Mercury KG7 parts

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  • destroyer85golf


    Replies: 25
    Topics: 5
    #11290

    This weekend I was cruising the Facebook for sale boat motors. Because as I stated before, my wife thinks it’s junk… and I like sleeping on the couch.. anyway I saw a merc for sale so I decided to pop the picture up, and at the bottom it looked like a pointy lower unit. So I sent the pic over to my dad, and we made plans to go pick it up. Cause my mom doesn’t share our enthusiasm , I figured I might as well get him in trouble too. So we get to the guys house, and there is a KG7 on a q tower! Score, I don’t think dad could throw the 100 bucks at the guy fast enough . Even had the bottom cowl with it. The motor has good compression, and everything looks great other than no spark. Which leads me to the question, does anyone know where to get coils, points and condensers for it? This winter my dad, my brother and myself will be building a hydroplane to put this thing on. He’s 15 and super excited to get into the hobby.


    Attachments:


    mercuryman

    US Member - 1 Year
    Replies: 456
    Topics: 163
    #83290

    You can’t get those parts anymore I will give you your money back for the motor.


    destroyer85golf


    Replies: 25
    Topics: 5
    #83291
    quote mercuryman:

    You can’t get those parts anymore I will give you your money back for the motor.

    Hahaha you are the third guy to say that!!


    mercuryman

    US Member - 1 Year
    Replies: 456
    Topics: 163
    #83292

    The points haven’t been available for a long time and just last year new coils and no longer available. There are some military surplus coils for sale on Ebay by Big Rich they will fit the mercury Bendix magneto. The high tension connection is different and you must rig up a connection. Unless the points are broken they can be cleaned up. I like to use 400 wet or dry paper and make them shine the wipe with dry stiff paper. If you have a ohm meter they should read 1 ohm or less. You may not need coils pull the flywheel and check them out.


    mercuryman

    US Member - 1 Year
    Replies: 456
    Topics: 163
    #83293

    Getting a old Mercury to run isn’t always easy. You can have 120 psi compression, great spark and a good carburetor and a mercury still may not start. A mercury has ball and roller bearing on the crankshaft and it needs a good oil seal on each end of the crank to hold crank case pressure. Over time these seals get hard and won’t seal. The seals are available but a little difficult to change.


    destroyer85golf


    Replies: 25
    Topics: 5
    #83300

    I appreciate the tips, dad pulled the flywheel, the coils are cracked. He didn’t get much further than that. Someone had already been in there, as I guess is to be expected with a motor of that age. They “ bubba’d a few wires. But the coils will definitely need replaced.


    mercuryman

    US Member - 1 Year
    Replies: 456
    Topics: 163
    #83302

    Well the coils on Ebay are $14.99 plus shipping if you need help wiring them let me know.


    rpenn


    Replies: 5
    Topics: 0
    #83865

    Hi Mercuryman,

    I got two new coils on Ebay. They have two circular solder points in the center on the side of the coil. I assume these are for the secondary and should be connected to the spark plug wire? Is this correct? Do you have instructions, diagram or pix you could send?

    Roger


    seakaye12

    US Member - 2 Years
    Replies: 711
    Topics: 99
    #83867
    quote mercuryman:

    Well the coils on Ebay are $14.99 plus shipping if you need help wiring them let me know.

    I recently bought a couple of those $15.00 coils. I think I saw a post from you on the other board and decided to pick up a couple. Any tips you have on how to adapt the wiring….let me know. Looks "somewhat easy" but if you have already done it….I would appreciate the advice.

    Chuck


    seakaye12

    US Member - 2 Years
    Replies: 711
    Topics: 99
    #83870

    The Boat House


    Replies: 3617
    Topics: 91
    #83875

    You're only as smart as the person you're talking to.

    • This reply was modified 3 years ago by The Boat House.
    • This reply was modified 9 months, 2 weeks ago by The Boat House.

    chinewalker

    US Member - 2 Years
    Replies: 459
    Topics: 15
    #83877

    Do these help? I cut the insulation back a ways to allow the wire to slip under the coil without hitting the stator plate. I then slid the entire coil inside a stub of bicycle inner tube material to insulate it. Coil throws a good spark!


    Attachments:


    jeff-register


    Replies: 1281
    Topics: 49
    #83886

    Not nearly as hard as a KF5, bottom seal aim the seal lips DOWN & replace the top too. Ground one of the hi volt lugs for super fire,

    1 user thanked author for this post.

    seakaye12

    US Member - 2 Years
    Replies: 711
    Topics: 99
    #84275
    quote Chinewalker:

    Do these help? I cut the insulation back a ways to allow the wire to slip under the coil without hitting the stator plate. I then slid the entire coil inside a stub of bicycle inner tube material to insulate it. Coil throws a good spark!

    I’m surprised that the inner-tube rubber is adequate to prevent arcing to the mag-plate. Interesting job.


    Francis Cyr

    US Member - 1 Year
    Replies: 1
    Topics: 1
    #230960

    So I’m curious. The thread seemed to end. Did the MFR-61689 coils actually work after the motor was reassembled?

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