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Mercury 90 - Service Manual

Mercury 90
574 pages
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MODELS
75 75 MARATHON 75 SEA PRO
90 100 115 125 65/80 JET
United States 0D283222 and Above. . .
Belgium 09793577 and Above. . . . . . . .
With Serial Numbers
SERVICE
MANUAL
Printed in U.S.A.
1997, Mercury Marine
90-830234R3 DECEMBER 1997

Table of Contents

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Questions and Answers

  • D
    Donna JohnsonAug 4, 2025
    Why is the DVA reading low on my Mercury 90?
    • K
      Kevin SmithAug 4, 2025
      If the DVA reading is low, the stator, adapter module, or switch box may be defective. To isolate the problem, refer to the particular engine model procedure.
  • B
    Beverly PowellAug 8, 2025
    What does it mean if the DVA is normal after disconnecting the BLUE adapter lead on my Mercury 90?
    • H
      Haley BartlettAug 8, 2025
      If the DVA reading is normal (190 to 260 volts) after disconnecting the BLUE adapter lead from the switch box and cranking the engine, the switch box is defective.
  • C
    christine96Aug 12, 2025
    What does it mean if the DVA is normal after disconnecting the BLUE/WHITE adapter lead on my Mercury Outboard Motor?
    • N
      Nicholas MunozAug 12, 2025
      If the DVA reading is normal (190 to 260 volts) after disconnecting the BLUE/WHITE adapter lead from the switch box and cranking the engine, the switch box is defective.
  • R
    Richard WrightAug 16, 2025
    What to do if DVA readings are still low after cranking the Mercury Outboard Motor?
    • S
      stephen68Aug 17, 2025
      If DVA readings are still low after cranking the engine, either the stator or the adaptor is defective. Disconnect the GREEN/WHITE and WHITE/GREEN stator leads from the adapter.
  • A
    Angela McfarlandAug 20, 2025
    What to do if the DVA reading is still low after cranking the Mercury 90?
    • E
      Eric MacdonaldAug 21, 2025
      If the DVA reading is still low after cranking the engine, either the stator or the adapter is defective. Disconnect the GREEN/WHITE and WHITE/GREEN stator leads from the adapter.
  • P
    Paul KennedyAug 26, 2025
    What does it mean if resistance between stator leads is normal on a Mercury 90 Outboard Motor?
    • P
      Patricia KelleyAug 26, 2025
      If the resistance between the GREEN/WHITE and WHITE/GREEN stator leads is normal (660 to 710 ohms), the adapter is defective.
  • C
    clawsonAug 29, 2025
    What does it mean if resistance between stator leads is incorrect on a Mercury 90 Outboard Motor?
    • A
      Aaron BassAug 29, 2025
      If the resistance between the GREEN/WHITE and WHITE/GREEN stator leads is incorrect, the stator is defective.

Mercury 90 Specifications

General IconGeneral
BrandMercury
Model90
CategoryOutboard Motor
LanguageEnglish

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