Compare/Sears 18/6 Twin 917.25190 vs Sears GT/18 Hydro 917.25707

Sears 18/6 Twin 917.25190 vs Sears GT/18 Hydro 917.25707

Verdict: Sears 18/6 Twin 917.25190 vs Sears GT/18 Hydro 917.25707

The Sears 18/6 Twin 917.25190 and the Sears GT/18 Hydro 917.25707 are both lawn tractors — here is how they stack up on the figures that matter. Both are rated at the same 18 hp. Sears 18/6 Twin 917.25190 is the lighter machine (285 kg vs 312 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. Sears 18/6 Twin 917.25190 holds more fuel (13.2 L vs 7.6 L) for longer stints between fills. Sears GT/18 Hydro 917.25707 is the newer design (1978 vs 1977). 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

18 hp

Confidence

40%

Guide price

—

Overview

Distributor

SearsReference

Manufacturer

RoperReference

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

air-cooled horizontal-shaft opposed twinReference

Engine

Fuel tank

13.2 LReference

7.6 LReference

Displacement

49.8 ciReference

47.7 ciReference

Bore/Stroke

83 x 76 mmReference

83 x 73 mmReference

Power (gross)

13.4 kWReference

Air cleaner

foam and paper elementsReference

—

Rated RPM

3600Reference

—

Starter

electricReference

Starter volts

12Reference

Oil capacity

—

4.3 LReference

Oil change

—

25 hReference

Transmission

Gears

6 forward and 2 reverseReference

infinite forward and reverseReference

Oil type

—

Type F ATFReference

PTO & Hydraulics

Type

belt-driven gearReference

belt-driven hydrostaticReference

Dimensions

Weight

285 kgReference

312 kgReference

Front tire

16x6.50Reference

16x6.50-8Reference

Rear tire

23x10.50x12Reference

23x10.00-12Reference

Lawn/turf front

16x6.50Reference

16x6.50-8Reference

Lawn/turf rear

23x10.50x12Reference

23x10.00-12Reference

Length

173 cmReference

Width

92 cmReference

Height

105 cmReference

Shipping weight

285 kgReference

312 kgReference

Sears 18/6 Twin attachments

Electrical

Ground

negativeReference

Battery volts

12Reference

Battery AH

30Reference

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Attachment overview

Variants

GT/18

—

gearReference

GT18H

—

hydrostaticReference

Sears GT/18 Hydro attachments

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.