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4-20-2020
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Back
Cover or Rear Cover
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Refers
to the cover on the back of the engine.
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Front
cover of Front Housing
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Refers
to the removable housing the crankshaft rides in on some engines |
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One
piece case
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Refers
to a crankcase that houses both the cylinder and crankshaft |
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Two
piece case
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Refers
to a crankcase that has a bolt on front housing. |
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PTO
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Power
Take Off
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Schnuerle
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a
type of porting used in 2 stroke engines named after the inventor.
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Loop
Scavenged
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a
type of porting used in most older 2 stroke engines
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Cross
Flow
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a type
of porting used in most older 2 stroke engines |
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Dykes
Ring
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"L"
shaped piston ring
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RISE
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Rear
Intake Side Exhaust
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FISE
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Front
Intake Side Exhaust
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RIRE
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Rear
Intake Rear Exhaust
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FIRE
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Front
Intake Rear Exhaust
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RIFE
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Rear
Intake Front Exhaust (marine engines)
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Bushing
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Usually
refers to the bearing the crankshaft rides in.
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Ball
Bearing
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Usually
refers to the crankshaft riding in one or two bearings
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Single
Ball Bearing
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Normally
on the rear portion of the crankshaft closest to the cheek or
crank area while the forward portion is either running in a
bushing or directly on the aluminum. |
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Double
Ball Bearing
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Refers
to the crankshaft riding in two bearings. One in the front
directly behind the prop driver and one in the rear close
to the cheek
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Prop
Driver
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The
knurled hub that's secured to the crankshaft either with a tapered
collet, solid taper to taper fit, hole with flat, hole with
2 flats, broached spline, square hole, or keyway. |
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Heat
sink head
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Refers
to a cylinder hear with extra cooling fins.
Normally used on a car or helichopter engine.
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Wrist
Pin
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Is
the pin in the piston which the connecting rod pivots on.
Less commonly refer to as a piston pin
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connecting
rod
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The
rod that connects and transfer piston motion to the crankshaft.
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Intake
or inlet port
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On a
2 stroke engine the fuel air mixture enters the crankcase through
a timed valve, either via a port on the crankshaft, a rotating
disk or drum, a reed valve, or through a port below the piston
which is timed by the skirt of the piston. |
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Draw
Bar
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A bar
the holds the carburetor in place. Usually pulled one direction
with a nut. Some are two pieces and pulled together with a screw. |
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