4 stroke Outboard Engine

DOHC outboards valve clearances are the measured distance between the "___" of the camshaft and the "___" assembly

• Lifter and Valve Stem

• Heel and bucket

• Valve end and cam lobe

• Valve stem and bucket

Answer explanation

Pg 168

If an outboard is turning 6000 RPM and the tachometer the camshafts are turning at _____ RPM

• 2000

• 3000

• 9000

• 12000

Answer explanation

Pg 165

Always rotate the engine __________

• Clockwise

• Counter Clockwise

• It doesn't matter

Answer explanation

Pg 163

When valve is closed _____ should be in or near a position to allow a feeler gauge to physically measure valve clearance

• Elliptical profile

• Base circle

• Lift

• Duration

Answer explanation

Pg 162

Piston measurement is always taken at _____ degrees to the wrist pin boss, at a specified distance from the bottom of the piston skirt

• 50

• 60

• 80

• 90

Answer explanation

Pg 180

The rings then transfer the heat to the walls of the cylinder where its dissipated to the surrounding __________

• Metal

• Water jacket

• Piston skirt

• Cylinder block

Answer explanation

Pg 178

Plain bearings for outboards are ordered and received "_______"

• One piece

• In halves

• Single

• Matched

Answer explanation

Pg 177

Name this essential function: Depending on engine speed the controlled ignition event occurs around, or before, TDC

• Intake

• Compression

• Combustion

• Exhaust

Answer explanation

Pg 158

piston approaches TDC on the compression stroke, The ECM "fires" spark plug

• Intake

• Combustion

• Compression

• Exhaust

Answer explanation

Pg. 157

What is the midsection of a outboard

• Adapter plate

• Water housing

• Exhaust housing

• Driveshaft housing

Answer explanation

Pg. 10