We fit a new head gasket to this Webb Lawn Mower fitted with a Briggs And Stratton 450E engine. We also check the valves for leaks and reset the valve clearance to 6 thou for the inlet and 8 thou for the exhaust.
Will it run, let's fine out.
One of our Subscribers got this information on these engines directly from Briggs And Stratton:
“8P” & “9P” Briggs and Stratton single cylinder vertical shaft ohv engine
Torque values:
Flywheel nut_____________________60 ft. lbs.
Cylinder head ___________________140 in. lbs.
Connecting rod__________________100 in. lbs.
Sump cover______________________85 in. lbs.
Rocker cover_____________________50 in. lbs.
Clearances:
Intake valve_____________________.004-.008
Exhaust valve____________________.004-.008
Piston ring end gap:
Top_____________________________006-.014
Middle__________________________006-.014
Oil Control______________________.008-.028
Specifications Model: 80000
Displacement 7.63 ci.
Bore 2.362 in.
Stroke 1.75 in.
Oil Capacity 15 oz.
Spark Plug Gap .020 in.
Spark Plug Torque 180 lb-in.
Armature Air Gap .006 - .014 in.
Intake Valve Clearance .004 - .008”
Exhaust Valve Clearance .004 - .008 in.
Model: 90000
Displacement 8.64 ci.
Bore 2.495 in.
Stroke 1.75 in.
Oil Capacity 15 oz.
Spark Plug Gap .020 in.
Spark Plug Torque 180 lb-in.
Armature Air Gap .006 - .014 in
Intake Valve Clearance .004 - .008 in.
Exhaust Valve Clearance .004 - .008 in.
The engine model number is stamped (very lightly) into the side of the engine body on these little engines. They are called "8P" and "9P" engines as their model numbers begin with these numbers and letters.
Thanks Also to Frank Kent for our gift of the oil drainer.
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