Briggs Model 8 Engine

The Briggs and Stratton model 8 (cast iron) was manufactured from 1949 to 1953.
This model uses a rope cup starter to start the engine.
This engine uses the L-head design.
 It is equipped with an adjustable pneumatic or mechanical governor.
The air cleaner on this engine is an efficient oil-bath type.   
The type K, (flo-jet) float type carburetor is used on this model.     
The exhaust is aspirated through a 1/2" NPT threaded port.
The gas tank is mounted externally to the head and blower housing.
The oil sump is cast aluminum. The head is cast iron.
The engine block is made of cast iron and utilizes fins for air cooling.
The piston and connecting rod are made of aluminum alloy.
The crankshaft is counter-weighted and drop forged.
Displacement: 7.9 cubic inches,
2.25" bore and 2.00" stroke.
Cold Intake valve clearance: .008" Exhaust valve clearance: .015"
Rated at 1.87 horsepower at 2600 rpm.
Rated at 2.27 horsepower at 3100 rpm.
Rated at 2.50 horsepower at 3600 rpm.
Engine operating speed range: 2200 to 3200 rpm.
Idle speed: 1750 rpm. Lubrication: Splash system.
Oil capacity: 1 pint. Gas tank capacity: 2 quarts.
Ignition: High tension magneto. Breaker Gap: .020"
Armature core to magneto gap: .008" to .012"  
Spark plug: 14mm - Allstate C13 or equivalent. Spark Gap: .025"

Additional notes:
This is a NOS Briggs old model 8. Historical data shows there was an old model  8 and a new model 8 built by Briggs and Stratton. This engine looks similar to the Model N in many ways to me. The ID tag has an "8" stamped on it. The pot-metal carburetor has the usual age corrosion between the upper and lower carburetor body pieces.

Briggs and Stratton is the trade name of the Briggs and Stratton corporation.

Published by MSPI © 2012. All rights reserved

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