Simplicity 7790H

Simplicity 7790H lawn tractor photo
Garden tractor

Note: the Simplicity model 7790H is the same as the Allis Chalmers 920. The following data is from the 920 listing.
Garden tractor
Built in Port Washington, Wisconsin, USA
Original price was $6,099 in 1985
Simplicity 7790H Engine
18.5HP Lombardini 790cc 2-cyl diesel
Fuel tank3 gal
11.4 L
Engine details ...
Two-wheel drive
Final drivesspur gear
 power optional
Mechanical band brakes
Open operator station.
Tractor hitch
Typesleeve hitch *Optional. Part number 1600055.
Dimensions & Tires
Wheelbase48.1 inches
122 cm
Weight689 lbs
312 kg
Front tire16-6.50x8
Rear tire23-10.50x12
Full dimensions and tires ...
Simplicity 7790H attachments
42" mid-mount mower deck
48" mid-mount mower deck
Attachment details ...
7790H Serial Numbers
7790H Serial Location
Simplicity 7790H serial number location
Serial number plate on the left side of the tractor frame, just ahead of the seat.
Links information, photos and old advertising literature at
Charging systemflywheel alternator
Charging amps16
Battery CCA500
Battery volts12
Battery Group24
Page information
Peter Easterlund - owner of
Copyright 2023®
TractorData is a family-owned small business located in Minnesota that has been providing reference information on tractors since 1999.
Peter Easterlund - owner/author
Updated on January 8, 2022 - Official operator manuals for download from Simplicity.
©2000-2023 -®. Notice: Every attempt is made to ensure the data listed is accurate. However, differences between sources, incomplete listings, errors, and data entry mistakes do occur. Consult official literature from the manufacturer before attempting any service or repair.