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Honda GX690 into 1976 Sears ST12

honda gx690 sears st12 repower tecumseh hh120

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#16 rewilfert OFFLINE  

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Posted July 26, 2017 - 08:18 PM

The muffler has arrived and I picked up a few more parts for this swap, just in case I need them.  I was able to find a battery tray in the correct orientation that has the clutch pulley mounted to the underside.  I also picked up the frame side plates and front grill lower bracket.  If I end up using the battery tray mounted clutch, I'll install these frame side plates to remove the pivot point for the existing clutch.  That just cleans up the installation a bit, nothing more.  If it comes to pushing the grill forward for more clearance I'll use this bracket.  It was easier to buy one rather than making something custom myself.  These parts all came from a SS16 tractor.

35353248534_c9f409a12b_c.jpg2017-07-26 19.49.42 by rewilfert, on Flickr

35353248164_703b8b5939_c.jpg2017-07-26 19.43.54 by rewilfert, on Flickr



#17 rewilfert OFFLINE  

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Posted August 19, 2017 - 09:09 PM

I finally had the time to take some pictures of the Honda engine.  I hung the muffler on it as well.  The control box on the right side of the engine will be removed and the ignition switch will replace the original switch on the tractor.  I may reuse the hour meter and oil level low light as well.  The voltage regulator/rectifier will get mounted somewhere near the engine.  Some of the wiring may need to be lengthened to accomplish these things.  Power wiring to the tractor is pretty straight forward.  The battery positive goes to the starter and there is a wire on the regulator/rectifier harness that grounds to the frame.

 

I'll also need to make a 90 deg elbow to deflect the forward facing exhaust away from the tractor.

 

It looks like the belt guard mounted on the Tecumseh engine should swap straight over to this one without modification.

 

35844674024_18ea3ec5d5_c.jpg2017-08-19 21.03.22 by rewilfert, on Flickr


36541336261_1d7a30f97f_c.jpg2017-08-19 21.03.01 by rewilfert, on Flickr


36541336791_07f6f7c7fd_c.jpg2017-08-19 21.03.39 by rewilfert, on Flickr


36284144460_00b2207f10_c.jpg2017-08-19 21.02.43 by rewilfert, on Flickr


35844674764_6ec7e4787d_c.jpg2017-08-19 21.04.10 by rewilfert, on Flickr


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#18 John Arsenault ONLINE  

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Posted August 30, 2017 - 08:13 AM

This is going to be nice. Following !



#19 rewilfert OFFLINE  

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Posted August 30, 2017 - 10:23 AM

Thanks.  I should be done with the tractor for the season by the end of September.  That's my target start time for the project.



#20 John Arsenault ONLINE  

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Posted September 05, 2017 - 07:11 AM

Thanks.  I should be done with the tractor for the season by the end of September.  That's my target start time for the project.

 

 

Nice I can't wait to see and hear it. I just got a 14 hp Robin in mine and it was a lot of fun to do. No where near the challenge your up against thats a big engine. 

 

BTW what are your plans for this tractor after your done, whats its job going to be with all those horses. 



#21 rewilfert OFFLINE  

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Posted September 05, 2017 - 09:05 AM

I just use my tractor to cut the yard and pull a small trailer around.  I have no use for this much HP, but it was the size and shape of the engine that made me go this route.  I needed a V twin engine to fit in the available space.  All the Honda V twins are the same physical size and this one was readily available.  I think getting the hood to fit around the muffler is going to be the only real challenge.


Edited by rewilfert, September 05, 2017 - 09:06 AM.

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#22 MNGB ONLINE  

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Posted September 05, 2017 - 01:04 PM

I don't think you got it in there I see no pictures no pictures = not done :D :dancingbanana: :wave: :bigrofl:


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Also tagged with one or more of these keywords: honda gx690, sears st12, repower, tecumseh hh120

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