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720 PONY MOTOR


 
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kjrtractors
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Joined: 30 Aug 2011
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PostPosted: Thu Sep 27, 2012 5:02 pm    Post subject: 720 PONY MOTOR Reply to specific post Reply with quote

The pony motor on 720 smokes really bad. The motor starts and runs good. I have changed diaphrams in auto shutoff that did not help. It does not use oil and plugs dont foul. Also has black oil come out exhaust tube and muffler. Is there anytype oil i can use that will not smoke so bad. Does not hurt anything except smokes building full of smoke.
 
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FactoryFarmer
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Joined: 05 Feb 2010
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Location: Illinois

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PostPosted: Thu Sep 27, 2012 5:22 pm    Post subject: Re: 720 PONY MOTOR Reply to specific post Reply with quote

Your pony motor needs to be overhauled and there is really no way around it.
 
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wijim
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Location: neenah, wi

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PostPosted: Thu Sep 27, 2012 6:18 pm    Post subject: Re: 720 PONY MOTOR Reply to specific post Reply with quote

Might just as well run her like it is till it dont run no more then rebuild it.
 
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teddy52food
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PostPosted: Fri Sep 28, 2012 5:28 am    Post subject: Re: 720 PONY MOTOR Reply to specific post Reply with quote

Where is the smoke coming from if it doesn't use oil??????????????? Water????????
 
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bill mart
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PostPosted: Fri Sep 28, 2012 6:00 am    Post subject: Re: 720 PONY MOTOR Reply to specific post Reply with quote

black smoke sounds like too much fuel/not enough air.They are noted for lighter colored exhaust smoke when the engine is worn out i.e. rings. Bill
 
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buickanddeere
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PostPosted: Fri Sep 28, 2012 6:30 am    Post subject: Re: 720 PONY MOTOR Reply to specific post Reply with quote

Try straight 40 weight oil.
Is it really firing on four cylinders? The starting engine should be able to rotate the diesel under compression continuously with 0F outside temperatures.
Many times I see starting engines at shows that are claimed to be 100% but will only slam start the diesel if your hand eye coordination is quick.
 
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BushogPapa
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PostPosted: Fri Sep 28, 2012 8:16 am    Post subject: Re: 720 PONY MOTOR Reply to specific post Reply with quote


You have an "Auto-Shut-off" on your 720..??

No such thing on MINE...?????

If that diaphragm involves an oil line, I would suspect it is feeding oil to the fuel..
Your Pony is stated to have something like 10 Wt oil..not positive, but I know it is not supposed to be more than 20 Wt..
Are you sure the Breathers are not plugged..??
Ron..
 
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kjrtractors
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PostPosted: Fri Sep 28, 2012 5:47 pm    Post subject: Re: 720 PONY MOTOR Reply to specific post Reply with quote

The later 720 have the auto shutoff i have replaced the diaphrams made no differance. Replaced the plugs today they were all a little oily but not fouled beyond firing. I guess i will just let her smoke kind of embarassing in public.
 
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bill mart
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PostPosted: Fri Sep 28, 2012 7:44 pm    Post subject: Re: 720 PONY MOTOR Reply to specific post Reply with quote

the other thing about not using oil,how long does a pony run ? and how much oil could it burn in that short amount of time? bill
 
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