Yamaha Y-30C User manual

.YAMAHA MOTOR CO .• LTD.
Copynght
All rights reserved
No part of this publication may
reproduced without permission
Y-30C
Pnnted mJapan
Jufv 1979
GJ0-28199-00

Y-30C 1
TABLE OF CONTENTS
1. GENERAL DESCRIPTION .................................................................................. 4
1-1 PRINCIPAL DIMENSIONS AND FIGURES................................................................................ 4
1-2
SAIL PLAN................................................................................................................................... 5
1-3 RIGGiNG LIST ............................................................................................................................. 7
1-4 DECK PLAN................................................................................................................................. 9
1-5 ACCOMMODATIONS .................................................................................................................. 11
1-6 THROUGH-HULL FITTINGS .......................................................................................................12
1-7 MAST FITTINGS.......................................................................................................................... 13
1-8 BOOM FITTINGS......................................................................................................................... 14
1-9 LIST OF STANDARD ITEMS TO BE ON BOARD ...................................................................15
2. SPARS AND RJGGING....................................................................................... 16
2-1 STEPPING MAST ........................................................................................................................16
2
.. 2 STANDING RIGGING ADJUSTMENT ........................................................................................17
2-3 HALYARD LEAD..........................................................................................................................20
2-4 MAIN SHEET LEAD....................................................................................................................20
2-5 MAIN SHEET TRAVELLER ADJUST .........................................................................................20
2-6 JIB SHEET LEAD ........................................................................................................................ 21
2-7 CUNNINGHAM............................................................................................................................. 21
2-6 BOOM VANG........... ., .................................................................................................................. 21
2-9 MANUAL BACKSTAY TENSIONER...........................................................................................22
2-10 REEF LINE AND REEFING....................................................................................................... 22
3. ELECTRIC SYSTEM ........................................................................................... 24
3-1 BATTERY .................................................................................................................................... 24
3-2 BATTERY SWITCH..................................................................................................................... 24
3-3 ELECTRICAL SWITCH PANEL ................................................................................................. 25
3-4 BILGE BLOWER......................................................................................................................... 25
3-5 ELECTRICAL SYSTEM DIAGRAM ............................................................................................ 25
4. ENGINE................................................................................................................ 28
4-1 BEFORE STARTING ENGINE ................................................................................................... 28
4-1-1 FUEL SUPPLY ......................................................................................................................... 28
4-1-2 FUEL SYSTEM DIAGRAM OF STANDARD MODEL .......................................................... 29

Y-30C 2
4-1-3 OTHER CHECK POINTS.........................................................................................................30
4-2 STARTING ENGINE..................................................................................................................... 31
4-2-1 ELECTRfC STARTING ............................................................................................................. 31
4-2-2 HAND STARTING .................................................................................................................... 31
4-3 WARM UP ....................................................................................................................................32
4-4 POINTS TO CHECK DURING OPEAATlON ............................................................................. 32
4-5 SECURING ENGINE....................................................................................................................32
PRACTICAL NOTE..................................................................................................................... 33
4-6 SHAFTING....................................................................................................................................35
5. PLUMBING SYSTEM.......................................................................................... 39
5-1 PLUMBING SYSTEM DIAGRAM........ ~ ...................................................................................... 39
5-2 FRESH WATER TANK ............................................................................................................... 40
5-3 GALLEY........................................................................ ~ .............................................................. 40
5.4 HEAD ...........................................................................................................................................40
5-5 MANUAL BILGE PUMP............................................................................................................. 42
5-6 COCKPIT DRAIN ........................................................................................................................ 42
5-7 ANCHOR WELL.......................................................................................................................... 42
5·8 ELECTRIC BILGE PUMP (optional) ......................................................................................... 42
5-9 SECOND WATER TANK (optional) .......................................................................................... 43
5-10 PRESSURE WATER SYSTEM (optional) ............................................................................... 44
5-11 HOT WATER SYSTEM (optional)...........................................................................................45
6. MAINTENANCE TIPS .........................................................................................46
6·1 FfBERGLASS SURFACES ......................................................................................................... 46
6-2 STANDING RIGGING AND HALYARDS................................................................................... 47
6-3 SPARS......................................................................................................................................... 47
6-4 SAILS........................................................................................................................................... 47
6-5 TEAK ........................................................................................................................................... 47
6-6 HARDWARE ................................................................................................................................ 47
6-7 BATTERY .................................................................................................................................... 47
6-8 ZINC-RING .................................................................................................................................. 48
6~9 CRADLE ...................................................................................................................................... 49

Y-30C 3
7. MISCELLANEOUS...............................................................................................50
7-1 PEDESTAL STEERING SYSTEM (optional)............................................................................. 50
7-2 STEERING SYSTEM OF U.S. MODEL..................................................................................... 51
7-3 DOUBLE HALYARD SYSTEMS (optional) ............................................................................... 53

1. GENERAL DESCRIPTION:
1·1. PRINCIPAL DIMENSIONS AND FIGURES:
DESIGNER
BUILDER
RIG
L..O.A.
L.W.L.
BEAM
DRAFT, STANDARD
SHOAL (option)
TOTAL HEIGHT
(Above the waterline)
MAST LENGTH
HEAD ROOM
DISPLACEMENT
BAlLAST
TOTAL SAll AREA
(100% fore 6 + main sail)
BERTHS
WATER CAPACITY
ENGINE
1-HA, RATING OUTPUT
CONTINUOUS RATING
OUTPUT
REDUCTION RATIO
PROPELLER ROTATION
CRANKSHAFT ROTATION
FUEL CAPACITY
SPEED, MAX
SPEED, CRUISING
CRUISING RANGE
YAMAHA DESIGN TEAM
YAMAHA MOTOR CO., l TO.
MAST HEAD SLOOP
8.97m
29ft
Sin
7.20m
23ft
7 ftln
3.23m
10ft
7in
1.75m
5ft
91n
1.40m
4ft 71n
12.47 m
40ft 11 In
10.87m
35ft Sin
1.93m
6ft
4tn
3,450 kg 7,6061bs
1,300 kg
2,8661bs
36.27 sq m
390.4 sqn
MAIN CABtN
3
FO'CSLE
2
QUARTER BERTH 2
155 liter 41 US gals
YANMAR YSM-12 4CVCLE 1 CYUNOER DIESEL
'12 HP !3.000rpm
10 HP/3,000rpm
2:1
COUNTER-CLOCKWISE (viewed from astern)
COUNTER-CLOCKWISE (viewed from astern)
58 titer
abt 6.6 knots
abt. 5 knots
abt. 275 natutical miles/5 kt
15 US gals
• SPECIFICATION SUBJECT TO CHANGE WITHOUT PRIOR NOTICE
Y-30C 4
J£1V4 '"'t
~ (l/11 Jt. f ,.J~ '

I
I
I
i
I
Y-30C 5
1-2. SAIL PLAN:
1-2 .. 1. SAILS:
MAiN
#1 GENOA
#2GENOA
#1 JIB
#2Jf8
-;.Jl'
} ) .
STORM JIB ~,. _., ....
,.. .
SPINNAKER
lOO%Fore~:.
NOTE: l}
AREA
sqm
(sq ft)
15.00
(161.46)
32.47
(349.51)
28.94
{311.51)
23.36
(251.45)
15.84
(170.50)
6.53
( 70.29)
21.27
(228.95)
LUFF FOOT
lEECH
LPG
m m m m
(ft)
(ft) (ft) (ft)
10.00 3.00 10.40
(32.81) ( 9.84) (34.12)
11.70 5.96 11.00 5.55
(38.39) (19.55) 36.09) (18.21)
11.35 5.58 10.40 5.10
(37.24) (18.31) {34.12) (16.73)
10.50 4.94 9.45 4.45
(34.45) (16.21) (31.00} (14.60)
8.80 4.13 7.65 3.60
(28.87)
(13.55) (25.10) (11.81)
6.70
3.10
4.70
1.95
(21.98) (10.17)
(15.42)
( 6.40)
11.47 6.66 11.47
(37.63} (21.85) (37.63)
Material: DACRON/TEA
2)
SPINNAKER FOOT· S YLENE except NYLON spinnaker
3)
STA . MWMAX (IO
WEIGHT
oz
8 STANDARD
6
OPT tON
8 OPTlON
8 STANDARD
10
OPTION
10
OPTION
1.2
OPTION
4)
NDAAO SAILS MAY VA .. . R. measurement)
WEIGHT: oz;sqYrd RY ACCORDING TO REGION.
1 .. 2·2 DAfT
· £Ns:
TOp
MIDDLE (2)
o.soom
0.660m
19 In 11116
BOTTOM
0.60om
26;n
23Jn 5/B

0
~
-
..,..
Q
Fig. 1 SAIL PLAN
SMW 6.66
(MAX)
J3.70
Y-30C 6

Y~30C 7
1-3. RIGGING LIST:
1·3 .. 1. STANDING RIGING:
LENGTH DIA. TYPE
m
mm
HEAD STAY 1 11.558 6 1 X 19
BACKSTAY 9.963 6 1 X
19
BACKSTAY (SPLIT PART) 2 1.810 5 1X 19
MJOSTAY (INNER FORESTAY) 5.745 5 1 X 19
UPPER SHROUDS 2 10.810 6 1 X
19
LOWER SHROUDS 2 5.689 5 1 X 19
NOTE: LENGTH
~(C- lt=lt ===:=t
c:

1-3·2. RUNNING RIGGING:
LENGTH DIA. COLOR
TYPE
m
mm
MAIN SHEET 1 16 12
REO 1/4 Braided Poly-
JIB SHEET 2
14 12
propytene
YELLOW 1/4
SPIN. SHEET 2 18 12 GREEN
1/4
SPIN_ FORE GUY 1 11.5 10
GREEN
1/8
MAIN HALYARD (TAIL) 1 16 10
REO 1/4
JIB HALYARD (TAIL) 1 16
12
YELLOW
1/4
SPIN. HALYARD
29.5 I
1/8
1 12 'GREEN
BOOM LIFT (TAIL) 1 13.5 6 RED
1/8
SPIN. POLE LIFT 1
20
8 GREEN
1/8
CUNNINGHAM #1
1 1.5 6
RED 1/B
CUNNINGHAM #2
1 2.0
8 RED 1/8
MAIN SHEET TRAVELLER ADJUST
1 5 8 REO
1/8
BOOM VANG LINE 1 8
10 RED 1/4
REEF POINTS 8 1.2 6
WHITE
REEF LINE #1
1 7.5 B WHITE
REEF LINE #2 1 i 1.0 8
WHITE
SPIN. POLE ADJUST 1 6.5 8 GREEN
1/8
MAIN HALYARD
1 10.60 4
s.s.
7x19
JIB HALYARD
1 11.30 5
s.s.
7x 19
BOOM LIFT 1 11.08 2.5
s.s.
1 X 19
LANYARD (for SETEE BERTH) 2 7 8
BROWN
LANYARD (forCANVAS LEE BOARD
4 0.6
6 BROWN
of PILOT BERTH)
NOTE: "RED 1/4" rope has 1/4 of strands colored red.
• SPECIFICATION SUBJECT TO CHANGE WITHOUT PRIOR NOTICE

Y-30C 9
1-4. DECK PLAN:
@
@
@ @
®
<D
®
®
@
®
® @
<1>
@
®
@
@
®
@
@ Ill
@ @
@@
@
@
®
® ®
®
®
(i)
@ ®
@ ®
Fig. 2 DECK PLAN (1)

Fig. 3 DECK PLAN (2)
1. ANCHOR WELL
2. FORWARD
HATCH
3. SKYLIGHT HATCH
4. SEAHOOD
5. COMPANION HATCH
6. STOWAGE BENEATH
7. LAZARETTE
8. l.G. CYLINDER STOWAGE
9. MANUAL BILGE PUMP
10. HEAD STAY FITTING
11. BOW· ROLLER
12. CHAIN PLATE
(for
upper & lower shrouds)
13. MIOSTAY FITTING
14. JIB SHEET TRACK
l5. CAR/!ILOCK (2}
i6. SHEET STOPPER (double)
17. SHEET STOPPER (triple)
18. QUADRUPLE TURNtNG BLOCK (2)
19. BOW PULPIT
20. STERN PULPIT
21. LIFELINE STANCHION (6)
22. LIFELINE (7)
Y-30C 10
23. TOE RA~L
24. MAST STEP
25. THRU-OECI< (lor mast wiring)
26. MOORING
CLEAT {4)
27. PORT
28. PORT
29. TANNOY VENTILATOR
30. COWL VENTILATOR (4)
31. REMOVABLE SEAT (2)
32. HANDRAIL
33. SPINNAKER POLE
34. EYE PLATE (for fore guy)
35. FAIRLEAD (for fore guy)
36. CLEAT {4) (for spin. & }lbsheet)
37. WINCH 12) (for jib sheet)
38. WINCH (2) (for epin. aheet)
39. WINCH (2) (for halyard)
40. TILLER EXTENSION
41. COMBINAT~ON LIGHT
42. STERN UGHT
43. WATER FlLLER CAP
44. FUEl. FILLER CAP

Y-3oc ,1
l. BATTERY
2. BA TTEAY STOWAGE
3. CABtN SWITCH
4 S liGHT
. WITCH PANE
5. ENGINe C l
6. FIJEL TAN~MPARTMENT
7. E/G COOIIN~5B litert15gals)
8. STUFFING- BO>cSEA WATER INTAKE
9. PROP. SHAJ=:r 8EA
(Grease bet AJNG
10 HE.Ao oreevery check-out)
11. HEAD DISCHARGE V
12. HEAD INTAKE VALVtlVE.
13. ELECTRIC BILGE PUMP (OptlooJ
14. WATER TANK (2} (One Is optlonar)
15. WATER TANK SELECT VALVES
(With the optional water tank only)
16. ICE BOX (80 liter/21 gals)
17. GALLE:V SINKS
18. GALLEY STOVE SPACE
19. FOLDING CABIN TABLE (Removable)
20. HEAD SINK (On slide)
21. FAUCET (Shower head,
22. QUARTER BERTH
23. CHART TABLE
24. HEAD SINK DISCHARGE VALVE
25. GALLEY SINK DISCHARGE VALVE
26. SEA WATER INTAKE VALVE.
27. SHELVES and LOCKER
28. SETTEE BERTH
29. FOLDING PILOT BERTH
Fig. 4 ACCOMMODATlONS
• SPECIFICATION SUBJECT TO CHANGE WITHOUT PRIOR NOTICE

1-6. THROUGH-HULL FITTINGS:
STARBOARD SIDE:
1. Anchor welt drain (No shutoff)
2. Sea water intake for galley sink (1 /2" valve}
3. Galley sink drain (1" valve)
4. FWD cockpit drain (1" 1/4 valve)
5. Propane cylinder stowage drain (No shutoff)
PORT SIDE:
6. Head lntake{1/2" valve)
7. Enginecooling sea water Intake ( 1/2" valve)
8. Head sink drain {3/4" valve)
9. Head discharge(1'1 1/4 valve)•
TRANSOM:
10. AFT cockpit drain (No shutoff)
11. Engine exhaust (No shutoff)
Fig. 5 THROUGH-HULL FfTTINGS
• EXCLUDE U.S.A.
MODEL
Y-30C 12

Y-30C 13
1-7. MAST FITTINGS:
BOOM UFT
JlB HLYRD
"1. UPPER SHROUD TERMINAL
2. FAIRLEAO (forSPIN. HALYARD)
3. SHEAVE BOX {for SPIN. POLE LIFT)
4. MIOSTAY TERMINAL
5. SPREADER BRACKET
6. LOWER SHROUO TERMINAL
7, SPIN. POLE TRACK
8. SPIN. POLE TRACK CAR
9. CLAM CLEAT (for SPIN. POLE ADJUST)
1Q BRACKET t~rGOOSENEC~
11. EYE PLATE (forCUNNINGHAM)
12. CLEAT (for BOOM TOPPING LIFT)
13. HEE.L OF THE MAST with 6 sheaves
14.
MAST STEP
@)--
o--t~------ <D
:tl I
_ _j_
~--C3)
~~--(-~
@Jj------:ID
9:-j----@
- -----~----
------®
®------t
Fig. 6 MAST FITTINGS

Y-30C 14
1-8. BOOM FITTINGS~
Fig. 7 BOOM FITTINGS
1. GOOSENECK
2. BOOM END
3. CLEAT {for No.1 REEF LINE)
4. CLEAT {tor CLEW OUTHAUL)
5. CLEAT (lor No. 2REEF LINE)
6. EVE PLATE {for BOOM VANG)
7. EYE PLATE (for MAIN SHEET)
8. EYE PLATE (forREEF LINE)
9. SHEAVE (for REEF LINE}
10. CLEW OUTHAUL
11. SHACKLE
12. CLEW OUTHAUL. TAIL OF

,..
I
Y-30C 15
1-9. LIST OF STANDARD ITEMS TO BE ON BOARD;
(1) MAST ASSY.
(2) BOOM ASSY.
(3) SPINNAKER POLE ASSY.
(4) MAIN SAIL (with bag)
(5) JIB SAIL (with bag)
(6)
BOW and STERN PULPIT ASSY. (with bolts}
(7) LIFE LINE and STANCHION ASSY.
(8) MISCELLANEOUS:
A. LINES:
1) MA1N SHEET wi1h BLOCKS and SHACKLES
2) MAIN SHEET TRAVELLER ADJUSTMENT LINE
3) JtB SHEET
4) REEF LINE
5) REEF POITS
6) SPINNAKER SHEETS with SNAP SHACKLES
7) SPINNAKER FOREGUY with SANP SHACKLE
8) CUNNINGHAM HAULER ASSY.
9) BOOM VANG ASSY.
B. FITTINGS AND GEARS:
1) BLOCK and SHACKLE (for SPIN. SHEET)
2) BLOCK and SHACKLE (for FOAEGUV)
3) GENOA CAR ASSY. (RUNNING BLOCK)
4) WINCH HANDLE
5) COWL VENTILA TOR
6) BOAT HOOK
7) BILGE PUMP HANDLE
8) BATTENS (4)
9) HOSE
CLAMP (STEEL)
10) GREASE GUN (for PROP. SHAFT BEARING)
C. ENGINE:
1) ST AATING KEY
2) STARTING HANDLE
3) TOOLS
4) OPERATION MANUAL
5) BATTERY (12V x 70A)
D. OWNER'S MANUAL
1 set
1set
1 set
1 set
1
2
2
8
2
1
1 set
1 set
2sets
1set
2
2
4
1
1
1set
2
1
2
1
1 set
1
1
•THE ITEMS MAY VARY tN DIFFERENT COUNTRtES and ACCORDING TO THE ORDER.

Y-30C 16
2. SPARS AND RIGGING:
2·1. STEPPING MAST:
(1} Preparation:
Keep unnecessary staff out of your way and check all parts carefully. Make sure the standing
rigging
ts not tangled, halyards are property running and all turnbuckles are slacked.
Spray WD-40 on all turnbuckles.
(2) Setting the Spreaders:
Securethe spreaders to the spreader brackets.
Secure the tips of the spreaders to the upper shrouds (See Fig. 8).
NOTE: 1) A SPREADER
SHOULD BE ADJUSTED SO THAT THE ANGLES BETWEEN THE
SHROUD AND SPREADER ABOVE AND BELOW ARE EXACTLY EQUAL (see Fig. 8)
FAILURE TO DO THIS CAN CAUSE THE SPREADER TO SliP WHtCH COULD
RESULT IN THE LOSS OF THE MAST.
2) TAPE THE SPREADER TIPS AND BRACKETS WITH INSULATING TAPE FOR
SECURITY.
(3) Stepping the Mast:
By using a crane, step the mast on the mast step. Secure all turnbuckles, but leave the stand-
ing rigging snug. Set the upper shroud to theforward holeof chain plate and the lowershroud
to the aft hole of the same.
Set the clevis pins so that the cotter p~ns are Inboard.
NOTE: WATCH THE ACTION OF THE TOGGLES THAT THEY DON'T BEND THE TURN-
BUCKLES.
(4) Securethe Heel of the Mast:
Secure the heel of the mast to the mast step by using the securing bolt and nut.
Fig.8

,..
Y-30C 17
(5) Connect Electric Wire:
Through the thru-deck, connect the electric wire(s) to the junction just forward of the
mast support In thecabin.
NOTE: WHEN YOU TAKE THE MAST OFF, DON'T FORGET TO DISCONNECT THE ELEC-
TRIC WIRE OF THE MAST FIRST.
2-2. STANDING RIGGING ADJUSTMENT:
Our masts are built to withstand any normal usage. but improper tuning or handling can cause
probtems. Rigging, as well as tuning, becomes all important when setting up the mast because of
the lightweight section we use. A knowledgeable person should oversee the rigging and tuning so
as to eliminate the possibllty of an eccentric load which might occur with an Improperly loaded
shroud.
The following article. therefore. Is to give you a hint on how to proceed
on the adjustment of the
standing rigging.
NOTE: SPECIAL ATTENTION SHOULD BE GIVEN TO THE INITIAL STRETCH OF THE
UPPER SHROUDS AND A FURTHER GRADUAL STRETCH OF THE WIRE OVER
THE FIRST FEW HARD RACES OR HARD WEATHER SAILS.

Y·30C 18
2-2-1. The Rake of the Ma•t:
The rake of the mast should be determined according to the helm of the boat under sail. But you
may start with our recommended rake- 0 degree.
Ad}ust the head stay and back stay to bring the mast in the position so that the distance between the
rower end of the terminal screw fitting of the back stay and the after most of the deck reaches 2,070
mm (see Fig. 9)
This Is a temporary setting. Do not set up thestays too tight, rather start with slack stays.
You will have to check the rake after you have adjusted the tension on the head stay and backstay.
Lower terminal screw
of the bac1<stay
~
c;:,
fp-OECK
Fig. 9
2-2-2. The Adju1tment ot the Head Stayand Backstay;
Fig. 10
UPPER SHROUD
LOWER SHROUD
(TENSION CHECK POINT)
Set up the head stay and backstay taut about evenly, and pull the stays by means of a spring bal-
ance at right angles to them at the point of the height of 1 m 500/4 ft 11 in from the pins of their deck
fittings.
Adjust the turnbuckles so the head stay has !~_mm/3/4 in of play at 10 kg/22 lbs load and the
backstay has 27 mm/1 in 1/8 of play at the same road (see Fig. 11 ).
Secure the turnbuckle locknuts of the head stay and back stay.
Fig. 11

Y-30C 19
2-2-3. The Adjustment of the Upper Shrouds~
Adjust the upper shrouds until the masthead Is equal distant from each chalnplate (see Ftg. 12}.
,.-. Usethe main halyard or a steel tape measuretocheck the athwarshlp alignment.
Set up the shroudsto have 30 mm/1 in 1/4 of play(see fig. 12-2).
UPPER SHROUD
Flg.12-1
Fig. 12-2
2-2-4. The Adjuetment of the Mldetay:
Set up the mldstay (inner forestay) untU ft puUs the mast forward 25 mmtt in at the spreader
brackets.
This figure may vary
but should be between 20 mm to 40 mm according to the cut of the main sail.
The play of the mldstay ts 70 mm/2 in 3/4.
2-2-5. The Adjustment of the Lower Shrouds:
Set up the lower shrouds tight until they start to pull the mast aft.
Theplay of the lower shrouds will be 32 mm/1 In 1/4.
NOTE: 1) SIGHT UP THE MAST WHILE THE BOAT IS UNDER WAY.
IT SHOULD BE STRAIGHT IN ITS GROOVE AND LEEWARD SHROUDS SLACK
WHEN ON THE WINO.
2) REMEMBER. DO NOT TIGHTEN THE STANDING RIGGING MORE THAN NECES-
SARY. OTHERWISE, HULL DAMAGE MAY RESULT.
3) DO NOT ATTEMPT, OR AT LEAST BE VERY CAUTIOUS TO CORRECT MAST
CURVATURE UNDER WAY. RIGGING
ON THE LEEWARD SIDE IS NORMALLY
QUITE SLACK WHEN A BOAT
IS HEELED, AND IT IS EASY TO ADJUST IT TOO
TIGHT WHICH CAN DESTROY THE PROPER TUNE AND PUT A GREAT STRAIN
ON THE BOAT.
4) THE HEAD OF THE MAST SHOULD NOT "HOOK •• TO WINDWARD.
IF NOT STRAIGHT, lT WOULD BE MORE DESIRABLE TO HAVE THE HEAD
•