🔎 Yamaha HELM-MASTE Reference Library — Exploded parts diagrams (18 diagrams), specifications, common issues, and maintenance checklist.
Parts Diagrams & OEM Part Numbers
Expand the sections below to view detailed exploded parts diagrams and find the exact OEM replacement components for your Yamaha HELM-MASTE.
▶2ND HELM HARNESS (4 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6X9-8258A-10-00 |
2ND ST HARNESS (P) |
| 2 |
6Y8-85371-01-00 |
END OF LINE RESISTOR |
| 3 |
6X9-8258A-40-00 |
2ND ST HARNESS (S) |
| 4 |
6X9-8258A-60-00 |
2ND ST HARNESS (C) |
▶BATTERY MANAGEMENT SYSTEM (14 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6X9-82716-10-00 |
BMS HARNESS 2 |
| 2 |
6X9-83396-00-00 |
SWITCHING UNIT ASSY |
| 3 |
6X9-82570-A0-00 |
BATTERY SWITCH PANEL |
| 4 |
6X9-82571-20-00 |
PANEL, SWITCH |
| 5 |
6X9-22480-20-00 |
SEAL ASSY |
| 6 |
6X9-82582-00-00 |
CAP 1 (12P) |
| 7 |
6X9-82582-10-00 |
CAP 1 (6P) |
| 8 |
6X9-82582-20-00 |
CAP 1 (6P) |
| 9 |
6X9-82582-30-00 |
CAP 1 (9P) |
| 10 |
6X9-82582-40-00 |
CAP 1 (8P) |
| 11 |
6X9-82582-50-00 |
CAP 1 (8P) |
| 12 |
6X9-82582-60-00 |
CAP 1 (3P) |
| 13 |
6X9-82582-70-00 |
CAP 1 (2P) |
| 14 |
6X9-82582-80-00 |
CAP 1 (6P) |
▶CL5 DISPLAY (8 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6YM-83710-12-00 |
CL5 DISPLAY |
| 2 |
6YM-22480-00-00 |
SEAL ASSY |
| 3 |
6YM-83956-00-00 |
CAP 1 |
| 4 |
6YD-83957-00-00 |
CAP 2 |
| 5 |
6YM-83512-00-00 |
RIM |
| 6 |
6YM-87278-00-00 |
COVER, METER |
| 7 |
6YM-83553-00-00 |
CONVERSION HARNESS |
| 8 |
6YD-8356N-00-00 |
WIRE, LEAD |
▶CONVERSION HARNESS (5 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6X9-83553-60-00 |
CONVERSION HARNESS |
| 2 |
6X9-83553-20-00 |
CONVERSION HARNESS |
| 3 |
6X9-83553-30-00 |
CONVERSION HARNESS |
| 4 |
6X9-83553-40-00 |
CONVERSION HARNESS |
| 5 |
6X9-83553-50-00 |
CONVERSION HARNESS |
▶DEC 1 SINGLE (12 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6X9-48A01-01-00 |
REMOTE CONTROL BOX ASSY 2 |
| 2 |
6X9-4822A-00-00 |
GRIP, LEVER SINGL |
| 3 |
6X9-48127-00-00 |
SCREW 1 |
| 4 |
92990-05300-00 |
WASHER, INTERNAL TOOTH |
| 5 |
6X9-48400-00-00 |
COVER ASSY |
| 6 |
6X9-42697-00-00 |
TUNING FORK MARK |
| 7 |
6X9-4811C-00-00 |
COVER, SINGLE |
| 8 |
6X9-48167-00-00 |
PLUG |
| 9 |
6X9-48176-00-00 |
GROMMET |
| 10 |
98580-05060-00 |
SCREW, PAN HEAD |
| 11 |
704-48287-00-00 |
WASHER |
| 12 |
95380-05600-00 |
NUT |
▶DEC 2 MULTIPLE (14 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6X9-48A02-01-00 |
REMOTE CONTROL BOX ASSY 3 |
| 2 |
6X9-4822B-00-00 |
GRIP, LEVER MULTI |
| 3 |
6X9-48127-00-00 |
SCREW 1 |
| 4 |
92990-05300-00 |
WASHER, INTERNAL TOOTH |
| 5 |
6X9-48222-00-00 |
GRIP, CONTROL LEVER |
| 6 |
6X9-48400-00-00 |
COVER ASSY |
| 7 |
6X9-42697-00-00 |
TUNING FORK MARK |
| 8 |
6X9-48119-00-00 |
COVER |
| 9 |
6X9-48167-00-00 |
PLUG |
| 10 |
6X9-48168-00-00 |
PLUG 2 |
| 11 |
6X9-48176-00-00 |
GROMMET |
| 12 |
98580-05060-00 |
SCREW, PAN HEAD |
| 13 |
704-48287-00-00 |
WASHER |
| 14 |
95380-05600-00 |
NUT |
▶DEC 3 FLUSH SIDE MOUNT (9 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6X9-48A00-00-00 |
REMOTE CONTROL BOX ASSY 1 |
| 2 |
6X9-48166-00-00 |
PLUG |
| 3 |
6X7-82575-01-00 |
ENGINE STOP SWITCH ASSY |
| 4 |
6X9-4823B-00-00 |
PACKING 2 |
| 5 |
97780-06230-00 |
SCREW, TAPPING |
| 6 |
701-48287-00-00 |
WASHER |
| 7 |
6X0-48156-00-00 |
NUT 1 |
| 8 |
6X9-42821-00-00 |
BAND, CLAMP |
| 9 |
6X9-42697-00-00 |
TUNING FORK MARK |
▶DES 1 (9 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6X9-42401-00-00 |
STEERING ACTUATOR |
| 2 |
6X9-42402-00-00 |
REPAIR KIT, 1 |
| 3 |
6X9-42403-00-00 |
REPAIR KIT, 2 |
| 4 |
6X9-42404-00-00 |
REPAIR KIT, 3 |
| 5 |
6X9-42405-00-00 |
REPAIR KIT, 4 |
| 6 |
6X9-42406-00-00 |
REPAIR KIT, 5 |
| 7 |
6X9-438A0-10-00 |
STEERING ACTUATOR HARNESS |
| 8 |
6X9-42407-00-00 |
REPAIR KIT, 6 |
| 9 |
6X9-42408-00-00 |
REPAIR KIT, 7 |
▶DES 2 (14 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6X9-8258A-90-00 |
SCU SPLIT HARNESS |
| 2 |
6GR-81115-10-00 |
SCU LINK HARNESS 30M-10F |
| 3 |
6Y8-85371-01-00 |
END OF LINE RESISTER |
| 4 |
6GR-81115-20-00 |
SCU LINK HARNESS (C) |
| 5 |
6X9-615A0-00-00 |
HELM UNIT ASSY |
| 6 |
6GR-615A0-00-00 |
HELM UNIT ASSY |
| 7 |
6GR-6154A-00-00 |
TILT HELM UNIT |
| 8 |
6X9-8258A-A1-00 |
HELM HARNESS 09M-3FT |
| 9 |
6Y8-85371-01-00 |
END OF LINE RESISTOR |
| 10 |
6X9-8258A-B1-00 |
HELM HARNESS 09M-3FT |
| 11 |
6Y8-85371-01-00 |
END OF LINE RESISTOR |
| 12 |
6X6-8258A-91-00 |
EXTENSION, WIRE HARNESS (15M) |
| 13 |
6GR-8258A-40-00 |
HELM HARNESS 18M-6FT |
| 14 |
6GR-8258A-10-00 |
HELM HARNESS 09M-3FT |
▶IMMOBILIZER KIT (8 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6X9-86260-12-00 |
REMOTE CONTROL UNIT ASSY |
| 2 |
6X9-86261-10-00 |
XMTR COMP |
| 3 |
6X9-86267-00-00 |
CASE COMPLETE 1 |
| 4 |
6X9-81948-00-00 |
BRACKET |
| 5 |
6X9-85546-01-00 |
BAND |
| 6 |
6X9-82509-10-00 |
WIRE, SUB LEAD |
| 7 |
703-83383-11-00 |
BUZZER |
| 8 |
95880-06016-00 |
BOLT, FLANGE |
▶JOYSTICK AND AUTOPILOT (25 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6X9-8591T-32-00 |
BOAT CONTROL UNIT (TRIPLE) |
| 2 |
6X9-88107-00-00 |
GPS UNIT |
| 3 |
6X9-8252H-00-00 |
PLATE, HOLDER |
| 4 |
6X9-8255H-00-00 |
HOLDER, SOCKET |
| 5 |
6X9-8A410-00-00 |
HEADING SENSOR |
| 6 |
6YM-83553-00-00 |
CONVERSION HARNESS |
| 7 |
6X9-8253V-00-00 |
AUTOPILOT PANEL |
| 8 |
6X9-82571-80-00 |
PANEL, SWITCH |
| 9 |
6X9-22480-80-00 |
SEAL ASSY |
| 10 |
6X9-482A0-00-00 |
JOYSTICK ASSY |
| 11 |
6X9-42697-00-00 |
TUNING FORK MARK |
| 12 |
6X9-48156-00-00 |
NUT 1 |
| 13 |
6X9-4823A-00-00 |
PACKING |
| 14 |
6X9-82386-01-00 |
BCU HARNESS (MAIN ST) |
| 15 |
68V-82582-10-00 |
CAP 1 (2P) |
| 16 |
6X9-82582-20-00 |
CAP 1 (6P) |
| 17 |
6X9-82386-10-00 |
BCU HARNESS (2ND ST) |
| 18 |
6X9-82582-20-00 |
CAP 1 (6P) |
| 19 |
6X9-83553-10-00 |
CONVERSION HARNESS |
| 20 |
6ES-83720-01-00 |
LED ASSY (PROP LIGHTS) |
| 21 |
6X9-82586-40-00 |
PROP LIGHT EXTN HARNESS 40FT |
| 22 |
6X9-82386-20-00 |
BCU HARNESS (QUINT/MAIN ST) |
| 23 |
6YG-8A2D0-10-00 |
GATEWAY |
| 24 |
6YG-82521-00-00 |
GATEWAY HARNESS |
| 25 |
6X9-82586-00-00 |
EKS HARNESS EXTENSION 46M-15F |
▶MFD INTERFACE (14 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6YM-8A2D0-10-00 |
MFD INTERFACE |
| 2 |
6YM-83956-00-00 |
CAP 1 |
| 3 |
6YD-83957-00-00 |
CAP 2 |
| 4 |
6YM-8A2D0-02-00 |
MFD INTERFACE |
| 5 |
6YM-83956-00-00 |
CAP 1 |
| 6 |
6YD-83957-00-00 |
CAP 2 |
| 7 |
6YM-86261-00-00 |
XMTR COMP |
| 8 |
6YM-82129-00-00 |
COVER, BATTERY |
| 9 |
6YM-8432M-00-00 |
KNOB ASSY |
| 10 |
6YM-60BJ0-00-00 |
CRADLE ASSY |
| 11 |
6YM-83553-10-00 |
CONVERSION HARNESS |
| 12 |
6YM-8356N-00-00 |
FUEL TANK WIRE |
| 13 |
6YM-8533A-00-00 |
HDMI CABLE |
| 14 |
6YG-8A2D0-11-00 |
GATEWAY |
▶SWITCH PANEL 1 EKS, SINGLE (17 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6X9-82570-00-00 |
PANEL SWITCH ASSY |
| 2 |
6X9-82571-00-00 |
PANEL, SWITCH |
| 3 |
6X9-22480-00-00 |
SEAL ASSY |
| 4 |
6X9-82570-B0-00 |
PANEL SWITCH ASSY |
| 5 |
6X9-82571-20-00 |
PANEL, SWITCH |
| 6 |
6X9-22480-20-00 |
SEAL ASSY |
| 7 |
6X9-82570-70-00 |
PANEL SWITCH ASSY |
| 8 |
6X9-82571-70-00 |
PANEL, SWITCH |
| 9 |
6X9-22480-70-00 |
SEAL ASSY |
| 10 |
682-82556-00-00 |
LANYARD, STOP SWITCH |
| 11 |
6X9-82716-21-00 |
EKS HARNESS |
| 12 |
703-83383-11-00 |
BUZZER |
| 13 |
90465-13M39-00 |
CLAMP |
| 14 |
6X9-81950-00-00 |
RELAY ASSY |
| 15 |
6X9-82716-60-00 |
EKS HARNESS |
| 16 |
703-83383-11-00 |
BUZZER |
| 17 |
90465-13M39-00 |
CLAMP |
▶SWITCH PANEL 2 EKS, TWIN (22 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6X9-82570-10-00 |
PANEL SWITCH ASSY |
| 2 |
6X9-82571-10-00 |
PANEL, SWITCH |
| 3 |
6X9-22480-10-00 |
SEAL ASSY |
| 4 |
6X9-82570-B0-00 |
PANEL SWITCH ASSY |
| 5 |
6X9-82571-20-00 |
PANEL, SWITCH |
| 6 |
6X9-22480-20-00 |
SEAL ASSY |
| 7 |
6X9-82570-30-00 |
PANEL SWITCH ASSY |
| 8 |
6X9-82571-30-00 |
PANEL, SWITCH |
| 9 |
6X9-22480-30-00 |
SEAL ASSY |
| 10 |
6X9-82570-80-00 |
PANEL SWITCH ASSY |
| 11 |
6X9-82571-70-00 |
PANEL, SWITCH |
| 12 |
6X9-22480-70-00 |
SEAL ASSY |
| 13 |
682-82556-00-00 |
LANYARD, STOP SWITCH |
| 14 |
6X9-82716-31-00 |
EKS HARNESS |
| 15 |
703-83383-11-00 |
BUZZER |
| 16 |
90465-13M39-00 |
CLAMP |
| 17 |
6X9-81950-00-00 |
RELAY ASSY |
| 18 |
6X6-81980-00-00 |
DIODE ASSY |
| 19 |
6X9-82716-71-00 |
EKS HARNESS |
| 20 |
703-83383-11-00 |
BUZZER |
| 21 |
90465-13M39-00 |
CLAMP |
| 22 |
6X6-81980-10-00 |
DIODE ASSY |
▶SWITCH PANEL 3 EKS, TRIPLE (23 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6X9-82570-00-00 |
PANEL SWITCH ASSY |
| 2 |
6X9-82571-00-00 |
PANEL, SWITCH |
| 3 |
6X9-22480-00-00 |
SEAL ASSY |
| 4 |
6X9-82570-40-00 |
PANEL SWITCH ASSY |
| 5 |
6X9-82571-40-00 |
PANEL, SWITCH |
| 6 |
6X9-22480-40-00 |
SEAL ASSY |
| 7 |
6X9-82570-C0-00 |
PANEL SWITCH ASSY |
| 8 |
6X9-82571-70-00 |
PANEL, SWITCH |
| 9 |
6X9-22480-70-00 |
SEAL ASSY |
| 10 |
682-82556-00-00 |
LANYARD, STOP SWITCH |
| 11 |
6X9-82570-B0-00 |
PANEL SWITCH ASSY |
| 12 |
6X9-82571-20-00 |
PANEL, SWITCH |
| 13 |
6X9-22480-20-00 |
SEAL ASSY |
| 14 |
6X9-82716-41-00 |
EKS HARNESS |
| 15 |
703-83383-11-00 |
BUZZER |
| 16 |
90465-13M39-00 |
CLAMP |
| 17 |
6X6-81980-10-00 |
DIODE ASSY |
| 18 |
6X6-81980-00-00 |
DIODE ASSY |
| 19 |
6X9-81950-00-00 |
RELAY ASSY |
| 20 |
6X9-82716-80-00 |
EKS HARNESS |
| 21 |
703-83383-11-00 |
BUZZER |
| 22 |
90465-13M39-00 |
CLAMP |
| 23 |
6X6-81980-10-00 |
DIODE ASSY |
▶SWITCH PANEL 4 EKS, QUAD (23 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6X9-82570-00-00 |
PANEL SWITCH ASSY |
| 2 |
6X9-82571-00-00 |
PANEL, SWITCH |
| 3 |
6X9-22480-00-00 |
SEAL ASSY |
| 4 |
6X9-82570-50-00 |
PANEL SWITCH ASSY |
| 5 |
6X9-82571-50-00 |
PANEL, SWITCH |
| 6 |
6X9-22480-50-00 |
SEAL ASSY |
| 7 |
6X9-82570-D0-00 |
PANEL SWITCH ASSY |
| 8 |
6X9-82571-70-00 |
PANEL, SWITCH |
| 9 |
6X9-22480-70-00 |
SEAL ASSY |
| 10 |
682-82556-00-00 |
LANYARD, STOP SWITCH |
| 11 |
6X9-82570-B0-00 |
PANEL SWITCH ASSY |
| 12 |
6X9-82571-20-00 |
PANEL, SWITCH |
| 13 |
6X9-22480-20-00 |
SEAL ASSY |
| 14 |
6X9-82716-91-00 |
EKS HARNESS |
| 15 |
703-83383-11-00 |
BUZZER |
| 16 |
90465-13M39-00 |
CLAMP |
| 17 |
6X6-81980-40-00 |
DIODE ASSY |
| 18 |
6X6-81980-00-00 |
DIODE ASSY |
| 19 |
6X9-81950-00-00 |
RELAY ASSY |
| 20 |
6X9-82716-A0-00 |
EKS HARNESS |
| 21 |
703-83383-11-00 |
BUZZER |
| 22 |
90465-13M39-00 |
CLAMP |
| 23 |
6X6-81980-40-00 |
DIODE ASSY |
▶SWITCH PANEL 5 EKS, QUINT (23 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6X9-82570-00-00 |
PANEL SWITCH ASSY |
| 2 |
6X9-82571-00-00 |
PANEL, SWITCH |
| 3 |
6X9-22480-00-00 |
SEAL ASSY |
| 4 |
6X9-82570-60-00 |
PANEL SWITCH ASSY |
| 5 |
6X9-82571-60-00 |
PANEL, SWITCH |
| 6 |
6X9-22480-60-00 |
SEAL ASSY |
| 7 |
6X9-82570-D0-00 |
PANEL SWITCH ASSY |
| 8 |
6X9-82571-70-00 |
PANEL, SWITCH |
| 9 |
6X9-22480-70-00 |
SEAL ASSY |
| 10 |
682-82556-00-00 |
LANYARD, STOP SWITCH |
| 11 |
6X9-82570-B0-00 |
PANEL SWITCH ASSY |
| 12 |
6X9-82571-20-00 |
PANEL, SWITCH |
| 13 |
6X9-22480-20-00 |
SEAL ASSY |
| 14 |
6X9-82716-B0-00 |
EKS HARNESS |
| 15 |
703-83383-11-00 |
BUZZER |
| 16 |
90465-13M39-00 |
CLAMP |
| 17 |
6X6-81980-10-00 |
DIODE ASSY |
| 18 |
6X6-81980-00-00 |
DIODE ASSY |
| 19 |
6X9-81950-00-00 |
RELAY ASSY |
| 20 |
6X9-82716-C0-00 |
EKS HARNESS |
| 21 |
703-83383-11-00 |
BUZZER |
| 22 |
90465-13M39-00 |
CLAMP |
| 23 |
6X6-81980-10-00 |
DIODE ASSY |
▶SWITCH PANEL 7 (3 parts)
| Ref |
OEM Part # |
Part Name |
| 1 |
6X9-82570-A0-00 |
BATTERY SWITCH PANEL |
| 2 |
6X9-82571-20-00 |
PANEL, SWITCH |
| 3 |
6X9-22480-20-00 |
SEAL ASSY |
