x750 exhaust
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    Question x750 exhaust

    I bought a used x750 (diesel). When I start it (even when it's hot outside) the muffler blows a dark smoke for about 30 seconds each time I start it. Is it supposed to do this?

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    jgayman's Avatar
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    It is common for a diesel to emit dark exhaust for a few seconds when started. 30-seconds seems like a long time though.
    2012 2720 -- 200CX Loader -- 54" Quick Attach Snow Blower -- Frontier LR5060 Rake -- Land Pride RB1660 Blade (Hydraulic Angle) -- Artillian 42" Forks -- Ken's Bolt on Grab Hooks -- Fit Rite Hydraulic top-link -- 2013 X500 for mowing duties

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    My x758 doesn't do that. Maybe a quick puff immediately as it starts but that's all.

    Rob
    2016 x758 w/60" HC mower, 54" snowblower, MC519 bagger
    2010 2520 w/61" H130 loader, TA 42" forks, KK 60" Pro tiller, iMatch quick hitch, KK middle buster
    1996 345 - Traded
    Other toys: Stihl BR600 backpack blower; McCulloch chainsaws: 10-10S, 700, 805, 10-10; JD trimmer

    2520:__________________________x758:__________________________Faithful 345:___________________

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    Black smoke is too much fuel and or poor combustion.

    Check the simple stuff air filter, fuel filters, oil change, good quality clean fuel in the tank, possibly add some fuel additive to help clean up any built up carbon. You may have a slightly fouled injector tip or the like.

    Depending on just how used your tractor is and how well it was maintained you may also have low compression which is more noticable when the engine is cold. There could also be a fouled injector tip which could lead to poor combustion with a cold engine.
    X738, 54HC deck w/ auto connect, 3PH
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    TJR345's Avatar
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    Could be a couple of things,not enough air check the filter and intake for nest if it sat for awhile. Faulty injector can cause the problem.
    Tom

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    Maybe the prior owner like rolling coal so he put a tuner on it...
    DaubsNU1 likes this.

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    Just to cover the bases, are you waiting for the glow plug light to go out before cranking the engine?

    Sent from my SM-G900R4 using Tapatalk
    X748 - Curtis cab; X758 - 54" mower; X754 - 54" mower; 1025 TLB
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    Quote Originally Posted by BigBlue View Post
    Maybe the prior owner like rolling coal so he put a tuner on it...
    I've had tuners on all my diesel trucks. I would totally get a tuner for my X758 if they made one!!!

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    X758
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    Should I be starting this at full idle?

    I do wait for the glow plug light to shut off.

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    I have only ever started mine at low idle and get a quick puff of smoke for 1 second.

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    BigJim55 likes this.
    X758
    54HC Deck w\auto-connect
    54 Quick Hitch Snowblower

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