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B R I TI S H A N Z AN I 34 2 cc .
C O M PE T ITI O N U N ITW I N .
O P E RA T ING I NS T RUC T I ON S .
T h e c o mpe t i ti o n ' U N IT W IN' p ro v ide s a r ema r k ab l y g o o d b asi c
p e r fo r man c e a n d s h o ul d be u se d wi t h a mat c h ed hul l , i . e. a h u ll o f t h e
t y p e, siz e an d we i g ht , no t on l y t o ma t ch t h e m oto r , b u t t o be in k e ep i ng
w i t h t he c o nd i tio n s u n der w hi c h t h e o u tfi t is lik e l y t o o p e ra t e.
We
a r e a l way s pl e ase d to off e r a d vic e in thi s co n nec t i on .
I t s h oul d be
a p p re c iat e d t h at a l l m oto r s o f a g i ve n ty p e d e vel o p s u bst a n ti a lly t he
s a m e p owe r wh e n l e a vi n g t h e f a cto r y , a nd w i nn i ng r a ce s de p e nd s on t he
p i l ot ' s s k i ll in h a nd l ing h is cra f t , t uni n g h i s m o t or to d e ve l op m a xi m um
p o w er and f in d ing t he bes t pr o pel l e r t o s u i t t he c o mb i nat i o n o f t u n ed
e n g in e an d hu l l.
Ra c ing m ot o rs s h ou l d b e ca r efu l l y r un i n f o r a f ew
h o u rs at h a lf thr o t tl e , w i t h a n o c c as i ona l bu r st o f f u ll t h ro t tle .
F or
r a c in g in G re a t B r i ta i n t h e e x hau s t s y ste m mu s t n o t b e mo d i fi e d i n an y
way.
Al s o a dea d ma n th r o tt l e i s co m pul s o ry .
T h e se ope r a ti n g i n s tr u cti o n s a re b r ie f as i t i s a s s um e d
t h a t r aci n g p i lot s ar e fa m i li a r w i t h t he c o ns t ruc t i on and m ai n ten a n ce of
r a c in g mo t o rs .
F u rt h erm o r e, own e r t u nin g ma y ne c e ss i tat e so m e
d e p ar t ure f ro m th e s e i nst r u ct i ons .
A f ue l ta n k i s no t in c lud e d w i th t h e m oto r an d th e ow n er
m u s t f it h i s o wn t a nk eit h e r u nde r fo r ede c k o r ag a i ns t tr a n so m ac c o rd i ng
t o pr e fer e n ce .
A ca p aci t y o f on e or two g al l ons i s s ugg e s te d .
A f u el
l i n e w ith s hu t of f ta p mu s t b e ta k e n f rom b ot t om o f t a nk t o f l oat
c h a mb e r o f ca r bur e t to r .
T he fue l in tan k mu s t b e pr e ssu r i ze d to a
m a x im u m o f 2 l bs.
pe r sq . i n . e i th e r b y me a ns o f a car i nn e r t u b e
s t o we d un d e r f ore d e ck or f r om the p re s sur e fe e d t u b e f itt e d t o cr a n kc a se
n e a r m agn e t o b ase .
I f u s i ng the l at t er t w o p oin t s m u st b e n o ted :
(1)
A r ed u cin g va l ve m u st be f i tt e d i n pr e ssu r e l i ne f r om the
c r a nk c ase f ee d to t op of f u el tan k , a s it w il l be a pp r eci a t ed tha t
c r a nk c ase p re s sur e is app r o xi m ate l y 7 lbs . p e r s q . i n.
(2)
I n i ti a l p r e ss u re t o f i ll c a rb u ret t o r m ust b e p rov i d ed by
f i t ti n g a r ub b er t u be wit h sh u t o f f t a p t o to p of t an k .
P re s sur e by
m o u th wil l su f fic e .
T O ST A RT M O TO R
1.
M i x o i l a n d p e tro l th o rou g h ly in a se p ara t e c a n, i n t h e
p r o po r tio n of one i n t en o r t h ree q ua r ter s pi n t o f Wa k efi e l d
G r a de 'XL ' or oth e r f i rst c la s s e q u iv a len t , t o ea c h g a llo n of
p e t ro l .
A lw a ys f i lt e r m i x tu r e w h e n f ill i n g t ank .
A lth o u gh
t h e c o mpr e s si o n r a t io of t h is mot o r i s 12 t o 1 a f u el of 8 0
o c t an e ra t i ng or s t an d ard p re m ium g ra d e i s sa t isf a c to r y.
Us e
o n e p i nt o f o i l t o ea c h g a l lo n of p et r ol o r o n e i n ei g ht
p r o po r tio n fo r fi r s t s ix h o ur s .
2.
A s c er t ain t ha t fl o a t c ham b e r i s f u l l o f f u e l.
3.
C l o se car b u re t tor a ir cho k e b y me a n s o f c o n tr o l l e v er .
4.
O p e n t hro t t le abo u t o n e q u a rt e r.
5.
I n s er t kn o t o f st a r ti n g c o r d i n r i g ht not c h o f st a r te r di s c ;
c o i l i n c l o ck w ise d ir e cti o n a n d p u l l f orc i b ly .
W h e n m oto r st a rts , wh i ch s h ou l d b e af t er t w o o r t h r ee pul l s ,
o p e n a ir l e ve r gr a d ua l ly.
T h e s p e ed of m o to r is t he n
c o n tr o lle d by thr o t tl e le v e r.
B e s t p erf o r ma n ce m a y b e
o b t ai n ed w i th air l ev e r p a r tl y cl o s ed .
6.
7.
T o st a rt w a rm mot o r , i t i s on l y n e c es s ary t o s et t h ro t tle ;
c h o ke sho u l d n ot b e r e qui r e d.
G E N ER A L.
W a t er cir c u la t ion o n t his m ot o r i s ac c omp l i sh e d b y fo r war d
m o t io n of c ra f t a n d t h e m o t or mus t no t be o pe r ate d at low s pe e d, a s
o v e rh e ati n g w i ll r e su l t.
Af t er s t ar t ing , ge t th e bo a t o n pl a ne a s s o on
a s po s sib l e a n d c h e ck tha t wa t er i s e m erg i n g f rom o ut l et p i pe fit t e d t o
c y l in d er h e ad .
P r o pe l ler g ea r s a r e p r ote c t ed by a n e a sil y re p lac e a bl e
b r a ss she a r p i n f i t te d to t he pro p e ll e r b o s s.
T h e u n der w a te r ge a r
h o u si n g s h o ul d be l ub r ica t e d w ith e ng i ne o i l, cas t o r o il o r a lig h t h i gh
p r e ss u re g e ar oil .
S ee s p ec i al i n st r uct i o ns for t he Sil v e r A rro w
u n d er w ate r un i t.
T o pr e ven t mo t or s l ip p ing s id e way s , w e re c o mm e nd t h e
f i t ti n g o f a l ag s c re w in t ra n som t o s uit t he slo t pr o vid e d i n st e r n
b r a ck e t o f mo t or.
T h e b e s t t ran s o m h eig h t a n d m o t or ang l e f o r a n y
p a r ti c ula r co n dit i o n c an o n ly be f o un d by e xp e rim e n t, but a 1 4 " t r a ns o m
s h o ul d pu t th e ca v i ta t ion p la t e a b o ut one e ig h th o f a n in c h a b ove b ot t om
o f hu l l, w h ic h is a g o od s t ar t ing p oi n t f o r s h ort c ir c uit r ac i ng.
The
t h r us t bl o c k s hou l d b e ad j u st e d s o th a t m o t or is v e rt i cal w he n bo a t i s
p l a ni n g.
T h e b e st j e t s ize a nd nee d l e s ett i n g f or c a rb u ret t o r c an
o n l y b e a s c er t ain e d b y ex p e ri m ent a nd wil l va r y a c c or d ing t o t he d e gr e e
o f tu n ing , ty p e o f fu e l, a t mo s phe r i c c ond i t io n s, e t c.
A n um b er 1 1 0
n e e dl e je t is fit t e d a nd t h e t hro t t le sli d e t a per n ee d le i s a d jus t a bl e .
T h r ee mai n je t s, n u mb e rs 3 2 0, 330 a nd 340 a re sup p l ie d .
T he
c a r bu r ett o r i s an ' Am a l' M o no b loc t yp e 38 9 wi t h 1 . 3 /1 6 " d i a . c hok e .
T h e m a gne t o c o nta c t b r eak e r p o int s sh o uld b e m ain t a in e d a t
. 0 1 2" gap a nd the s pa r k p l u g g aps a t . 022 " .
Onl y pl u gs o f 1 4 mm.
t h r ea d an d ha l f a n in c h r e a ch sho u l d b e u s e d.
C h a mp i on L . A. 1 1 h a v e
p r o ve d ve r y s u cce s s fu l .
I f n ece s s ar y a s h ie l d s h o ul d be f it t ed t o
p r o te c t s p a rk plu g s f r om w a te r sp r a y.
E x p er i men t wi l l i n d ic a te t h e
b e s t i gni t i on tim i n g.
T h e L u cas m ag n eto i s n ot v a ri a ble a nd a g o o d
i n i ti a l s e t ti n g f o r m o tor s as shi p p ed fro m th e fa c t or y is 3 2 d egr e e s
a d v an c e o r 7/ 3 2" b e fo r e T . D .C .
E x ce s siv e ig n iti o n a d van c e c o uld c au s e
u n d ue str a i n a nd f a il u re o f e n gin e co m pon e n ts .
T h e m agn e t o g ear i s n ot
k e y ed to i t s s haf t an d th u s a l low s "p a rt t o ot h " v a r ia t ion .
S hou l d t h e
m a g ne t o s u f fe r im m e rs i on i t s h oul d be was h e d o ut w i th met h y la t ed s p ir i t
a n d d r ied f or abo u t t w o h o u rs in a lo w ov e n .
T h e c r ank s h af t is a b u ilt u p a sse m b ly all o w in g re n e wa l of c ra n kpi n s e t c.
W e do not r ec o mme n d o w ner s to und e r ta k e t h i s w ork , an d th e as s emb l y
s h o ul d be r et u rne d to our W or k s w h e n a tte n t io n is n ec e ssa r y .
W h e n o rde r i ng spa r e s, alw a y s s tat e se r ial n um b er o f m o tor .
A s ra c ing m ay imp o s e s uch u nu s ual a nd unf o r es e en s t re s ses ,
b y ac c ide n t o r ot h e rw i se, n o g uar a n te e ap p l ie s to m ot o rs u s ed for t hi s
p u r po s e.
Mo r e t h a n u sua l ca r e i s , h o wev e r , t ake n at all s ta g es o f
p r o du c tio n .
We r e se r ve t h e r igh t to alt e r s p eci f i ca t ion o r p ric e
w i t ho u t n o t ic e .
B R I TI S H A N Z AN I EN G I NE E RIN G CO .
L T D .,
H A M PT O N H I L L, MID D L ES E X.
' P H ON E : M O L ES E Y 2 6 9 0
F e b ru a ry 1 9 59
S p e ci a l U n d er w ate r Ge a r O i l 1 2 /6d . pe r qu a r t.
BRITISH ANZANI COMPETITION UNITWIN
MAINTAINANCE INSTRUCTIONS FOR MARK 2 SILVER ARROW GEAR HOUSING
T h i s s pec i a l u nde r w at e r u n i t i s s u i ta b le o n ly for r ac i ng
s e r vi c e. I t m ust b e t rea t e d w ith g re a t c a r e, reg u l ar l y l u b ri c ate d an d
k e p t s cru p u lo u sly c le a n e x t er n all y . A lwa y s r e mov e pr o pel l e r w hen m ot o r
n o t i n us e an d ne v e r a llo w th e we i g ht of m o to r to r es t on s ke g fi n .
L U B RI C ATI O N . A h e x ag o nal h ea d ed f i ll e r p l u g i s l o c at e d a t th e re a r o f
d r i ve sha f t X X Xin g fl a nge . L u bri c a nt is c o nt a ine d in a c o r ed pas s a ge
t h e e n tir e de p th o f g e ar h o us i ng i n a d dit i o n t o t h e t o rpe d o s u cti o n . A
d r a in plu g fi l l b e fo u nd n e ar ske g fi n . I t i s es s e nt i al t h at lub r i ca n t
b e ch a nge d af t er e v er y me e t in g . T h is is a ve r y s i m pl e op e r at i on, i t
b e i ng onl y ne c ess a r y t o r e m ov e bo t h f i lle r an d dr a i n p lug s so as t o
a l l ow all t he old o il to d r ai n ou t . R epl a c e d rai n pl u g a n d f i ll w i th
f r e sh oil t o w ith i n h a lf a n i n ch o f f i lle r pl u g l e v el . A n y p r efe r r ed
g e a r o il m a y b e u s e d, but i t m ust b e t hin i n v iew o f t he h i gh spe e d a t
w h i ch the s e g e ars o pe r ate . W e re c o mm e nd a ve r y l i g ht hig h pr e ssu r e g e ar
o i l , c ast o r o i l o r Du c kha m s K O .10 .
C O N ST R UCT I O N. The d es i gn o f t h is u n it is i n a d van c e o f an y t hi n g
p r e vi o usl y at t emp t e d, and r ep r ese n t s p rob a b ly the m in i mum f ro n tal a re a
c o m bi n ed w i th ext r e me sim p l ic i ty.
Ad j ust m e nt is p r ov i ded f or bot h dr i ve
s h a ft and p ro p ell e r s h aft g ea r s. F ul l vi e w o f ge a r m e sh i s p r ovi d e d b y
r e m ov i ng t h e s keg p la t e w h i ch is r e ta i ned b y a si n g le All e n s c rew .
G r e at car e mu s t b e ta k en w h en rep l a ci n g t h i s p lat e to see t ha t th e jo i nt
i s so u nd t o p r eve n t i n gre s s o f wa t e r. Us e jo i nti n g c o mpo u n d o n t h e
g a s ke t if n ec e ssa r y .
T h e p r ope l l er sha f t i s in t e gr a l w i t h i ts g e ar and i s b uil t
i n t o a su b - as s emb l y t o get h e r w ith i ts ass o c ia t ed r o ll e r t h r us t an d
r o l le r jo u r na l be a r in g s w i t hi n a s c re w ed s t ee l sl e e ve . T h i s a sse m b ly
c a n b e un s c re w ed f r om hou s i ng aft e r r e mov a l o f al l o y l ock i n g c ap ( r ig h t
h a n d t hre a d ) a nd l o ca t ing g ru b sc r e w. To r em o ve v e rt i cal g ea r sh a f t,
p r o ce e d a s fo l low s . F irs t wi t hdr a w p r ope l l er sha f t a s sem b l y a s
d e s cr i bed a bo v e, t h en rem o v e t he s i x c hee s e h e ad s c re w s w h i ch att a c h t he
t o p b e ari n g t o up p e r f ace o f b ear i n g. Th e ba l l b e a ri n g w h i ch is a
c o m bi n ed t h ru s t a n d j o urn a l t y pe s h ou l d c o m e a way w it h th e ca p an d
e x p os e th e th r ust c ol l ar w h ic h re t a in s th e sp l it c o tt e r i n it s sh a f t
g r o ov e . T h is cot t e r s hou l d b e li f t ed off . T h e t w o h a lve s of spl i t
c o t te r re m o ve d fr o m t h eir g ro o ve a n d t he g e ar sha f t w i thd r a wn dow n w ar d s.
T h e se gea r ho u sin g s a r e c a r ef u lly a ss e mbl e d a t ou r Wo r ks
a n d t h e g e a rs cor r e ct l y a d j us t ed.
Th e se a d ju s tme n t s s hou l d n o t b e
i n t er f ere d wi t h u n l es s ab s o lu t ely n ec e ssa r y . Adj u s tm e nts o f t he
p r o pe l ler s ha f t g e a r a re o b ta i ned b y m ove m e nt of t h e s cre w e d s lee v e . It
w i l l p rob a b ly be n e ce s sar y to re- d r il l fo r th e lo c a ti n g g r u b s cre w .
A d j us t men t of the d ri v e s h a ft gea r is obt a i ne d by s hi m s b e t we e n t h e t o p
b e a ri n g a n d c a p a n d t h e u p p er fac e of hou s i ng .
C O O LI N G W A T ER . N o wa t er p u mp is i n co r por a t ed as i t i s as s u me d th a t
r a c in g mo t o rs wil l no t be o pe r ate d at les s th a n f i f te e n m i l es per h ou r .
W a t er und e r p r ess u r e o f b o a t s pee d en t ers t he dri l l ed hol e at for w a rd
e n d o f to r p ed o an d fi l ls t h e p ass a g e l ead i n g t o e l b ow at t o p f lan g e .
D R I VI N G D E P TH . It i s i mpo s s ib l e t o gi v e d e f in i te a d vi c e f o r p r ope l l er
d e p th or a n gl e of m ot o r a s th i s i s a m att e r f o r e x p er i men t to sui t an y
p a r ti c ula r hu l l, w a te r co n d it i on, w ei g ht o f p i lot a nd dri v i ng sty l e . A
s a f e i nit i a l s ett i n g i s w i t h c avi t a ti o n p l a te ¾” a b ov e bo t t om of h u ll
a n d m o tor v er t ica l wh e n h u l l i s p l a ni n g. T he sta n d ar d B. U . p r ope l l er
h a s b e en f o un d be s t f o r g e n er a l u s e w i th c l ea n “B ” mo t or.
F E B RU A RY 1 9 59
B R I TI S H A N Z AN I EN G I NE E RIN G CO .
H A M PT O N H I L L, MID D L ES E X.
' P H ON E : M O L ES E Y 2 6 9 0
L T D .,
February 1959
COMPETITION UNITWIN
MARK TWO SILVER ARROW UNDERWATER UNIT.
SPARE PARTS LIST.
Part No.
Description
No.Off
SCH.2615
SCH.2616
SCH.2676
SCH.2617
SCH.1729
SCH.1724
SCH.2618
SCH.2620/1
SCH.2621
SCH.2622
SCH.2624
SCH.2623
SCH.2671
SCH.2114
SCH.2685
SCH.2677
SCH.1837
SCH.2619
SCH.2626/1
SCH.2629
SCH.2630
SCH.1829
SCH.2625
SCH.2632
SCH.1839
SCH. 483
SCH. 573
SCH.1222
SCH. 221
SCH. 476
SCH.1290
SCH.1840
SCH.1872
SCH.2633
SCH.2635
SCH.1989
SCH.1286
SCH.1288
SCH.1877
SCH.1890
SCH.1738
SCH.1776
SCH.1226
SCH.1997
Gear Housing
1
Gear Housing Skeg Cover
1
Skeg Cover Gasket
1
Skeg Cover Fixing Screw
1
Skeg Cover Dowel Pin
1
Gear Housing Core Plug
1
Drive Shaft and Pinion
1
Drive Shaft Roller Bearing
1
Drive Shaft Top Bearing
1
Drive Shaft Split Cotter
Pair
Split Cotter Retainer
1
Top Bearing Cap
1
Top Bearing Cap Screws
6
Cap Screw Spring Washer
6
Top Bearing Oil Seal
1
Top Bearing Adj. Shim
As req.
Oil Drain Plug
1
Propeller Shaft and Pinion
1
Propeller Shaft Bearing Sleeves 1
Thrust Bearing Track Washer
1
Thrust Bearing Adj.Nut
1
Thrust Bearing Locknut
1
Propeller Shaft Oil Seal
2
Gear Housing End Cap
1
Propeller Shear Pin
1
Propeller Nut
1
Propeller Nut Split Pin
1
Drive Casing Stud
3
Drive Casing Stud Nut
3
Drive Casing Stud Washer
3
Drive Casing Gasket
1
Water Inlet Elbow
1
Water Inlet Hose
1
Exhaust Pipe Lower
1
Exhaust Pipe Flange Gasket
1
Exhaust Pipe Flange Screws
1
Oil Filler Plug
1
Oil Filler Plug Washer
1
Propeller Class “B”
1
Propeller Class “A”
1
Upper Drive Shaft
1
Drive Shaft Coupling Top
1
Drive Shaft Coupling Bottom
1
“C” Spanner for End Cap
1
B R I TI S H A N Z AN I EN G I NE E RIN G CO . LT D .
H A M PT O N H I L L, MID D L ES E X.
' P H ON E : M O L ES E Y 2 6 9 0
Price Each
£. s. d.
8. 10.
1. 15.
1.
2.
3. 10.
16.
15.
4.
5.
1. 1.
5.
1.
3. 15.
1. 15.
3.
6.
2.
5.
16.
3.
1.
1.
2.
3.
15.
2.
3. 17.
3. 17.
3. 0.
11.
13.
3.
0.
0.
0.
3.
6.
6.
0.
6.
0.
6.
0.
6.
6.
6.
6.
6.
0.
0.
0.
0.
6.
0.
6.
6.
2.
0.
2.
8.
4.
3.
1.
9.
4.
0.
9.
8.
2.
2.
0.
0.
0.
0.
0.
4.