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Oh160 Vs Hh160


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#1 speedyg OFFLINE  

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Posted February 22, 2013 - 11:58 PM

I am thinking of putting an oh160 in my 1656.  The motor that came in the tractor is a hh160 and I am wondering if it will work and what the differences are between the two.  I looked under the bolens manuals and could not find a tec manual, if someone could direct me to one that would also be great.

 



#2 8tyman8 OFFLINE  

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Posted February 23, 2013 - 12:52 AM

The oh and the hh are the Same engines just they changed the Ser's as the of HH stood for Heavy duty Horizontal and the oh stood for something like Over head Horizontal ? but they are the same engine how ever the oh would be Newer i use the oh numbers to get parts as the hh does not show up on my parts suppler  Computer ..

Best of luck

Cheers

Ty


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#3 speedyg OFFLINE  

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Posted February 23, 2013 - 08:23 PM

Thanks 8tyman8 for responding.  On one of the photos that I saw it looked like some of the electrical wiring was different but I could be wrong.  So it sounds like it should bolt and go on my h16 ah!

If anyone can get me to a oh160 manual I would be happy,or maybe like you say the hh160 is the same.



#4 olcowhand ONLINE  

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Posted February 23, 2013 - 08:26 PM

Manual is  HERE  Covers many cast iron models.


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#5 DH1 OFFLINE  

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Posted February 23, 2013 - 08:35 PM

I don't think there is a HH160. ???

 

I thought HH120 was the biggest HH engine and all HH engines are flat-heads.

 

OH120, OH140, OH150, OH160, OH180, are all Overhead valve engines based on the HH series.



#6 olcowhand ONLINE  

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Posted February 23, 2013 - 09:08 PM

I don't think there is a HH160. ???

 

I thought HH120 was the biggest HH engine and all HH engines are flat-heads.

 

OH120, OH140, OH150, OH160, OH180, are all Overhead valve engines based on the HH series.

 

That's what I thought as well Doug!



#7 speedyg OFFLINE  

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Posted February 23, 2013 - 10:56 PM

Thanks olcowhand!!  The cowling on my motor is stamped HH-160 followed by the seriel number??



#8 speedyg OFFLINE  

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Posted February 23, 2013 - 11:10 PM

I don't think there is a HH160. ???

 

I thought HH120 was the biggest HH engine and all HH engines are flat-heads.

 

OH120, OH140, OH150, OH160, OH180, are all Overhead valve engines based on the HH series.

In the bolens service and repair manual for medium tube frames they list the HH-140 in the G-14 and the H-14.  They list a HH-150 in the 1556 and the HH-160 in the 1656 or the H-16.


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#9 MH81 ONLINE  

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Posted February 24, 2013 - 06:30 AM

In this manual :http://www.tecumsehp...Service/BSI.pdf
They spec the OH120-160 separate from the HH140-160, but they always list them together, as in they use the sme plug, etc. I will keep looking.
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#10 MH81 ONLINE  

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Posted February 24, 2013 - 06:45 AM

Everything I see says that they mfg these engines as "HH" for a while and then changed the designation to OH when the other engines got OHValves.

While there is the occasional odd reference (as in the tech service bulletin above) the general consensus is that any repair parts (gaskets, etc) are interchangeable.
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#11 DH1 OFFLINE  

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Posted February 24, 2013 - 07:44 AM

Learn something new everyday. :thumbs:



#12 speedyg OFFLINE  

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Posted February 24, 2013 - 03:57 PM

Everything I see says that they mfg these engines as "HH" for a while and then changed the designation to OH when the other engines got OHValves.

While there is the occasional odd reference (as in the tech service bulletin above) the general consensus is that any repair parts (gaskets, etc) are interchangeable.

Thanks for research on the subject MH81.  It looks like the HH was used for the first year of production and then was changed to the OH.


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#13 bolex OFFLINE  

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Posted February 25, 2013 - 07:32 PM

yup i own a first year 1656 with a HH160 tec this engine is exactly the same as the OH160 in my 78 G16XL the wiring can be different based on the charge rate , the HH uses a 10 amp with remote mount regulator and my OH uses a 20 amp system with an air cooled fan shroud mounted regulator and there are other systems that may have other wiring differences , if you plan on getting rid of the old motor i want first dibbs as i need an original carb for mine, one carb won't run two tractors (have been using the OH carb on the HH)for two seasons :smilewink:  :thumbs:



#14 jpswift1 OFFLINE  

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Posted February 17, 2016 - 11:38 PM

I know this is an old thread but could anyone tell me what is different between the OH120, OH140, OH160, and OH180?  What models share the same parts?  Are they all the same displacement?  Thanks guys.



#15 wurzel OFFLINE  

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Posted February 18, 2016 - 12:49 PM

I know this is an old thread but could anyone tell me what is different between the OH120, OH140, OH160, and OH180?  What models share the same parts?  Are they all the same displacement?  Thanks guys.

Hi OH120 is 12HP OH 140 is 14 HP etc  they are  different displacments refer to the download manual higher up in the thread for the specs page 67 

cheers nick


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