Briggs & Stratton MS-1055 - Page 6

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5
GENERAL INFORMATION
C
y
linder
Type Single piece casting
Cylinder
Head
Material Cast Iron
Combustion Chamber Swirl Type
Valve seat angle
Intake
45°
V
a
l
ve seat ang
l
e
Exhaust
45°
Valve
Intake
Opens 10° BTDC
235
°
V
a
l
ve
Specifications
Valve timin
g
I
nta
k
e
Closes 45° ABDC
23
5°
Specifications
Valve timing
Exhaust
Opens 45° BBDC
235
°
E
x
h
aust
Closes 10° ATDC
23
5°
Valve clearance (cold)
Intake mm (in) 0.20 (.008 in)
V
a
l
ve c
l
earance
(
co
ld)
Exhaust mm (in) 0.20 (.008 in)
Cylinder
Block &
Cylinder block Mono-block, three cylinder, cast iron
Block &
Camshaft
Camshaft Carbon steel
Connecting rod Carbon steel
Piston Pin Bearing Machined – Piston pin, slip fit
Connecting
Rod & Piston
Crankpin
Bearing
Material aluminum alloy – replaceable insert
Rod & Piston
Piston Heat resistant aluminum alloy
Piston ring
Compression ring Two, chrome plated
Pi
ston r
i
ng
Oil ring One, combination type, chrome plated
Crankshaft &
Crankshaft One piece cast iron
Crankshaft &
Crankshaft
Bearing
Crankshaft main
bearing
Material Replaceable insert – aluminum alloy