what is horse power rating of motor

There's an easy way to calculate the power of an electrical motor. First you multiply the volts times the amps to find the total power in watts, in this case 120 volts times 13.5 amps equals 1,620 watts. Next, you figure in an average 85% efficiency for electric motors to get 1,377 watts. (It's fair to assume this low-cost AC appliance uses a typical AC induction motor which is probably more like 80% efficiency, and the manufacturer doesn't claim anything better, but let's give them the benefit of the doubt since there are some electric motors that exceed 95% efficiency.) Then, you consider that you'll always be using this while plugged into an extension cord. Let's say it's the typical $30 14 gauge, 50 foot cord that's common (but be aware that longer or shorter cords, or higher or lower wire gauge, will change this) and factor in another 3% drop in power, so you have 1,335 watts at the machine.Now, 1335 watts is about 1.8 horsepower. If you're comparing this to the popular Mantis 16 inch tiller, with a 4-stroke Honda GX35 gas engine, that has 1.3HP at 7,000rpm. So on paper, this is 38% more powerful, but there are lots of other differences. It has a very different tine shape, but of course caring for a gas engine and getting virtually unlimited portability, vs. a maintenance-free electrical motor while tied to a power cord, are also big differences. TL,DR: This is more powerful in most cases than its gas competitors, and that's important but it's not the only consideration.

has anyone compared the 12 amp model to the 13.5 amp one? is it worth spending the extra money to get the 13.5 amp tiller?

Our soil here in Montana has a lot of clay and turns rock hard when dry. I have the 13.5 but to keep it from dancing all over the place I put a fifty pound lead weight on it to hold it down. With the extra weight it does a great job

Is 13.5 amps too much for a 15 amp circuit?

You will be fine on a 15A circuit. Recommendations from the manufacturer are 14/3 (14gauge 3conductor) extension cord for up to 50ft and 12/3 extension cord for up to 100ft. Total length should not exceed 100ft however I'm sure a 10/3 extension cord would be fine for more than 100ft but a 10/3 extension cord would be very expensive. Please be aware that the tiller pulls the most current with the tines are digging deep in the soil and the motor is bogging down and under extreme strain it's possible it might pop the breaker on a 15A circuit.

Can tines be removed for narrower tilling area?

yes, but...the tines are an assembly of 3 held to the shaft with a through bolt. If you removed one assembly you could till with just one side, but the tiller is still over a foot wide and the empty shaft is still sticking out even without the tines. this is a powerful machine, I would look at a lighter, narrower tiller if you want to do a more narrow area.

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Sun JoeElectric Corded Garden Tiller & Cultivator, Steel Tines, 13.5 Amp, 16 Inch, Black - Heavy Duty Gardening Machine Equipment for Lawn, Yard, & Grass, TJ604E

Sun JoeElectric Corded Garden Tiller & Cultivator, Steel Tines, 13.5 Amp, 16 Inch, Black - Heavy Duty Gardening Machine Equipment for Lawn, Yard, & Grass, TJ604E

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Product ID: 32034622

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Brand
Sun Joe
Color
Green/Black
Product Dimensions
21"D x 17.9"W
Power Source
Corded
Material
Alloy Steel

⚡13.5 Amp powerful motor

📏16-inch tilling width

🔧6 rust-proof steel tines

Description

🌱 Cultivate your garden like a pro—power, precision, and zero compromise!

BUILT TO LAST - Durable, rust-proof steel tines engineered for long-term garden domination
PRECISION CONTROL - 3-position adjustable wheels for perfect tilling depth on any terrain
SPACE SAVVY DESIGN - Folding handle for compact storage and easy transport—ideal for urban gardens
ECO FRIENDLY EFFICIENCY - Corded electric operation means zero gas, zero fuss, and continuous power
POWER THROUGH YOUR SOIL - 13.5 Amp motor delivers relentless tilling power for effortless soil prep

The Sun Joe TJ604E is a heavy-duty electric garden tiller featuring a robust 13.5 Amp motor that tills up to 16 inches wide and 8 inches deep. Equipped with 6 rust-proof steel tines and adjustable wheels, it offers durable, precise soil cultivation. Its folding handle ensures easy storage and portability, while the corded electric design provides continuous, low-maintenance power without gas or oil.

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Operation Mode	Electric
Power Source	Corded Electric
Item Weight	27.08 Pounds
Item Dimensions D x W x H	18"D x 21"W x 52"H
Material Type	Alloy Steel
Color	Green/Black

Sun JoeElectric Corded Garden Tiller & Cultivator, Steel Tines, 13.5 Amp, 16 Inch, Black - Heavy Duty Gardening Machine Equipment for Lawn, Yard, & Grass, TJ604E

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