SENIX 4QL 31-cc 4-cycle 550-CFM 127-MPH Gas Handheld Leaf Blower

Name: SENIX 4QL 31-cc 4-cycle 550-CFM 127-MPH Gas Handheld Leaf Blower
Brand: SENIX
SKU: 5000464255
Rating: 3.2 (48 reviews)

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3.2

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The SENIX BLV4QL-M 31 cc 4QL blower/vac features a 4-cycle engine that does not require mixing gas and oil, is lightweight, and provides the power to clear heavier debris. Four-cycle engine has lower emission and is more environmentally friendly than 2-cycle. The fan and motor design generate up to 127 MPH and 425 CFM (up to 550 CFM in vacuum mode) for exceptional debris and leaf clearing capability. The metal mulching blade reduces debris at 10:1 ratio into a durable zippered bag, which can be easily emptied when full. All SENIX 4QL gas powered products are backed by our 3-year limited warranty for your peace of mind.

High Performance: Air volume and air speed up to 550 CFM/127 MPH
Powerful Engine: The 31 cc 4QL® 4-cycle full crank engine provides strong power with low vibration
Ease of Use: Patented 4QL® Technology (Quantitative Lubrication) 4-cycle engine requires no mixing of gas and oil, and provides all-directional use, which means no stalling or oil leakage and keeps the motor lubricated in any direction
Mulcher Capability: Reduces debris at 10:1 ratio – great for composting into garden or flower beds
Vacuum Capability: Heavy duty vacuum kit included with 1.4 bushel collection
Maneuverability: 4QL® engine is 20% more compact and lightweight; Dual grip handle allows for easier blowing and vacuum control
Eco-Friendly: 4QL® technology delivers low emissions and low fuel consumption
Includes: Collection bag, spark plug wrench, 2 oz bottle of engine oil
Warranty: 3-year limited warranty for peace of mind

General
Color/Finish Family	Blue	Grade	Residential
Manufacturer Color/Finish	Blue	Application	Leaf and debris removal for up to 1-acre yards
Series Name	4QL	Package Contents	Blower with blower tubes, vacuum kit, SAE30 engine oil (2 oz), Torx wrench, product manual and quick start guide
Type	Handheld leaf blower	Start Type	Manual
Power Source	Gas	Engine Type	4-cycle
Package Quantity	1	Usage	Medium-duty

Dimensions
Engine Oil Capacity (oz.)	2	Amperage	0
Weight (lbs.)	12.78	Cord Length (Inches)	0
Battery Amp Hours	0	Maximum Air Volume (CFM)	550

Features
Brushless	No	Maximum Air Speed (MPH)	127
Corded/Cordless	Cordless	Mulching Capable	Yes
Decibel Rating	72	Number of Batteries Included	0
Engine Displacement (Cu. Centimeters)	31	Recommended Engine Oil	30W
Engine Horsepower	1.07	Refurbished	No
Engine Oil Included	Yes	Vac/Mulch Ratio	10:1
Fuel Capacity (Gallons)	9.46	Vacuum Capable	Yes
Interchangeable Tips	No	Vacuum Kit Included	Yes
Lowe's Exclusive	No	Variable Speed	Yes

Compatibility
Optional Electronic Start Compatible	No

Warranty
Warranty	3-year limited

Certifications
CA Residents: Prop 65 Warning(s)	No	Safety Listing	Not safety listed
CARB Compliant	No

Miscellaneous
UNSPSC	27112700

Check out the Best Selling Leaf Blowers on Lowes.com

Review

3.2 out of 5

48 Reviews

26% Recommend this product

Ratings may include incentivized customer reviews.

+ 12

What Customers Are Saying

Customers are sharply divided on this leaf blower. Many praise its powerful airflow, lightweight design, and 4-cycle engine that eliminates fuel mixing, noting it easily clears leaves, debris, and snow across large areas. However, a substantial number report the unit won't start despite following instructions, or dies shortly after use, suggesting a widespread ignition defect. Those who get it running love the performance and quiet operation, but nearly as many struggle with reliability issues that render the tool unusable. Overall, reviewers are split between strong satisfaction and severe frustration.

Customer review summary generated by AI, including incentivized reviews.

48 Customer Reviews

Sort By

Junk!

Would Not Recommend

Got this last summer, used less than an hour, emptied fuel tank and ran dry for winter storage. First time using it this spring, put in fresh gas and it ran for 5 minutes and died. Can't get it to start. Checked, spark plug, getting spark but still won't start. Waste of money!

JackMay 5, 2026
Verified Purchaser

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Great!!!

Would Recommend

Works great! This blower is powerful and easy to handle.

hamoonOctober 11, 2025

From YAT USA, Inc

Terrible!

Would Not Recommend

Product never started. Took it back to Lowes and nobody could get it to start. I returned that one and ordered another one hoping the first was just a lemon. WRONG! The second one never started either. Senix customer service never contacted me back after I left a message and emailed asking for assistance.

LowesshoperMay 21, 2025

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Sinex 4 cycle blower/vac Great price Bad Machine

I wanted to like this product, it was defective right out of the Box! It would not start. I noticed the manufacturer. They sent another one with the same problem. No Spark. These machines have an ignition problem. It was the best price for a blower / vac gas only 4 cycle engine. It is a shame they are not able to produce a workable unit. If there manufacturing was as good as their customer service, then the machine would have worked!

ChristopherMay 2, 2025
Verified Purchaser

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stick with 2 stroke

Would Not Recommend

Not a great experience this far, shuts off for no reason, bag has a hole in it already, not well made bag

nickwJanuary 6, 2025
Verified Purchaser

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Response from Senix Tools

We hope you’re doing well. We’re sorry to read about the experience you had with your SENIX product. We are committed to delivering top-quality tools...

Senix ToolsJanuary 9, 2025

senixtools

Problem with the product not working.

Would Not Recommend

Assembled the product per the directions. Started it up and after about 3 minutes or so it stopped. Could not get it restarted. Very disappointed with the product.

Jake JDecember 17, 2024
Verified Purchaser

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Response from Senix Tools

We hope you’re doing well. We’re sorry to read about the experience you had with your SENIX product. We are committed to delivering top-quality tools...

Senix ToolsDecember 18, 2024

senixtools

Worth the cost. No mixing fuel and less noise

Would Recommend

Easy to follow start up instructions. Blower started easily and functions well with less noise than a 2-stroke engine I am very pleased with the power of the leaf blower

72KnightNovember 11, 2024
Verified Purchaser

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Product sucked —- NOT

Would Not Recommend

Confusing to assemble, very difficult to start, worked for an hour at vacuuming then nothing. Gas was clean, container clean, oil at proper level. Awkward for smaller statures person to handle. Very disappointed in that a major consumer product testing company provide high marks. Bright side, the folks at Lowe’s were awesome.

Leaf StackerNovember 11, 2024
Verified Purchaser

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Response from Senix Tools

We hope you’re doing well. We’re sorry to read about the experience you had with your SENIX product. We are committed to delivering top-quality tools...

Senix ToolsNovember 11, 2024

senixtools

Would not start

Would Not Recommend

Looking at reviews now see this is a common problem wished it worked looks great built compact

Buddy57September 6, 2024

Was this Review Helpful ?

Response from Senix Tools

We hope you’re doing well. We’re sorry to read about the experience you had with your SENIX product. We are committed to delivering top-quality tools...

Senix ToolsSeptember 16, 2024

senixtools

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		Name	Current Item SENIX4QL 31-cc 4-cycle 550-CFM 127-MPH Gas Handheld Leaf Blower
		Ratings	48
		Power Source	Gas
		Type	Handheld leaf blower
		Weight (lbs.)	12.78
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Handheld leaf blower	Handheld leaf blower	Handheld leaf blower	Handheld leaf blower	Backpack leaf blower	Backpack leaf blower	Handheld leaf blower	Handheld leaf blower	Backpack leaf blower
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