Question about Toro Zero Turn Rider 74833 Lawn Mower Tractor Rider Ztr

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My toro fh 580v smokes when i start it what is causing it to smoke?

My toro ztrn smokes when I stat it. it a white smoke is that the rings or something else? it's a fh 580v 19hp motor on a 52" deck

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  • Master
  • 739 Answers

Of course they (below) haven't mentioned that you may simply have carbon build up on your intake valve, which would allow normal oil from the head to drain into the cylinder. Before junking your mower, or doing a tear-down, I'd suggest a cleaning agent to remove the carbon from the valves first.

One thing I have done is during an oil change, replace the oil with kerosene and run until the engine is hot, drain it out, allow to cool, and then replace the oil. seems to remove carbon build up fairly effectively, and extends the life of your equipment.

Posted on Mar 23, 2015

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  • Contributor
  • 28 Answers

Hi.. your inlet valve stem seals are worn out, so oil will be drawn into the inlet with vacuum , as well as fuel...this is why it smokes on start up...quick fix , do an oil change but use a car oil like 15W40 weight oil
im sure you would be using a 10w30 oil now ,using a thicker oil might stop the smoke on start up, or it just wont smoke as much, regardless of using a thicker oil...the valve stems will still need to be replace.....good luck

Posted on Jun 07, 2014

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Posted on Jan 02, 2017

SOURCE: I have a Toro Super Recycler GTS 6.5 HP. Upon

Oil level too high? *(check oil level with dipstick fully screwed down!)

or

Leaking valve guide *(rare.)

Cylinder walls not sealing well and oil leaking past rings. *(less rare...nothing you really can do about....just getting used up)

I would change the oil and be very careful to fill only within the full range.
Then, run the unit once to clear the muffler out.

Good luck and be careful!

Posted on Jul 22, 2010

#1 Taper
  • 1040 Answers

SOURCE: have a toro recycler white

This is not a good sign!! You have blown a head gasket, the rings around the piston have gone bad, or you have blown a hole in the piston.The head gasket isn't so serious, and it may be worth fixing. However, the other two scenarios are serious and wouldn't be worth fixing if the mower is old.

Good Luck!

Jim

Posted on Aug 05, 2011

#1 Taper
  • 1040 Answers

SOURCE: Was using my toro lawn

You have big problems my friend! You have blown a head gasket, or broke the rings around the piston. The gasket isn't as bad as the rings. But neither is a good sign. It may be time to get a new mower; sorry for the bad news..... :-(

Jim

Posted on Aug 12, 2011

nelsondonnel
  • 1 Answer

SOURCE: I have a Toro Time

What you have is an engine that has a carburetor problem that has probably diluted the oil to the point that the crankcase is over-filled. Drain the oil and filter, then replace oil. Sometime the carburetors on these unit will become porous or cracked inside and will allow gas to enter the fuel bowl while the engine is not running. Some signs of this is that the engine will drag or static lock when you try to crank it over.

I've gone to the point to even put an inline fuel shut-off valve in the fuel line so that the fuel can be shut off when the engine is not running to temporarily deal with this problem until a new carburetor can be located and installed.

Posted on Sep 13, 2012

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