What is the valve clearance for the OHV 's

.003-.005 intake, .005-.007 exhaust for single cylinder OHV

https://www.fixya.com/support/t24852861-valve_clearance_19_5hp_briggs_ohv

Rotate the engine in the direction it runs, since the stroke sequence is intake, compression, power, exhaust, the exhaust valve will open and close followed closely by the intake. After the intake opens and closes there will be a pause before the exhaust opens and closes again.

Link : https://heavy-equipmentmanual.com/

Briggs and Statton OHV engines require periodic valve lash adjustment. 0.006" for both exhaust and intake is sufficient.

Briggs and Stratton Valve Clearances

outdoorpowerinfo.com/engine_specs/briggs_valve_gaps.asp

Briggs & Stratton Intake and Exhaust Valve Clearances. Model Series, Engine Type, Intake Valve Clearance ( in. ) Exhaust Valve Clearance ( in. ).

Briggs and Stratton 10hp Generator Carburetor Repair ...

? 6:17
https://www.youtube.com/watch?v=O-fROtibEvE
Jun 5, 2010 - Uploaded by IFIXIT4U
In this video I will show you how to clean the carb on a Briggs10hp. This is a Nikki carb.

Cold engine adjust the valve lash to 5 thousands (.005) for both exhaust and intake valves.

You watch the videos, they said different. I go with .004 on intake&
EXHAUST. Type in adjust valves ( your engine) in Goggle, watch a
video.

You could first try resetting the valve clearances. The B & S Website should provide the settings as well as a manual.

The solenoid on carb was bad causing reduced gas to motor and low power

set the intake at .003 to.005 and the ext. at .005 to .007