear, see our roundup of best snow blowers.
If you value hassle-free fit and have the budget, OEM is the safest route. If you are comfortable confirming specs, a quality aftermarket cap can save money. We include both types in our recommendations.
Why You Should Trust Us
Snow Removal Wiki evaluates products independently using a consistent methodology. Each snow blower gas cap is scored on our 0, 10 SRW Score based on specifications, cross-referenced expert reviews, and verified customer feedback.
We do not conduct our own product trials; our evaluations are grounded in research, published data, expert review consensus, and verified buyer feedback. Our team researches dozens of sources to ensure accuracy and reliability.
We are an affiliate site: if you purchase through our Amazon links, we may earn a commission at no extra cost to you. This does not influence our rankings. Our goal is to help you find the right part for your machine efficiently.
Final Thoughts
- Best Overall: Gas Fuel Tank Cap Replacement for Troy Bilt Craftsman MTD YardMan, With an SRW Score of 9.4/10, this cap offers broad compatibility for MTD-style engines, a secure vented design, and durable construction at a reasonable price.
- Best for Tecumseh Engines: Red Fuel Gas Cap for Tecumseh H35 H40 HM80 HM90, Scoring 9.2/10, this cap fits the popular Tecumseh engine family and features a vibrant red color that makes it easy to spot.
- Best Value OEM: Genuine OEM Tecumseh Parts Fuel Cap 37844, At 9.1/10, it is an authentic Tecumseh replacement that guarantees fitment and reliability for a wide range of older snow blowers.
- Best for Ariens: Ariens OEM Black Fuel Cap AX & Sno-Tek Engines, With an 8.8/10 score, this factory-original cap is the right choice for Ariens machines using AX or Sno-Tek engines.
- Best Budget Aftermarket: Fuel Cap 37844 Compatible with Tecumseh Premier Series Engines, Scoring 8.4/10, this low-cost alternative covers many Tecumseh models without sacrificing build quality.
Frequently Asked Questions
How do I know which gas cap fits my snow blower?
Locate the engine model number (e.g., Tecumseh H35, Ariens AX) and the original part number stamped on the old cap. Cross-reference with the product description. Many aftermarket caps list compatible engine series.
If unsure, choosing an OEM cap for your engine brand is the safest bet.
What is the difference between vented and non-vented caps?
A vented cap has a small air hole or check valve that allows air into the fuel tank as fuel is consumed. This prevents a vacuum that can cause the engine to stall or run poorly.
Non-vented caps are sealed and are typically used on older or specialized equipment. Most modern snow blowers require a vented cap.
Can I use a universal gas cap?
Many universal caps exist, but they often fit only a range of engines. You must confirm that the thread pitch, inner diameter, and overall height match your tank.
Universal caps may not seal as well as model-specific ones, potentially causing leaks or poor venting. We recommend caps explicitly listed for your engine series.
Why is my snow blower gas cap leaking?
Leaks are usually caused by a worn or cracked gasket, a damaged cap sealing surface, or cross-threading. Inspect the gasket for hardness or cracks. If the cap itself is warped or the tether is broken, replacement is the easiest fix.
Ensure the cap is tightened fully but not overtightened.
How often should I replace the snow blower gas cap?
There is no set schedule, replace it when it fails to seal, the gasket is brittle, or the cap is lost. If you notice fuel odor, drips, or hard starting, inspect the cap first.
Many users replace their cap every 3, 5 years as part of seasonal maintenance. For more seasonal tips, see our guide on best snow blower for Massachusetts winters.
About the author
Harry writes reviews and buying guides for Snow Removal Wiki.