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  1. J

    Engine bogs to steady idle after 20 minutes.

    After mowing for 20 min, my zd18 will bog itself down to an idle. If I let it sit for 30 min I'll get another 20 out of it. I replaced fuel filters, air filter, all new oil and hydrolic fluids (including gear box), new battery, removed and cleaned tank, replaced fuses, radiator screen is clear...