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Hot!Toro with ch725 Kohler engine

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CROSSBOLT
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2019/04/04 15:01:26 (permalink)
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Toro with ch725 Kohler engine

Oil filter has a smaller than 3/4-16 thread. All interchanges AND Kohler specs say 3/4-16! This could be 1/2" or metric. Can anyone tell me what the thread actually is and I will get/make an adapter?
 PS: I have reviewed Kohler posts....
Karl
post edited by CROSSBOLT - 2019/04/04 15:02:57

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    AVB
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    Re: Toro with ch725 Kohler engine 2019/04/04 15:35:36 (permalink)
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    Can you verify the engine model and spec number? I don't find a CH725 listed of any spec.
    post edited by AVB - 2019/04/04 15:38:52
    CROSSBOLT
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    Re: Toro with ch725 Kohler engine 2019/04/04 15:43:46 (permalink)
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    KT725! My error! KT725, 22 hp, Toro 42" zero turn. KT725....
    AVB
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    Re: Toro with ch725 Kohler engine 2019/04/04 16:36:55 (permalink)
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    All three specs (3011, 3031, 3037) use the 12 050 01-s filter which is the 3/4-16 thread according Kohler tech support.
    CROSSBOLT
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    Re: Toro with ch725 Kohler engine 2019/04/04 16:56:47 (permalink)
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    Yup. And a filter with that thread will practically fall off!
    AVB
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    Re: Toro with ch725 Kohler engine 2019/04/04 17:19:36 (permalink)
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    Then if you don't mind let me know what you do find for it that fits. Mean while see if a 5/8-16 nut will screw on the threads as that is the next SAE size down that uses 16 tpi.
     
    Anyway it is strange that this kt725 has an oddball filter nipple.
    CROSSBOLT
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    Re: Toro with ch725 Kohler engine 2019/04/04 18:15:37 (permalink)
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    Now, THAT is an elegant idea! 5/8"- 16 nut! Wilco very soon. Hey, if there is one wierd production anomoly, I will get it! Standby.....
    CROSSBOLT
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    Re: Toro with ch725 Kohler engine 2019/04/05 15:33:30 (permalink)
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    Got a 5/8" -16 nut and it is smaller than the nipple for the filter. The OD of the nipple is .730" accordingmto my dial vernier caliper, the ID of the threads on the OE filter is .690". The factory insists this is a 3/4-16. The dimensions are a bit different rendering that ONLY a Kohler filter will fit since their max-min thread dimensions are about .020" smaller than SAE specs for hydraulic fittings while still being nominally 3/4-16.
    post edited by CROSSBOLT - 2019/04/05 16:05:49
    CROSSBOLT
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    Re: Toro with ch725 Kohler engine 2019/04/05 18:05:26 (permalink)
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    Ordered a Kohler filter from Amazon. It will be coming from Jack's for a couple bucks less than Jack's listed price! I think it's kinda snitty designing the filter set-up so the ONLY filter that will work is the manufacturer's brand. How "special" does a spin-on have to be? What a royal PITA this has been! This is what happens when you let the sales pukes dictate to engineering. Good engine, however......
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