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So I have a 1253 with a Tecumseh HH120, The "coil" went out and I'm searching on ebay... I found an OH160 Solid State Ignition. Would this also work with an HH? I understand 8,10,12,and 16hp all use the same Coil. All I need to know is what is the difference between HH and OH?
Thanks guys,
Sarge-
 

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So I have a 1253 with a Tecumseh HH120, The "coil" went out and I'm searching on ebay... I found an OH160 Solid State Ignition. Would this also work with an HH? I understand 8,10,12,and 16hp all use the same Coil. All I need to know is what is the difference between HH and OH?
Thanks guys,
Sarge-
Sarge,
HH means horizontal-heavy duty(cast iron)
OH means overhead valve-heavy duty(cast iron):thThumbsU
 

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Some older 15hp overhead valve engines had model number HH150. I have one. It is obviously OHV but the tag reads HH150. I don't know if that practice extended to other displacements.

By coil, do you mean the stator failed?
 

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No by coil I mean the magneto/solid state ignition coil I've heard a few different titles given to the unit. I just need to know if it's the same for HH and OH, it looks the same so I'd assume they are the same. But you know what happens when one assumes... lol
 

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OH - HH, they are the same if your motor is and OHV. They changed the numbering mid stream on the same engines, and now most parts are found using the OH number. If your engine model says HH120, think of it as OH120 from here on out.

If that coil has the same look as your old one, then it should work fine. There are at least 3 different styles of these units (maybe more) - http://home.earthlink.net/imagelib/sitebuilder/misc/show_image.html?linkedwidth=actual&linkpath=http://home.earthlink.net/~edstoller/sitebuildercontent/sitebuilderpictures/3up.jpg&target=tlx_new .

If you want to just convert to a GM HEI, and automotive coil, read here - http://www.mytractorforum.com/showthread.php?t=77916 .
 
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