Compare/Sears ST/12 917.2573 vs Sears Suburban 12 917.99420

Sears ST/12 917.2573 vs Sears Suburban 12 917.99420

Verdict: Sears ST/12 917.2573 vs Sears Suburban 12 917.99420

The Sears ST/12 917.2573 and the Sears Suburban 12 917.99420 are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 12 hp. Sears Suburban 12 917.99420 is the lighter machine (263 kg vs 290 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Sears ST/12 917.2573 is the newer design (1973 vs 1966). Use the full side-by-side spec tables below to weigh the details against your own operation, and confirm with a dealer demo.

Tune the fit score

Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

Sears

Fit score

Best match

Clear

Sears

Fit score

Best match

Clear

Rated power

12 hp

Confidence

40%

Guide price

—

Overview

Distributor

SearsReference

Manufacturer

RoperReference

David BradleyReference

air-cooled horizontal-shaftReference

Three gears (1-3) plus reverse (R) with two ranges (low-high).Reference

Engine

Displacement

27.66 ciReference

Bore/Stroke

89 x 73 mmReference

Power

8.9 kWReference

—

Starter

electricReference

Starter volts

12Reference

Power (gross)

—

8.9 kWReference

Fuel system

—

carburetorReference

Rated RPM

—

3600Reference

Sparkplug gap

—

0.762 mmReference

Point gap

—

0.508 mmReference

Intake valve clearance

—

0.254 mmReference

Exhaust valve clearance

—

0.508 mmReference

Oil change

—

500 hReference

Transmission

Gears

6 forward and 2 reverseReference

Oil capacity

—

4.7 LReference

Oil type

—

SAE 30Reference

PTO & Hydraulics

Type

belt-driven gearReference

Mid PTO

independentReference

—

Clutch

manualReference

—

Dimensions

Wheelbase

110 cmReference

—

Weight

290 kgReference

263 kgReference

Front tire

16x5.50Reference

4.80-8Reference

Rear tire

22.5x7.50Reference

7.50-12Reference

Lawn/turf front

16x5.50Reference

4.80-8Reference

Lawn/turf rear

22.5x7.50Reference

7.50-12Reference

Length

173 cmReference

—

Width

92 cmReference

—

Height (steering wheel)

111 cmReference

—

Shipping weight

290 kgReference

263 kgReference

Sears ST/12 attachments

Electrical

Ground

negativeReference

Battery volts

12Reference

Attachment overview

Sears Suburban 12 attachments

42" Mower deck

Cutting width

—

106 cmReference

Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.