- Your online store for all types of marine engines and boat parts.
Monday - Friday
9:00 AM - 5:00 PM EST
Click for TOLL-FREE Number
Secure Online Payments
Special $9.95 Flat Rate Shipping
(800) 209-9624 | Home | Contact | Shipping | Returns | Cart View your shopping cart.
Search by Part Number
Enter engine/drive part number.
Original & matching parts for sale.
Manuals & Accessories
Shop by description, item number
or manufacturer's model number.
Why shop with us? Check our reviews! Why Us & Reviews   Boat Repair Forum Boat Repair Forum   Boat Video Gallery Video Gallery
Get instant online access to repair manuals for your Mercury / Mariner outboard. Online Manuals
Order printed Mercury / Mariner service manuals — shipped to your door! Printed Manuals
Use engine diagrams to find & order parts for your Mercury / Mariner engine. Engine Diagrams
Find parts quickly with Mercury application guides. Quick Parts Guide
Results 1 to 7 of 7
  1. #1

    Default "I have a 1989 Mercury 40hp &#

    "I have a 1989 Mercury 40hp (4 cyl) outboard that will not start. It does not seem to spark. It ran last fall, this spring it will not run. The only change is a new starting battery.

    If I pull a plug and look for spark against the block there is nothing (on all 4 plugs). All 4 plugs have good spark if I test them on the push mower.

    The coils seem ok. (short between +/- terminals and between coil tower and either +/- it is open).

    The trigger values are 800 ohms between brown and white/black trigger leads as well 800 ohms between White and Violet trigger leads

    The stator readings worry me. I have open between Blue and Blue/white and 135ohms between red and red/white. What are the correct readings for the stator? Also is it possible for the stator to just stop working over winter?

    Once again, the only change from last fall when it work and this spring is a new starting battery."

  2. #2
    Join Date
    Nov 2005
    , il,

    Default kill switch on controle box?

    kill switch on controle box?
    disconect black/yellow wire on powerpack and look for spark

  3. #3

    Default I manually tested both the dea

    I manually tested both the dead man switch and the mercury tilt switch and they seem ok. I will pull the wire from the switchbox and retest when I get home. I'll post the results.

  4. #4

    Default Removed BK/YL wire from switch

    Removed BK/YL wire from switchbox and still no spark. Also remove YL/YL wires from rectifier and no spark as well.

    Stator readings: BL and BL/WH - open
    RD and RD/WH - 135ohms
    YL and YL - 1.2ohms

    I believe the BL and BL/WH should be between 5k and 7k ohms so I think my stator is done. What would cause the stator to blow.

  5. #5
    Join Date
    Nov 2005
    , il,

    Default "sorry i dont have the values

    "sorry i dont have the values for the stator test but I think you're on the right path, pop the flywheel and take a look. corrosion, old age, mice could be anything"

  6. #6
    Join Date
    May 2006
    Interlachen, Fl, Putnam

    Default "Unplug the main wiring harnes

    "Unplug the main wiring harness at the engine,
    trip the starter solenoid and check for spark,
    this will isolate the engine from the control
    box/ignition switch."

  7. #7

    Default Turns out the stator and the s

    Turns out the stator and the switchbox were blown. One probably took out the other. She purrs like a kitten now.

    Thanks for all the help.

Similar Threads

  1. 1989 8 hp Mercury No spark
    By Max3045 in forum Mercury Mariner Outboard Forum
    Replies: 2
    Last Post: 06-11-2011, 05:40 AM
  2. 2002 Mercury Outboard 40hp efi alarm
    By mikelw in forum Mercury Mariner Outboard Archive
    Replies: 1
    Last Post: 06-22-2009, 04:27 AM
  3. 1975 Mercury 40hp outboard 402
    By jeffhead in forum Mercury Mariner Outboard Archive
    Replies: 2
    Last Post: 06-30-2008, 11:45 AM
  4. 1989 60hp mercury no spark
    By david frost in forum Mercury Mariner Outboard Archive
    Replies: 5
    Last Post: 07-18-2007, 08:25 PM
  5. Does my 1989 40HP Mercury get too much oil Adjustable
    By Beau Johnston in forum Outboard motors archive 2000-2004
    Replies: 5
    Last Post: 08-14-2002, 04:03 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts