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I replaced cam, water pump and fuel pump on my jd 345. after running the mower a couple of hours, white smoke (steam) started coming out of the exhaust. i took heads off and replaced head gaskets but that did not fix it. the radiator/motor will not hold water and the water will run out of exhaust without motor running. what is the problem?

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Posted on Jan 02, 2017

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SOURCE: white smoke or steam coming out of exhaust pipe,

Its funny that everyone has solved the problem without any answers to critical questions. In this case, everyone is right and everyone is wrong. ONLY careful testing and observation will determine if there is an actual problem. I do not solve problems just to be first. Even in a hands-on situation I refuse to jump to conclusions before testing, otherwise you run the risk of at best, "chasing your tail" or at worst, tearing into a perfectly good engine to prove nothing!!!
Happy New Year!!!!

Posted on Jan 01, 2009

  • 23 Answers

SOURCE: water and white smoke comming out exhaust

your cooling system is preasureising due to a leaking cylinder head gasket the white smoke you see is coolant passing through the exhaust valve on the offending cylinder have the cooling system tested for CO content hope this advice helps

Posted on Feb 24, 2009

SOURCE: Lawn mower engine runs rough and puts out white smoke

Pull the carburetor and clean it for staters.Be sure to change oil any little bit of moisture in the crankcase will let it smoke white by seeping by the valves and piston rings.Also put a little small amount of dry gas in the gas tank to rid all of the water that may have been left in the tank. I some of this will help you.

Posted on Mar 19, 2009

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SOURCE: JD LX188 rider mower engine runs rough

black exhaust would usually indicate that the engine mixture is too rich. This can be caused by a dirty air filter which may need replaced if it is the paper element type, or may need washed out if the foam type. It may also be that the carb' needs the mixture adjusted and this is done by turning the adjusting screw clockwise a very little at a time until the engine runs smoothly without black smoking. Beware of over tightening the adjustment screw as the end may be damaged or worse, nip off. hope this solves your problem

Posted on Mar 30, 2009

  • 232 Answers

SOURCE: water in oil

I have yet to see a cracked head on a 22R,so more than likely a blown head gasket,unless you overheated and warped the head and worst case a hole between the cylinder wall and water jacket(this is pretty rare).The only way to tell short of using some expensive tools or taking to your local shop is to pull the head and inspect the gasket for leakage wich is generally fairly obvious(separation of the gasket layers,oil and water between water and oil passages)and checking the head deck for warpage.If there is obvious leakage in the gasket you're looking at a top end gasket set if the head is slightly warped you can get away with a thick graphite head gasket,I personally use these as they are very forgiving on slightly warped and scratched head decks and inepensive also,but a severly warped head will require milling at a machine shop or replacement.

Posted on Apr 09, 2009

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