Craftsman 917.28721

The Craftsman 917.28721 is a tractor produced by Craftsman Lawn Tractors. The listed engine power is Gasoline (gross): 21 hp / 15.7 kW. Transmission: Dana D6800.

Engine Power

Gasoline (gross): 21 hp / 15.7 kW

Fuel & Capacities

2.5 gal 9.5 L

Transmission

Dana D6800

Overview

	2007 YS 4500 SeriesLawn tractorAYP built YS 4500 Series Lawn tractor AYP built

Production
Distributor	Craftsman (a part of Sears)
Manufacturer	AYP
Lawn tractor

Craftsman 917.28721 Engine
21HP Briggs & Stratton gasoline
Fuel tank	2.5 gal 9.5 L
Engine details ...

Craftsman 917.28721 Transmission
6-speed gear
Transmission details ...

Mechanical
Two-wheel drive
Steering	manual
Open operator station.

Dimensions & Tires
Full dimensions and tires ...

Electrical
Ground	negative
Charging amps	5 (battery)
	3 (headlights)
Battery CCA	230
Battery volts	12
Battery AH	28
Battery Group	U1R

Engine

Engine Detail — Gasoline

Manufacturer	Briggs & Stratton 311877
Fuel Type	Gasoline
Configuration	air-cooled
Power (gross)	21 hp 15.7 kW
Air cleaner	paper
Starter	electric
Starter volts	12
Sparkplug	Champion RC12YC
Sparkplug gap	0.030 inches 0.762 mm
Oil capacity	1.75 qts 1.7 L

Transmission

Transmission — Dana D6800

Transmission	Dana D6800
Type	gear
Gears	6 forward and 1 reverse

Dimensions

Craftsman 917.28721 Tires

Dimensions

Attachments

Attachment overview
42" mid-mount mower deck
Snowblower
Blade

42" Mower deck
Type	mid-mount Craftsman
	2-blade with manual lift
Cutting width	42 inches 106 cm
Cut height	1 to 4 inch 2 to 10 cm

Recommended Implements & Sizing Guide

Engineering recommendations for Craftsman Lawn Tractors Craftsman 917.28721 based on its 21 HP power envelope and ASAE agricultural standards.

Implement & Operation	Recommended Size	Workload Rating	Engineering Notes
Moldboard PlowPrimary Tillage	1 to 2 Bottom (12")1 - 2 铧 (30 cm)	Light Duty	Ideal for garden plots and light sandy soil.
Rotary Cutter / MowerMowing & Clearing	4 ft (48 in)1.2 m	Light Duty	Pasture clipping and light brush under 1" diameter.
Rotary TillerSeedbed Prep	42 to 48 in105 - 120 cm	Light Duty	Covers compact tractor tire width.
Disc HarrowSecondary Tillage	5 to 6 ft (16-18" discs)1.5 - 1.8 m (40-45 cm 耙片)	Light Duty	Small acreage soil break-up and secondary aeration.

Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for Craftsman Lawn Tractors Craftsman 917.28721.

Estimated Continuous Field Runtime: 2.3 hrs

Approximately 2.3 hours of continuous field operation at ~75% rated power on a full tank (2.5 gal / 9.5 L).

Estimated 75% Load Fuel Burn~1.1 gal/hr (4.1 L/hr)

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)

Standard Spec: API CK-4 / CJ-4 Heavy Duty

Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)

Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)

Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix

Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze

Service Interval: 2 Years / 1500 Hours

Craftsman Lawn Tractors Craftsman 917.28721 Specification Unit Converter

Convert power, fluid capacities, and operating weights between metric and imperial standards for Craftsman Lawn Tractors Craftsman 917.28721.

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Unit:

Converted Equivalents:

Horsepower (HP)21 hp

Kilowatts (kW)15.7 kW

Metric Horsepower (PS / CV)21.3 PS

Direct Competitor Comparison

Compare Craftsman 917.28721 against same-era industry alternatives in the same horsepower class.

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