Small motor 229-290

The intake valve clearance is:

.005 to .007

The exhaust valve clearance is:

.007 to .009

For every thousand feet above sea level, power is reduced by approximately what percent

3.5%

What is the most likely if you check the oil in a small engine and find that it is over full and smells like gasoline? A) the ignition system is probably at fault and needs repair B) the fuel system is probably at fault and needs repair C) the engine has compression problems D) nothing is wrong

B) the fuel system is probably at fault and needs repair

Mounting a(n)_____ would allow you to attach the furl tank anywhere near the engine

fuel pump

atmospheric pressure is commonly between:

13 to 15 pounds per square inch

The ideal combustion mixture in the flo-jet carburetor is about:

14 to 15 ibs of air, in weight to one pound of gasoline

The rapid changes in magnetism produces:

170 volt in the primary circuit

The flywheel key is:

A locator and not a driver

What is pre-ignition?

Abnormal combustion before the timed spark

In a flow jet carburetor there is an:

Air vent hole in the tank cap to let air flow in as fuel flows out and a hole in the bowl so that air flows out as fuel flows in

Fuel pouring out of a flo het carburetor can be a sign of which of the following problems? A) dirty jet B) Fuel needle stuck open C) cracked float D) both B and C

D) Both B and C

to clean a cartridge type air cleaner: A) tap the cartridge on a flat surface B) Wash in on sudsing detergent and flush from the inside until the water is clear C) replace, do not clean D) both A and B

D) both A and B

As a general rule, engine horsepower will

Decrease as elevation increases

Fair compression is necessary in order to obtain the full horsepower of an engine.

False

The RJ19LM spark plug from the L-Head engines is interchangeable with the RBL-15Y off the OHV engines

False

The vacu-jet carburetor should be adjusted with the fuel tank:

Half full

To check for compression on small engines:

Spin the flywheel counter clockwise and is should bounce back indicating good compression

While troubleshooting the ignition system on a small engine, you find that the system will not fire the spark plug unless you disconnect the kill from the ignition coil. The most likely problem is:

The coil is good, the problem is with the engine kill system

Loose carburetor mounting bolts on a small engine ill cause

The engine to starve for fuel

What is the most likley problem if an engine will not fart, kicks back when you pull the rope, and the value clearance is correct?

The flywheel key could not be sheared

TDC is an abbreviation for

Top dead center

An engine that has good compression, carburation, and ignition should operate efficiently.

True

Any number of engines from the same manufacturer could all have the same model number

True

If the flywheel is not torqued to specifications, it may result in a sheared flywheel key.

True

In a gravity feed system, the tank is above the carburetor and fuel flows by gravity

True

T or F. With vacu-jet carburetors, the fuel tank is below the carburetor. Therefore, the force of atmospheric pressure must be employed.

True

The governed speed of Briggs & Stratton engines can be altered by changing the colored governor spring.

True

Valve condition is more important in a one cylinder engine than it is a multi-cylinder engine

True

Excessive spark plug electrode clearance will cause

a high speed miss

With the choke you can close, or almost close, the air horn and get

a low pressure area in the venturi and throat thus a rush of fuel is obtained with a relatively small amount of air

A 3HP engine operating at 2600 RPM uses:

about 390 cubic feet of air an hour entering at a rate of about 24 miles an hour

The capacity of the oil foam air cleaner is:

adequate for a full season's use without cleaning with average use

What is the most likely solution when a small engine blows out a lot of black smoke when running and runs poorly

air filter change

When does the exhaust valve closes and the intake valve start to open?

at the end of the exhaust stroke

Flo jet carburetors must be mounted ___ the fuel tank to operate

below

Current can be induced in each circuit in the magneto by:

changing the magnetism

Valves that are adjusted so that there is little or no valve clearance will:

decrease engine compression and may cause the engine not to start

The three types of air cleaners on small engines are:

dual element, cartridge type, oil bath

Valve stem clearances and/or valve lash should be checked and adjusted with the valve stem caps off the engine

false

The use of lead free gasoline results in:

fewer combustion deposits and longer valve life

The three types of remote controls are:

governor control, throttle control, Choke-a-matic control

atmospheric pressure:

is a constant potent force which tends to equalize itself in any given area

If you must use gasoline with alcohol, the alcohol content should be:

less than 10%

Thr purpose of the governor is to:

maintain a desired speed regardless of load

Spark plug cables are molded into the coil so that:

moisture cannot short out the spark

The amount of fuel at operating speed is metered by the:

needle valve and seat

An air-gasoline combustion mixture that is too lean causes:

oberheating, detonation, and short valve life

Which of the following could lead to weak engine compression?

piston rings, valves, head gasket

A magneto consists of the following two circuts:

primary and secondary

In the pulsa jet carburetor, the vacuum created by the diaphragm pump:

pulls gas up the suction pipe into the pocked and then to the fuel cap

Both circuits in a magneto have winding which:

surround the same iron core and the magnets on the flywheel and rotor act on both circuits

The positive terminal of a battery is connected to:

the alternator

What is the most likely problem if the engine is flooding and dripping fuel from the carburetor?

the float could be filled with fuel

The pnumatic governor is operated by:

the force of air from the flywheel

You are starting an engine that has just been over hauled. What is most likely problem if a small engine starts but runs too fast?

the governor is not set properly

Ignition timing on aluminum engines is controlled by:

the location of the flywheel and crankshaft keyways

What is the most likely problem if the engine will run but has a lot of blue smoke coming out of the muffler

the piston rings are worn and should be replaced

A flat disc called a butterfly that is located in the throat of the carburetor above the venturi and that allows for different speed is the:

throttle

The term used to describe the period of time valves are open during engine operation is:

valve overlap

The _____ shape is carefully designed to produce certain air flow patterns

venturi

When you loosen the fuel bowl screw to check for fuel getting to the carburetor, the fuel flows out and beads up on the floor. what does this indicate?

water is in the fuel system and the system should be drained and cleaned