Kohler CV20S Starting Issue

Discussion in 'Mechanic and Repair' started by turfmann, Aug 9, 2010.

  1. turfmann

    turfmann LawnSite Platinum Member
    from PRM
    Messages: 4,536

    This one has me stumped.

    This is a Kohler CV20S on a C&S Turf Tracker. It had been out of service for a while before I got it going last week.

    When you engage the starter, it makes a humming noise not unlike an arc welder. The engine will turn over very slowly, almost stopping when it gets to the compression stroke.

    I had the engine running (started on starting fluid) on Friday. It runs perfectly, drives perfectly. Ran up and down the street for half an hour. There is slack in the drive belt for the hydraulics, so that's not it either.

    I swapped out the starter for a spare - no difference.

    I disassembled the battery connections, removed rust, etc. - no difference.

    I disassembled the other ends of the battery cables, removed any corrosion - no difference.

    I disassembled the two rear engine mounts, removed rust down to bare metal - no change.

    I have 11 volts at the battery, 11 volts at the starter. I have continuity on the ground cable.

    I hooked it up to the battery charger, set for 12 volts & 50 amps. No improvement.

    What am I missing here?
  2. BigFish

    BigFish LawnSite Platinum Member
    Messages: 4,190

    A bad solenoid. Also make sure the ground cable goes directly to the block.
  3. turfmann

    turfmann LawnSite Platinum Member
    from PRM
    Messages: 4,536

    The solenoid is part of the starter with this engine, right?

    The ground does not go directly to the block currently - I'll change that and see if it helps.


    FIXDISS LawnSite Senior Member
    Messages: 445

    Put volt meter leads to the positive wire on starter and ground.Turn the key to start a read voltage . If volts drop below 10 replace battery.

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