Test 1 Flashcards
Overhaul that is returned to “original new specifications”.
Remanufactured Overhaul
Overhaul that is returned to “Serviceable Limits”.
Standard Overhaul
_____ inspection is the complete disassemble, inspection for damage and reassembly of the engine.
Bulk Inspection
When does bulk inspection carried out?
After a PROP STRIKE, WATER IMMERSION, OVER SPEED, FOREIGN OBJECT INGESTION, SUDDEN STOPPAGE.
What is the purpose of internal magneto timing?
to set Efficiency gap (E-gap) position for most intense or highest energy spark from the magneto
How to adjust e-gap?
thisis done by adjusting primary points to open/break the primary coil/circuit at the point of highest intensity
Breaker points are connected to _______?
primary circuit/coil/lead
What is the position of the engine when timing a magneto?
10-25 degrees before TDC on the Compression stroke
Why do we delay the spark when starting and how is it achieved?
to prevent kickback, and it is acheived by using an impulse coupler.
Green spark plug (inner surface)
0.010
yellow Sparkplug (inner surface)
0.020
Orange sparkplug (inner surface)
chrome plated
orange and white sparkplug (inner surface)
Cermichrome
Unpainted sparkplug (inner surface)
standard steel barrell
leaking from breather
change the piston ring
Whistling sound
There’s a LEAK on the crankcase
how to adjust clearance on hydraulics?
adjust with pushrod
If not hyrdraulic, adjust on the _____?
adjust the screw on the rocker arm
what does thrust washer do?
limits fwd and aft movement
When does the valve overlap happens?
just before the end of exhaust stroke
which side has more cooling fins?
exhaust
What position should be a compression test be done?
ignition off, throttle closed position, mixture control idle cutoff position, fuel selector off
Position of soap test be done?
BDC
How are barrell and cylinder head attached?
interferance fit
Inner surface cylinder color indications
Unpainted: standard steel
Orange: chrome plated
Blue: Nitrided barrell
green: 0.010 oversize
yellow: 0.020 oversize
Sparkplug paint?
Yellow: Long reach 13/16” thread depth
No paint: Normal reach 1/2” thread depth
Function of compression ring?
provides seal for gases in the cylinder and transfers heat from the piston to the cylinder walls
function of oil control rings?
controls the amount of oil between the piston and cylinder wall
Functions of oil scraper rings?
wipe excess oil away gromoil control ring, backm into the sump (wet/dry)
Camshaft speed vs cranksshaft speed?
camshaft rotates 1/2 the speed of crankshaft
Purpose of Nitriding cylinder walls?
hardened to reduce wear but still rust easily as plain steel
Purpose of chroming cylider.?
to resist wear and provide corrosion resistant
Sound from the carburetor indicates?
leak on the intake
sound in the exhaust indicates?
leak on the exhaust fins or cracks
What does whistling sound indicates (high pressure)?
leak from crankcase
Reason to carry major overhaul?
TBO is due
If adjustment points is damaged, what will you do?
change the capacitor
how to install a magneto?
1 cylinder at firing position of compression stroke
