.003 exhaust-.005 intake
.004 intake.....006 exhaust
Briggs says on a cold engine, .005 on intake & .007 on exhaust. Wider on exhaust to ensure you don't burn a valve.
.007 on the intake and .011 on the exhaust.
the intake valve is bigger
For the aluminum the intake valve clearance is .005 to .007 inches. exhaust valve clearance is .007 to .009 inches. Cast iron is - intake valve is .007 to .009. inches exhaust valve is .017 to .019 inches
The intake valve is always the larger of the two.
For a 20 HP twin Briggs & Stratton engine, the valve specifications typically include a valve clearance of around 0.005 to 0.007 inches for the intake and 0.007 to 0.009 inches for the exhaust valves when cold. The engine usually features a flathead or overhead valve design, with both intake and exhaust valves made from durable materials to withstand high temperatures. Specific dimensions and tolerances can vary by model, so it's essential to refer to the engine's service manual for precise specifications.
The valve clearance on a Briggs and Stratton 21 HP OHV engine is typically set to 0.005 inches for both the intake and exhaust valves when the engine is cold. It's important to check the specific model's service manual for any variations or specific adjustments. Proper valve clearance ensures optimal engine performance and longevity.
The valve clearance for a Briggs and Stratton 406777 engine is typically set to 0.004 to 0.006 inches for both the intake and exhaust valves when the engine is at top dead center on the compression stroke. It's important to adjust the clearance when the engine is cold to ensure accurate measurements. Always refer to the specific service manual for your engine model for the most precise information.
.002-.005 intake and, .005-.007 exhaust
.006 intake and.008 exhaust