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* Power Ratings: The gross power rating for individual gas engine models is labeled in accordance with SAE (Society of
Automotive Engineers) code J1940 (Small Engine Power & Torque Rating Procedure), and rating performance has been
obtained and corrected in accordance with SAE J1995 (Revision 2002-05). Torque values are derived at 3060 RPM; horse-
power values are derived at 3600 RPM. The gross power curves can be viewed at www.BRIGGSandSTRATTON.COM.
Net power values are taken with exhaust and air cleaner installed whereas gross power values are collected without these
attachments. Actual gross engine power will be higher than net engine power and is affected by, among other things, ambi-
ent operating conditions and engine-to-engine variability. Given the wide array of products on which engines are placed, the
gas engine may not develop the rated gross power when used in a given piece of power equipment. This difference is due
to a variety of factors including, but not limited to, the variety of engine components (air cleaner, exhaust, charging, cooling,
carburetor, fuel pump, etc.), application limitations, ambient operating conditions (temperature, humidity, altitude), and engine-
to-engine variability. Due to manufacturing and capacity limitations, Briggs & Stratton may substitute an engine of higher rated
power for this Series engine.
Product Specifications 7800918-00 7800920-00 7800932-00 7800921-00
Deck Size (in / cm) 28 / 71 28 / 71 33 / 84 33 / 84
Height of Cut (in / cm) 1.5 - 4.0 / 3,8 - 10,2 1.5 - 4.0 / 3,8 - 10,2 1.5 - 4.0 / 3,8 - 10,2 1.5 - 4.0 / 3,8 - 10,2
Transmission Type 5-speed disc drive 5-speed disc drive 5-speed disc drive Hydro
Ground Speed - Forward (mph / kph) 1.0 - 4.5 / 1,6 - 7,2 1.0 - 4.5 / 1,6 - 7,2 1.0 - 4.5 / 1,6 - 7,2 0 - 5.0 / 0 - 8,0
Ground Speed - Reverse (mph / kph) 0 - 1.9 / 0 - 3,1 0 - 1.9 / 0 - 3,1 0 - 1.9 / 0 - 3,1 0 - 2.0 / 0 - 3,2
Gross Engine Power * 10 11.5 12.5 14.5
Engine Displacement (cc) 223 344 344 500
Spark Plug Gap (in / mm) 0.030 / 0,76 0.030 / 0,76 0.030 / 0,76 0.030 / 0,76
Spark Plug Torque ( lb-in / Nm) 180 / 20 180 / 20 180 / 20 180 / 20
Oil Capacity (oz / l) 20 / 0,59 48 / 1,40 48 / 1,40 48 / 1,40
Fuel Tank Capacity (qt / l) 8 / 7,6 8 / 7,6 8 / 7,6 8 / 7,6
Tire Pressure - Front (psi / bar) 15 / 1,03 15 / 1,03 15 / 1,03 15 / 1,03
Tire Pressure - Rear (psi / bar) 12 / 0,83 12 / 0,83 12 / 0,83 12 / 0,83
Rear Engine Riding Mower
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