1959 fisherman 5.5 help

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This topic contains 67 replies, has 13 voices, and was last updated by Avatar crosbyman 2 days, 18 hours ago.

Viewing 15 posts - 46 through 60 (of 68 total)
  • Mumbles
    Mumbles
    Canada Member - 2 Years
    Replies: 4037
    Topics: 416
    #175660

    Your spark returns to the mag plate thru the top of the brass retainer ring which is also a support bearing for the plate and also thru the center bearing which the plate rotates on. These areas must be free of any corrosion or buildup of any kind which can impede the electrical flow. Lightly sanding the inside of the plates bearing surface and other contact surfaces will help to ensure a good electron flow. Don’t bend or deform the brass plate.

    To determine if the plate is too loose, try wiggling one edge of it up and down while holding the opposite edge still. A good fitting plate will hardly move at all while a loose one will flop around quite noticeably.

    If it isn’t poor grounding causing the spark issue, I’d then suspect internal breaks or shorts in the plug wires or poor connections on the ends of them.

    • This reply was modified 3 weeks, 6 days ago by Mumbles Mumbles.
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    fleetwin
    US Member - 2 Years
    Replies: 2614
    Topics: 31
    #175681

    I thought he had already tried grounding the mag plate, perhaps I misread the post….Nonetheless, your theory of a loose/misrouted plug lead makes sense….

    Avatar
    crosbyman
    Canada Member - 1 Year
    Replies: 1189
    Topics: 158
    #175714

    if it was me….

    I would really clean up the whole oily looking mess of an engine……… certainly any part carrying electrical currents ..as suggested redo all connections from coil up to the boots clips… if need be install new boots with metallic wire crimped & folded back under the clips as suggested by mumbles

    shine up.. polish all contact points and/or surfaces (retainer ring…… mag support plate coil grounds ( scrape all connection points and use star.. lock washers to bite into mating surfaces ) reinspect the mag plate plug wire routing

    swap that lower coil/condenser/point kit to the top cyl position …we know it is good and never causes a problem

    remeasure the coil secondaries for 4-7kohms from the boots to frame…. wiggle everything while measuring … see if it cuts out

    reassemble the whole thing dry … no greases ..oil as a test … and keep that mag plate grounded as insurance

    realign the coil edges on the mag plate

    find a way to run that engine in the dark…3 a.m. if need be ………… look for arcing anywhere at high rpm when it fails

    if all else fails make a nice trolling motor out of it !

    ..patience brings joy

    • This reply was modified 3 weeks, 5 days ago by Avatar crosbyman.
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    cookjer24

    Replies: 52
    Topics: 7
    #176572

    ok i got back on the motor…so i took it all apart cleaned up all the oil there was a bit packed up under the mag plate hold down the big one…put back together and now it run even worse than it did now the bottom has no spark at idle…but i took it apart again getting really good at it only takes me 5 min to tear aprt lol…and in pic you can see the bushing does have a small gap could this be my whole problem..i’m thinking of puting some really small thin pieces of copper in between it to make it a lil tighter do you think it will work or ruin it more…other than the litlle gap ii’m loss of words why it wont work and just about ready to throw it out…

    Avatar
    cookjer24

    Replies: 52
    Topics: 7
    #176573

    pic of the mag plate hold down around the bushing..i pushed the hold down to the left to make it flush on the right to show the lil bit of gap in the bushing.

    • This reply was modified 2 weeks ago by Mumbles Mumbles.
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    cookjer24

    Replies: 52
    Topics: 7
    #176582

    so i put it back together and got spark on the bottom cylinder like i always did…still nothing on the top it is dead now but if i hook up a ground wire to spark plug end it lights up my tester but plug still doesnt have spark.odd any thing else i should look at..think i’m going to return the coil for a new one say it is fualty since now the screw terminal where the plug wire goes in came out of the coil..just can’t win

    frankr
    frankr
    US Member - 1 Year
    Replies: 4154
    Topics: 43
    #176585

    That gap in your picture means nothing at all. The mag plate centers on the crankcase neck, not on the mounting ring.

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    cookjer24

    Replies: 52
    Topics: 7
    #176600

    ok good to know…so i should have a good ground then if the bottom cylinder has spark…i’m going to buy some new plugs try that…and going to see if local parts store has diff spark plug ends the ones that you bend wire around wire and clamp on insteae of the old spring looking ones that you just push into wire..i cant figure out why my tester lights up if you ground it out but plug will not spark unless it is bad for some reason….can i just glue the little screw terminal back into coil where the plug wire goes or is the new coil junk.

    Avatar
    cookjer24

    Replies: 52
    Topics: 7
    #176607

    so i put old coil back in..put the clamp on style plug end on new wire and same thing…i get good spark in certain throttle positions then i get weak spark where the spark tester will light up but the plug wont then i get no spark at all…been through everything now and nothing seems to help..hoping some one with the same problem comes along and see this post becouse i checked everything and nothing seems to help

    phil
    phil
    US Member - 2 Years
    Replies: 80
    Topics: 12
    #176613

    What kind of spark tester are you using??

    I use one like this:
    https://www.napaonline.com/en/p/BK_7002015

    And open it to a quarter inch (compensating for the fact that it’s harder to make a spark under compression) and I’m not satisfied unless I get a blue spark and a good “snap” sound.

    After sanding the points, I always clean them by running clean paper dipped in acetone thru them.

    http://www.omc-boats.org
    http://www.aerocraft-boats.org

    • This reply was modified 1 week, 6 days ago by phil phil.
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    cookjer24

    Replies: 52
    Topics: 7
    #176627

    i have a inline spark checker that lights up if there is spark…i sanded and cleaned points a few times now..there is plenty of meat left on them too almost look new very little wear…and i switched everything to the bottom cy;inder that works and i get spark except for the points…i dont think it is a ground issue becuose the bottom cylinder works fine.

    Avatar
    cookjer24

    Replies: 52
    Topics: 7
    #176628

    i might hook a drill to flywheel to spin it over at night see if i see any arcing going on.

    olcah
    olcah
    US Member - 1 Year
    Replies: 318
    Topics: 68
    #176687

    Since you swapped coils, condensers, and points without much change I would suspect the spark plug wire to plug terminal connection. The stab-in terminal at the plug end may not have a good connection with the wire copper core. Some folks strip 3/16 or so of insulation from the core and fur the copper strands to increase the chance the end may contact the terminal. Also stab in again and confirm by feel that you are indeed through the copper core.

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    cookjer24

    Replies: 52
    Topics: 7
    #176749

    there is brand new wire just put on and just switched terminal end to the clamp on style…dont get it if bottom cylinder has spark then there is good ground…only thing i didnt change is the points i might order a set and see also have another new coil coming but dont think that is the problem.

    Avatar
    cookjer24

    Replies: 52
    Topics: 7
    #176750

    can any one tell me if OMC 172522 the part number for tune up kit for 5.5 fisherman 1959

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