Common problems with the 6V Evinrude Starters?

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  • mr-asa

    US Member - 2 Years
    Replies: 794
    Topics: 138
    #242941

    Got a starter, Autolite MAK 4033M 5K on the tag from what I can tell.
    With it installed on the ’55 25HP it came with I hooked it up to a portable setup I’ve cobbled together that is basically a momentary switch, 12V starter solenoid, and a 12V car battery. Everything is setup correctly (basically I cut out everything but the momentary switch and solenoid from the below) and the starter is getting power but there’s no action.

    Brushes? Do the windings like to burn out? Other?


    Buccaneer

    US Member - 1 Year
    Replies: 4998
    Topics: 820
    #242954

    Did you clean the commutator? Inspect the brushes?
    Lacking a “growler” to check for shorts in the windings, you
    can make sure there’s no “open” windings by checking
    continuity throughout the commutator with an ohm meter,
    holding one meter lead on one segment, and go around the
    commutator with the other lead.

    Prepare to be boarded!


    The Boat House


    Replies: 3514
    Topics: 88
    #242968


    Try tapping on the starter. If it cranks its likely just
    poor contact of the brushes. This friend of mine
    has been beating on his starter with a rock to
    get this to crank over. Once he gets it started the
    first time its fine the rest of the day. I know but
    its his motor.
    Tubs

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


    mr-asa

    US Member - 2 Years
    Replies: 794
    Topics: 138
    #242969

    Did you clean the commutator? Inspect the brushes?
    Lacking a “growler” to check for shorts in the windings, you
    can make sure there’s no “open” windings by checking
    continuity throughout the commutator with an ohm meter,
    holding one meter lead on one segment, and go around the
    commutator with the other lead.

    I haven’t checked any of those. Made sure it spun and then hooked it up. Figured I’d look for the most common issues these might have before I start digging in.


    Mumbles

    Canada Member - 2 Years
    Replies: 5121
    Topics: 274
    #242974

    Your six volt starter has a band on the bottom which can be removed to inspect the brushes and commutator. The brushes may be worn or hung up. Another issue with these starters is the thrust washer on the bottom of the armature wears out, allowing the commutator to fall a bit and short out on the end plate. I’ve fixed this problem before by making thin washers out of Delrin.The field windings are quite robust but if the insulation has fallen off, they can be rewrapped with cotton and then varnished. I use seam binding meant for sewing to do this.

    Try holding the starter upside down and put the power to it. If it spins and tries to jump out of your hand, you can assume the lower thrust washer is worn out and it has an internal short.

    Starter-Field-Coils-2

    Starter-Field-Coils

    • This reply was modified 2 months ago by Mumbles.
    • This reply was modified 2 months ago by Mumbles.
    1 user thanked author for this post.

    mr-asa

    US Member - 2 Years
    Replies: 794
    Topics: 138
    #243083

    Well… crap.
    At least I know what is wrong with this starter


    Buccaneer

    US Member - 1 Year
    Replies: 4998
    Topics: 820
    #243084

    Wow, did it use to live on the bottom of the ocean?

    Prepare to be boarded!


    mr-asa

    US Member - 2 Years
    Replies: 794
    Topics: 138
    #243085

    It actually looked pretty dadgum good when I got it. Picked it up for $100 a few years back, came with controls, cables, wiring, fuel tank and fuel lines. Guy basically pulled it off his boat when he upgraded.
    No real evidence of any water damage. The outboard spun over with no issues. Paint was horrible, but I’ve fixed that by now

    • This reply was modified 2 months ago by mr-asa.
    • This reply was modified 2 months ago by mr-asa.

    bobw

    US Member - 1 Year
    Replies: 1497
    Topics: 46
    #243089

    This guy can rebuild your starter pretty cheap, but the shipping costs might be a little steep.

    Bob

    1954 Johnson CD-11
    1956 Johnson RD-18
    1958 Johnson QD-19
    1959 Johnson QD-20
    1957 Evinrude Fastwin 18

    "Every 20 minute job is only a broken bolt away from a 3-day project."


    mr-asa

    US Member - 2 Years
    Replies: 794
    Topics: 138
    #243093

    Thanks Bob, there’s an actual little Mom ‘n Pop style rewinding shop about 4 miles away from me that somehow is still open. I’m going to try and clear as much of the rust out of this thing as possible and head up there come Monday.


    mr-asa

    US Member - 2 Years
    Replies: 794
    Topics: 138
    #243245

    Hey Mumbles, it looks like the thrust washer on this may be shot. In case the shop I’m heading to doesn’t have a washer, how thick should the delrin be for the washer?


    Mumbles

    Canada Member - 2 Years
    Replies: 5121
    Topics: 274
    #243290

    Hey Mumbles, it looks like the thrust washer on this may be shot. In case the shop I’m heading to doesn’t have a washer, how thick should the delrin be for the washer?

    I can’t remember what I made them but if you put your starter back together and measure the end play, that will give you an idea of where to start. Without a diagram handy, I’m sure there’s a thin washer on top of the armature to. You gotta have some end play.


    mr-asa

    US Member - 2 Years
    Replies: 794
    Topics: 138
    #243660

    EvapoRust and an ultrasonic cleaner, scraped a lot of rust off, sanded commutator, machined a quick 1/32nd delrin bushing/washer and:

    • This reply was modified 1 month, 3 weeks ago by mr-asa.

    Buccaneer

    US Member - 1 Year
    Replies: 4998
    Topics: 820
    #243671

    It’ Alive!

    Prepare to be boarded!


    bobw

    US Member - 1 Year
    Replies: 1497
    Topics: 46
    #243673

    Nice recovery!!

    Bob

    1954 Johnson CD-11
    1956 Johnson RD-18
    1958 Johnson QD-19
    1959 Johnson QD-20
    1957 Evinrude Fastwin 18

    "Every 20 minute job is only a broken bolt away from a 3-day project."

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