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Bore and stroke of Tecumseh engines.


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#1 propane1 ONLINE  

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Posted March 22, 2015 - 04:08 PM

I would like to know the bore and stroke of an L head snow blower 8 hp and 10 hp engines. If they are the same cubic inches, how does the 10 hp engine gain the 2 extra hp over the 8 hp. Wondering, Noel.
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#2 boyscout862 OFFLINE  

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Posted March 22, 2015 - 04:34 PM

Check the manuals in our Manuals Section. There is a fairly large Tecumseh section. Good Luck, Rick


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#3 JDBrian OFFLINE  

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Posted March 22, 2015 - 07:17 PM

Noel, I think the blocks are the same size but the 10hp has a larger bore. It makes it easy to swap in a 10 for an 8 if you find one. There are some really good Tec. manuals in the manuals section including the Peerless manual on all the transmissions. 


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#4 DH1 OFFLINE  

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Posted March 22, 2015 - 08:04 PM

Believe it or not but

 

HH80  HH100   OH140 all have the same bore and stroke, same displacement.

 

8hp   10hp   14hp

 

I don't know what the difference is in the hh80 and hh100, where they got the extra 2hp but the OH140 is an overhead valve engine.


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#5 TAHOE ONLINE  

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Posted March 23, 2015 - 07:44 AM

HH80.jpg

hh80 2.jpg

hh80 3.jpg

 

HH120   specs.jpg

hh120   specs2.jpg

 

 

OH specs.jpg

OH specs 2.jpg

OH specs 3.jpg


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#6 stiemmy ONLINE  

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Posted March 28, 2015 - 05:43 AM

Techy was not the only manufacture to do this, but believe it or not some outboard motors as well. The hp differences were achieved by simply using different carburation.
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#7 FixItCharlie OFFLINE  

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Posted March 28, 2015 - 10:36 AM

Yes some Evinrude & Johnson outboards were famous or infamous for this. I remember a few 10 HP lakes that would require you the open the hood on 9.5 HP outboards before you could launch your boat which was the cheap catch. Other of these lake would allow you to launch & after running the boat would check then which usually resulted in a ticket being issued.

 

Charlie


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#8 stiemmy ONLINE  

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Posted March 29, 2015 - 06:30 PM

Yes some Evinrude & Johnson outboards were famous or infamous for this. I remember a few 10 HP lakes that would require you the open the hood on 9.5 HP outboards before you could launch your boat which was the cheap catch. Other of these lake would allow you to launch & after running the boat would check then which usually resulted in a ticket being issued.

 

Charlie

Oh yes you are correct!!!! lol Been there done that.

 

Off the top of my head, Chrysler outboard corp was noted for doing this as well. 



#9 dodge trucker ONLINE  

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Posted March 29, 2015 - 07:28 PM

I have a newer model (1999ish  I think) 11HP Tecumseh OHV Snow king engine.  As I remember bore and stroke is the same as that of the L head 8HP  Snow King engines. 

 

And yes I agree about the outboards.  In fact I have a 1975  7-1/2 HP Merc here right now that I am checking out for a neighbor. I went to EPay to find a part that he needs (shift handle)  and saw a kit listed, to convert a 7.5 down to a 6HP.  It was a "restrictor plate" along with a bunch of "6HP" decals to replace all the 7.5 HP decals.  Over the years I have dealt with alot more Evinrude/Johnson than any other outboards, and their V4 was that way. all the way from 85 HP to (if I remember right) 140 HP were like that. different carbs and reeds between the different HP models.


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