Sears Motor Information

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  • bill-m

    US Member - 1 Year
    Replies: 56
    Topics: 30
    #205994

    Hi all, I just received the 1964 Sears 3.5 hp motor I bought a couple months ago. It is made by McCulloch. The motor is complete except for the Pin that adjusts the angle of the motor. I have taken the gas tank off so I can remove the rust inside. I am getting ready to pull the flywheel so I can inspect the ignition parts. So far at this point I have no guide to help me. I am in need of an owner’s manual, parts list and possibly a service manual. If anyone has any or all of these and could post them or email them to me at wdm@trcable.tv it would be greatly appreciated. The serial number is 64600310-3192 and the model number is 574-60030. I don’t feel very comfortable proceeding any further without at least some of the printed materials. As stated before any help would be greatly appreciated. Thanks, Bill M


    Buccaneer

    US Member - 1 Year
    Replies: 5815
    Topics: 896
    #206004

    This is about all I found, not sure of the year though, but probably very similar to yours.

    Sears-3.5-ignition

    Sears-3.5-carb-adj.

    Prepare to be boarded!


    bill-m

    US Member - 1 Year
    Replies: 56
    Topics: 30
    #206129

    Thanks for the reply buccaneer. The diagrams you posted will be a great help and a good start. I did get the flywheel off and there is some surface rust on the inside of the flywheel and stator. What would be a good way to remove the rust? I wouldn’t want to damage these parts by using anything too harsh.


    seakaye12

    US Member - 2 Years
    Replies: 820
    Topics: 101
    #206131

    A little rust is normal and won’t affect the magneto’s function. If you want you can clean it up a little with a wire brush and/or a bit of medium grit sandpaper. Just don’t get the grit and debris near the points. Clean the points up with 400-600 grit wet/dry sandpaper ….give them a squirt with brake cleaner and then run a piece of paper (like a grocery bag or business card) through them for the final clean. Put the flywheel back on and test spark. You will probably be fine.

    I do see that discount marine parts offers a carb-kit for your engine….so if after having a look at it you can opt for that if you see the need. Often just a cleaning and inspection is all that is needed; try and save the gaskets as you take it apart. The kits are $$$$$

    https://www.dicarbparts.com/custom-carburetor-kits/718-walbro-lmg159-carburetor-mcculloch-35hp-64300310-outboard-carb-kit-di-25075.html

    Maybe others here will advise you re: the lower unit grease or oil. Check that before running.

    Good luck!


    seakaye12

    US Member - 2 Years
    Replies: 820
    Topics: 101
    #206132

    Interesting chat about your carburetor here:

    Walbro Carb Float Spring


    seakaye12

    US Member - 2 Years
    Replies: 820
    Topics: 101
    #206135

    Walbro_1

    Walbro_2

    Walbro_3

    Walbro_4

    Walbro_1

    • This reply was modified 2 years ago by seakaye12.
    • This reply was modified 2 years ago by seakaye12.
    • This reply was modified 2 years ago by seakaye12.

    bill-m

    US Member - 1 Year
    Replies: 56
    Topics: 30
    #206184

    Thanks again for the information on rust removal and a special thanks to Seakaye 12 for the carb pictures. They will be very helpful! When I first heard of this motor I posted pictures and received comments that this type won a “slow trolling” contest. I can’t wait to get this motor on the lake and see how slow I can go.

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