(
MODEL
412
INDUSTRIAL
UNIT
Engtne.-Petrol,
four-stroke.
Air
cooled. Type, 412.
Maln
Dimensions.-Bore,
64'5
millimetres.
Stroke,
75
millimetres.
Cubic
capacity,
245
c.c.
B.H.P.-2'4
at 2,400
R.P.M.
Valves.-Type,
I\{ushroom.
Position, side
valve.
Tappet clearancer
:
EXHAUST
'0l0"
to
'012',
INLET
'008".
Timing:
EXHAUST
OPENS
48' before
bottom
dead centre,
CLOSES
9"
after top
dead centre.
INLET OPENS
17'
before top
dead
centre, CLOSES
52'
after
bottom
dead centre.
Camshaft.-Type,
cast
in one
piece,
driven
by
spur
gear.
Pieton.-Material,
low expansion
alloy. Number
of ringe,
4.
Gudgeon
pin fixing,
circlips.
Connectin§,
Rod.-Material,
steel. Type
of big endbearing,
white
metal,
steel
backed.
Crankshaft.-Number
of bearings,
2.
Type, ball.
Carburetter.*Make,
Zetith. Type
24 T-2.
Ignttton.-Magneto.
Make, Wico.
Type,
A.57682.
Tirning, 25"
beforo
top
dead
centre.
Drive,
direct
coupled. Sparking
plug,
size
14
milli-
metres.
Gap,'025'
LODGE-CN.
Lubricatlon
Syetem.-J.A.P.
dipper. Sump
capacity'
I
quart.
f,'uel
Tank
Capaclty.-l
gallon.
Fuel
Consumptlon.-'8
pints
per
B.H.P.
hour,
Engtne
Wel§ht.--{2
lbs.
(37
Kilogammes).
Rotatlon.-Looking
at take-ofi
shaft,
anti-clockwise.
RECONDITIONING
DIMENSIONS
Cyltnder
Bore.-Diameter
2'5635'
or 2'5835'.
Oversize
Pietons
Avallable.-+
'020'and
f
'040'.
Underslze
Bearin§s
Avatlable.-Connecting
rod, l'1150"
to l'1050".
RECOMMENDED
CLEARANCES
ON
RECONDITIONING
Clearances.-Crankshaft
and connecting
rod, big end,
'001"
to
'003'.
Side
clearances,
connecting
rod
and crankshaft'
'001'
to
'009'.
Gudgeon
pin and connecting
rod,
small end,
'0006" to
'0014'.
Piston.-On
diameter
of
piston
:
'0025'skirt,
'0125" top land'
Between
piston
rings ancl
grooves, '0025' to
'004'. Between
scraper
ring and
groove,
.001'
to'0025".
Pecn
4
MODEL
413
INDUSTRIAL
UNIT
Engine.-Petrol, four stroke.
Air coolcd.
1'ype,
,t/3.
Maln Dimensions.-Bore, 70
millimetres.
Stroke,
75
millimetres.
Cubic
capacity, 288 c.c.
B.H.P.-3.5 at
2,400
It.P.Nt.
Valves.-Type
Mushroom.
Piston,
side
val.ve. Tappet
clearances
:
EXIIAUST
'010" to
'012"
;
INI-IiT
'008'.
Timing:
IIXHAUST
OPENS 4Bo bcfore
bottom
clead centre,
CI-OS}iS
9"
after top
dead
centre. INLET Ol'IiNS
17"
be{ore top
dead centre,
CLOSES
52'
after bottom
dead centre.
Camshaft.-Type, cast
in one
piece, driven
by spur
gear.
Piston.-Material, Iow
expansion alloy.
Number
of
rings, 3. Gudgeon
pin fixing, circiips.
Connectln§ Rod.--'Material,
steel.
Type
of big
en<l bearing,
whito
metal, steei backed"
Crankshaft.-Number
of
bearings,
2. fype,
ball.
Carburetter.--1,{ake,
Zcnitir.
Type 24'l-2.
Ignition.--ltagneto. l'I;rl<e, Wico.
Type CJ.
936.
Timing,
25o
before
top
dead ccntre. I)rive,
direct
couplecl.
Sparking
plug,
siz;e
14
millimetres. Gap,'025"
I-riI)Gtt-CN.
Lubrication S-v*stem.-.J .A.I'].
dipper.
Sump
capacity,
I
quart-
Fuel Tank Capacity.--l
gallon.
Fuel Consumption.--'8
pints
per u.H.P.
hour.
Weight.--S3 lbs.
(i38
I(ilogrammes).
Rotation.-I-ooking at rake-olI
shaft,
anti-clockrvise.
RECONDI']TIONING
DIMI'NSIONS
Cylinder Bore.-DiiLmcter
2'77O5"
or
2'7905".
Oversize
Pistons Available.-
+
'020'
and
+
'040".
Undersize Bearings
Available.-Connectirrg
rod, 1'1150"
to
t'1050".
RECOMMENDED
CLEARANCES
ON
RECONDITIONING
Clearances.-Crankshaft
and
connecting
rod, big
end,
'001'
to
'003'.
Sicle
clearances,
connecting
rod
and cranksha{t,
'004' to
'009".
Gudgeon
pin and connecting
rod, small
end,
'0006"
to
'0014"
Gudgeon
pin and
piston, '0002" to
'0009".
Piston.-On rliameter
of
piston at right
angles
to
gudgeon pin: '006"
skirt,
'015" top
land. Betrveen
pistorr rings
and
grooves, '0035'to
'0055'.
Between
scraper ring
and
groove,
'0015" to
'0035'.
Pr,cn 5
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General