GLOSSARY

Glossary of Engine Terms

Air Filter System:

Removes particles such as dust, dirt and debris from the air and keeps it from getting into your engine.

Advanced Debris Management System Air cleaner system that forces air past the element, where large debris passes through ejection slots. Removes large dirt and debris particles for a longer lasting air cleaner element and superior engine protection.

Dual-Clean™ Combination automotive-style paper filter and foam pre-cleaner for added protection against dirt and debris. Two levels against dirt to protect and improve engine durability.

Foam Reusable washable material that uses surface oil to trap dirt and debris. Simple and convenient filter system to protect engine.

Maxi-Clean™ Disposable automotive-style pleated paper filter with debris ejection slots. Easily accessible and dependable defense against damaging dirt and debris.

Oval Dual Sealing Larger filtering capacity with two sealing surfaces for maximum prevention of dirt ingestion. Allows more airflow for improved performance, while defending against dirt ingestion for extended engine life.

Tool-Less Cover Air cleaner cover that can be removed without using a tool. Makes it easy to change the air cleaner.

Balancer System:

Mechanical device that reduces the vibration caused by the reciprocating movements of the piston. Provide less vibration and smoother operation.

AVS® (Anti-Vibration System) Patented linear balancing system eliminates side-to-side motion of traditional systems. Provide less vibration and smoother operation.

Bearing Style:

Component that separates moving parts to reduce friction and wear. Simple and reliable.

Aluminum Machined aluminum bearing surface

Ball Bearing type that uses small balls placed between two hardened metal surfaces. Improved durability and superior load capacity.

DU Steel backed Teflon coated bronze sleeve. Self-lubricating to withstand load and reduce wear.

Carburetor:

A device that mixes air and fuel in an internal combustion engine

Dual Barrel Carburetor system that incorporates two sets of air/gas mixture flow. Provides exceptional load acceptance for greater engine balance.

Pulsa Prime Diaphragm within the carburetor is actuated by the natural vacuum vented through the engine cylinder to pump fuel to the venturi of the carburetor for fuel-air mixing. Simple and reliable self-actuated fuel delivery system.

One-start™ Gravity feed carburetor system that uses atmospheric pressure to deliver fuel to the venturi of the carburetor for fuel-air mixing. Fast fuel delivery for consistent one-pull starts, better fuel efficiency and lower emissions.

Cylinders:

Central working part of internal combustion engine.

Dura-Bore™ Cast iron sleeve molded into the aluminum cylinder of an engine. Added integrity and durability that withstand wear and abuse while providing improved oil control.

Kool Bore™ Machined aluminum cylinder bore. Lightweight and corrosion resistant.

Single Cylinder Engine:

One cylinder configuration. Simple and reliable design.

V-Twin Cylinder Engine:

Two cylinders configuration where the cylinders are placed at a 45 degrees angle from each other. Inherently balanced for smooth, quieter operation.

Displacement: (cc/cube in.)

Volume of air / fuel mixture an engine can draw in during one complete engine cycle. Usually stated in cubic centimeters or cubic inches. Volume inside the engine cylinder described by the piston surface and its movement from the top dead center and bottom dead center.

Fresh Start®: Patented fuel cap and snap-in concentrated stabilizer cartridge that automatically delivers fuel preserver to fuel tank. Keeps fuel fresh for up to 6 months for improve starting.

Fuel Shut-off Valve:

Manual devise inserted in to the fuel line that when turned, shuts off fuel flow to carburetor. Allows shutting off fuel flow for transportation or storage.

Fuel Filter:

Filter inserted into fuel line that screens out dirt and debris from fuel supply.

Std Fuel filter (75 micron)Fuel filter with metal screen element. Keeps small contaminants from clogging carburetor jets and passages.

Plus Fuel Filter (75 micron) Fuel filter with paper element. 50% more capacity that keeps small contaminants from clogging carburetor jets and passages.

Silver Fuel Filter (40 micron) Fuel filter with paper element for greater fuel filtration

Platinum Fuel Filter (30 micron) Fuel filter with paper element. Provides twice the filtering capacity of standard filters for extended maintenance.

Governor:

Prevents over-speeding of the engine by holding RPM at a constant speed and also maintains speed under heavy load.

Air Vane Uses air from the rotating flywheel fan to monitor engine RPMs so the governor can maintain the selected engine speed. Simple self-adjusting system that senses load and maintains engine speed.

Mechanical This system uses gears and flyweights inside the crankcase to sense speed and detect changes in the load to adjust speed. Controls the engine speed to deliver more usable power under heavy usage.

High Oil Fill:

Oil tube fill is mounted to be accessible at the top of engine. Provides easy access to check and fill oil.

Horsepower:

Measurement of an engine's rate of doing work over time (rpm x torque / 5,252). Power to get the work done.

Ignition System:

Activating and controlling the combustion of fuel in an engine.

Magnetron® Electronic ignition system generated by a rotating magnet and coil assembly. Ensures dependable starts with no maintenance required.

Lubrication System:

A system that stores, cleans, cools, and re-circulates oil through the engine to lubricate and cool its moving parts.

Full Pressure Lubrication Full pressure lubrication is similar to an automobile engine that continuously delivers oil under pressure to critical engine components for maximum lubrication and long engine life. A high-efficiency pump in the oil sump supplies lubricant to the crankshaft and connecting rod bearing surfaces.

Pressure Lubrication Pressure lubrication provides a controlled flow of clean oil to bearings for less wear and longer engine life. A high-efficiency pump in the oil sump supplies lubricant to the crankshaft and connecting rod bearing surfaces The Pressure Lubrication System incorporates a premium spin-on oil filter.

Splash Lubrication In splash lubrication, a gear-driven dipper or slinger in the crankcase distributes oil to components, preventing clogging of small passages. On horizontal crankshaft engines, the dipper is attached to the connecting rod. It picks up oil from the reservoir and spreads it across bearing surfaces as the piston travels through the cylinder. On vertical crankshaft engines, a spinning gear with paddles is immersed in oil and slings lubricant throughout the crankcase.

Mechanical Compression Release:

Devise that keeps a valve open to release combustion chamber pressure, which automatically returns to normal with the engine's centrifugal forces. Automatically reduces compression force to provide smooth, easy starts.

Muffler:

Designed to reduce noise, improve performance and resist corrosion.

Lo-tone Benefits - Quite and good tone quality.

Quiet-tone Max Benefits - Quietest operation and tone quality.

Super Lo-tone Benefits - Quieter operation and better tone quality.

Oil Capacity (oz):

The recommended amount of oil for holding, storing, or accommodating reserve oil.

Oil Fill:

Allows access to check and fill oil to prevent over or under filling of oil.

Starting System:

Electric Start Uses a battery powered motor to start the engine via a key switch or button. Hassle-free starting. Just turn the key and go.

Prime 'N Pull™ System that requires priming to deliver fuel directly to start an engine. Delivers the right amount of fuel to system for dependable starting.

Ready Start® System that automatically senses engine temperature to deliver the right amount of fuel to the carburetor. Does not require priming, or choking. Just pull for power.

4" Rewind Starter Spring return mechanism that returns the rope and handle to start position. Reliable self-returning starter that saves time and energy.

5" Rewind Starter Spring return mechanism that returns the rope and handle to start position. 25% larger for reduced pulling effort and easier starting.

Smooth Start™ High output ignition coil and specially tuned carburetor. 20% easier to pull.

Torque:

A measurement of force needed to cause an object to rotate. Power to get the work done.

Valve Design:

Any of numerous mechanical devices by which the flow of liquid, gas, or loose material in bulk may be started, stopped, or regulated by movable parts that open, shut, or partially obstruct one or more ports or passageways.

DOV® (Direct Overhead Valve) OHV configuration with direct actuation of the valves through a unique lever system. Patented new design that delivers more responsive power, less noise, and smoother operation.

OHC (Overhead Cam) Configuration with the cam shaft, inlet and exhaust valves located in the cylinder head above the pistons.

OHV (Overhead Valve) Configuration with the inlet and exhaust valves located in the cylinder head above the pistons. Better optimized performance that runs cooler and cleaner for longer engine life and improved fuel economy.

Side Configured with both valves side by side within the cylinder block, typically parallel to the cylinder bore. Simple and reliable with less overall maintenance.

Weight (lbs./kg):

Total weight measurement of standard engine configuration.