2-29
Outboard Rigging Guide - 2001
Jet Drive Eng. Mtg., Maintenance,
Shift Cable Instruction, Service Info.
If you have trouble locating these impellers
on the market, contact your dealer.
Some calls have been received regarding dif-
ficulty removing the impeller. The impeller
doesn't corrode with the shaft because there is
a delrin sleeve separating them. What can
happen, however, is that the driving torque
causes the flat on the shaft to "cam" or wedge
the key in the impeller.
To relieve this wedging, rotate the impeller
on the shaft until the keyway in the impeller
is perpendicular to the flat on the shaft. This
can be done with a soft hammer on a block of
wood, or by using a C-clamp on one blade
and bumping the clamp.
The impeller is now free to pull it. If neces-
sary, use two wood levers, about 3/4" x
1-1/2" x 12", wedged under the blades against
the housing flanges to assist with removing
the impeller.
9.
Some larger displacement jet drives have
experienced a performance problem above
4500rpm up to 5500rpm. On affected units,
there may be little or no change in boat speed,
only more noise. What may be happening is
impeller cavitation. This can happen if the
impeller liner is pushed too far into the foot.
Look up into the jet from the bottom of the
foot. If the liner is pushed too far in, there is
a lip that the water must go around. To correct
the problem, remove the grates and grind
down this lip to make a smooth path for the
water.
Overhaul Procedures
NOTE: It is recommended that these procedures
be performed by only your authorized Yamaha
Outboard Motor Dealer.
Disassembly
Refer to “Assembly and Installation” (page 2-23),
and reverse the procedures outlined here.
Bearing Housing
1.
Remove the large beveled circlip from the
bearing housing. Gently warm the housing
with a torch until it is just too hot to comfort-
ably touch.
Do not apply too much heat because the seals
may be damaged.
2.
Holding the driveshaft vertically, bump the
impeller end of the shaft against a wooden
block until the housing slides down off the
bearings.
3.
Note the direction of thrust faces of the bear-
ing(s), and press the bearing(s) off the drive-
shaft. Leave the round thrust ring on the shaft
unless it is damaged. Remove the seals from
the bearing housing and upper seal housing.
Clean all parts thoroughly and remove all
burrs.
NOTE: The inner seals are located on both sides
by spiral seal-retaining rings that must be
removed prior to extraction of the inner seals.
4.
FOR 40 AND 50 MODELS ONLY:
Before pressing on the collar, first, install the
coated thrust washer with the gray Teflon
coating facing the bearing. Note the direction
of the thrust face, and press the new bearing
onto the shaft, pressing against the inner race
only. Press against the thrust ring, locking it
in its groove.
FOR 90 AND V4/V6 MODELS ONLY:
Using Yamaha special tool #YB-06075, note
CAUTION:
Summary of Contents for T8
Page 2: ......
Page 9: ......
Page 35: ......
Page 37: ......
Page 61: ......
Page 63: ......
Page 65: ...2 2 Outboard Rigging Guide 2001 Engine Mounting Dimensions...
Page 67: ...2 4 Outboard Rigging Guide 2001 Engine Mounting Dimensions...
Page 71: ...2 8 Outboard Rigging Guide 2001 Transom Mounting Patterns 25HP 2 Cylinder...
Page 72: ...2 9 Outboard Rigging Guide 2001 Transom Mounting Patterns 25X3 3 Cyl 30HP 40HP Manual Tilt...
Page 109: ......
Page 111: ......
Page 128: ...3 17 Outboard Rigging Guide 2001 Switch Panels Oil Lamp Panel Assembly T9 9ELR 6G8 83530 00 00...
Page 155: ...3 44 Outboard Rigging Guide 2001 Boat Wiring Diagrams T9 9 with 703 Control...
Page 156: ...3 45 Outboard Rigging Guide 2001 T9 9 with Switch Panel...
Page 177: ...3 66 Outboard Rigging Guide 2001 After Market Dash Wiring...
Page 178: ...3 67 Outboard Rigging Guide 2001 COMPLETE BOAT WIRING DIAGRAMS 70 90HP F80 F115...
Page 179: ...3 68 Outboard Rigging Guide 2001 Complete Boat Wiring Diagrams V4 V6 Single Engine...
Page 180: ...3 69 Outboard Rigging Guide 2001 Complete Boat Wiring Diagrams V4 V6 Single Engine Cont d...
Page 181: ...3 70 Outboard Rigging Guide 2001 Complete Boat Wiring Diagrams V4 V6 F115 Dual Engine...
Page 182: ...3 71 Outboard Rigging Guide 2001 Complete Boat Wiring Diagrams V4 V6 F115 Dual Engine Cont d...
Page 183: ...3 72 Outboard Rigging Guide 2001 Complete Boat Wiring Diagrams V6 HPDI Single Engine...
Page 184: ...3 73 Outboard Rigging Guide 2001 Complete Boat Wiring Diagrams V6 HPDI Dual Engine...
Page 185: ......
Page 187: ......
Page 236: ......
Page 242: ...5 5 Outboard Rigging Guide 2001 Tachometer Digital Multi function Tachometer...
Page 359: ...6C 2 Outboard Rigging Guide 2001 E FEATURES...
Page 376: ...7 15 Outboard Rigging Guide 2001 F15 F25 Remote Control Attach Kit REMOVAL...
Page 406: ...NOTES...
Page 407: ...NOTES...
Page 418: ...Outboards 6X1 DUAL STATION SYSTEM INSTALLATION MANUAL YAMAHA MOTOR CO LTD 6X1 28199 Y2 10A 1...
Page 423: ...10A 6 GENERAL INFORMATION WIRING AND COMPONENT PARTS Single engine system Second station...
Page 424: ...10A 7 Twin engine system Second station...
Page 453: ...WIRING DIAGRAM FIRST STATION Single engine 10A 36...
Page 454: ...SECOND STATION Single engine 10A 37...
Page 455: ...10A 38...
Page 456: ...10A 39...
Page 457: ...Outboards 6X1 DUAL STATION SYSTEM SERVICE GUIDE 10B 1...
Page 460: ...10B 4...
Page 462: ...10B 6 Outboard Rigging Guide 2001 EXTERNAL VIEW OUTLINE OF FEATURES...
Page 495: ...10B 39 Outboard Rigging Guide 2001...
Page 496: ...10B 40 Outboard Rigging Guide 2001...