small engine parts system by system
Post on 18-Jan-2018
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Small Engine Parts
System by System
Engine Systems
• Mechanical• Ignition• Fuel & Air Delivery• Lubrication• Exhaust• Electrical…Charging, Starting, Lighting & Accessory
• Cooling• Emission Control
Mufflers..Quiet & Help with Scavenging
Exhaust
A system to quiet the engine operation and properly scavenge
out spent air & fuel without allowing fresh air & fuel to leave
the engine
Stops the “pop”after shutting off the engine
Anti-after-fire solenoid
Closes the main jet
Reduces HC emissions
Compression ratio is designed to keep burning well below2400 Fº in an effort to reduce NOx emissions
These adjustments are either non-existent or are capped-offon low emissions engines in an effort to prevent indiscriminateadjustment by unskilled individuals which would lead to increasedHC & CO & NOx air pollution.
High Speed & Low Speed Mixture Screws
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