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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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