Go BottomJinma exhaust leak
 | corvetteguy
Join Date: Mar 2005 Posts: 49 PA 
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2005-03-31 109161
My 03 JM-180 with 9 hours has what
I think is a leak (hole) in the
horizontal curved mounting pipe
below the muffler. Is this intenional
to let water out if it gets in the muffler?
Where can I get a replacement if it is not to be
there?
How much should it cost?
Thanks
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 | greg_g
Join Date: Jan 2004 Posts: 1816 Western Kentucky 
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2005-03-31 109165
By "horizontal curved" I assume you mean the 90 degree elbow that bolts directly to the exhaust manifold. Does it connect to a conventional vertical muffler, or to an under-the-tractor type exhaust?
//greg// ....
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| corvetteguy
Join Date: Mar 2005 Posts: 49 PA
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2005-03-31 109172
Yes it is the curved pipe to the
vertical muffler. ....
Picture Link
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| greg_g
Join Date: Jan 2004 Posts: 1816 Western Kentucky
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2005-03-31 109173
I think the 2 cyl and 3 cyl use a similar elbow. I can speak for the 3 cylinder, in that your "hole" may likely be as a result of a bubble that formed during the casting process. The muffler tip should already be angled to prevent rain from entering anyway. With only 9 hours, it's definitely a warranty item. But it might be simpler just to have a welder close the hole.
//greg// ....
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 | affordable
Join Date: Sep 2004 Posts: 93 Bellville,Texas
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2005-03-31 109213
We have the 90's in stock if you want to replace it,it is most likly a sand pit from the casting. We sell them for $ 35.00 plus shipping.Let mw know if we can help you
Tommy
Affordable Tractor Sales ....
Link: web page
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| chipuren
Join Date: Jul 2003 Posts: 193 Arkansas
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2005-03-31 109226
The two cylinders have a small hole in the elbow to let condensation and rain water, etc. drain. If you plug it, I would be sure to keep a tin can on the exhaust pipe if you park outdoors... ....
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| greg_g
Join Date: Jan 2004 Posts: 1816 Western Kentucky
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2005-03-31 109233
Chip - it's not an open topped pipe. The picture CorvetteGuy linked to shows the conventional angled exhaust outlet. Only rain gettin in there would have to be blowing sideways.
//greg// ....
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| corvetteguy
Join Date: Mar 2005 Posts: 49 PA
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2005-04-01 109244
Guys;
thanks for the info. I will see if the pipe
comes off easilly. I hope a through inspection
will let me know if the hole is man made or the
result of chineese dirt when they cast it in the
field.
I am an novice in stick welding and might attempt
a substandard looking weld job. Maybe JB Weld will
do a better job.
As I plan to shed the tractor, the only time rain
should get into the angled tipped muffler is when
I am using it. ....
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| greg_g
Join Date: Jan 2004 Posts: 1816 Western Kentucky
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2005-04-01 109249
Even if it was a straight tipped muffler, no rain will enter the pipe while the engine is running. The exiting exhaust pressure will prevent rain from entering the exhaust pipe of a running engine.
//greg// ....
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 | oneace
Join Date: Mar 2004 Posts: 1490 south central pa
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2005-04-01 109272
Rain is not what they put the hole in there for. It is there to let the condensation drip out that forms when the exhaust cools. Plug get and it will rust to pieces. ....
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| greg_g
Join Date: Jan 2004 Posts: 1816 Western Kentucky
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2005-04-01 109274
Your guess supports Chip's claim, but is curious in the face of the fact that the 3 cylinder in that same tractor has no "drain hole"
//greg// ....
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| chipuren
Join Date: Jul 2003 Posts: 193 Arkansas
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2005-04-01 109282
I have sold dozens of the little two cylinder farm pro and they all have this same hole exactly at the bottom of the elbow. We do get rain going horizontal from time to time here in Arkansas by the way (sometimes the wind goes in circles too!). The elbow comes with the engine as supplied to the tractor company and not the tractor companie's part.
I have not found these little vents to be much of a bother. ....
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| greg_g
Join Date: Jan 2004 Posts: 1816 Western Kentucky
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2005-04-01 109283
Of course...same tractor, different engine manufacturers. I forgot the two cylinders were Jiangdong. Mine were three cylinders from Yangdong. Makes sense now, thanks Chip.
//greg// ....
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