Jump to content

Garden Tractors and Parts on eBay



Photo
- - - - -

Honda GX690 into 1976 Sears ST12

honda gx690 sears st12 repower tecumseh hh120

  • Please log in to reply
32 replies to this topic

#16 rewilfert OFFLINE  

rewilfert
  • Member
  • Member No: 87385
  • 37 Thanks
  • 52 posts
  • Location: Kennesaw, GA

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  

rewilfert
  • Member
  • Member No: 87385
  • 37 Thanks
  • 52 posts
  • Location: Kennesaw, GA

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


  • KennyP and MNGB have said thanks

#18 John Arsenault OFFLINE  

John Arsenault
  • Senior Member
  • Member No: 76279
  • 1,948 Thanks
  • 1,009 posts
  • Location: Maine

Posted August 30, 2017 - 08:13 AM

This is going to be nice. Following !



#19 rewilfert OFFLINE  

rewilfert
  • Member
  • Member No: 87385
  • 37 Thanks
  • 52 posts
  • Location: Kennesaw, GA

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 OFFLINE  

John Arsenault
  • Senior Member
  • Member No: 76279
  • 1,948 Thanks
  • 1,009 posts
  • Location: Maine

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  

rewilfert
  • Member
  • Member No: 87385
  • 37 Thanks
  • 52 posts
  • Location: Kennesaw, GA

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.

  • John Arsenault said thank you

#22 MNGB ONLINE  

MNGB
  • Senior Member
  • Contributor
  • Member No: 62466
  • 1,789 Thanks
  • 1,259 posts
  • Location: Minnesota

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:


  • John Arsenault said thank you

#23 John Arsenault OFFLINE  

John Arsenault
  • Senior Member
  • Member No: 76279
  • 1,948 Thanks
  • 1,009 posts
  • Location: Maine

Posted October 07, 2017 - 06:39 AM

Beginning of Oct. and I don't see no pictures or video either.....We may never get to find out.



#24 rewilfert OFFLINE  

rewilfert
  • Member
  • Member No: 87385
  • 37 Thanks
  • 52 posts
  • Location: Kennesaw, GA

Posted October 07, 2017 - 07:05 AM

It’s been warm so far this fall and the grass keeps growing. I can’t start this project until I’m done using the tractor for the season. I’m going to give it a few more weeks and hopefully things will change.

#25 JBRamsey ONLINE  

JBRamsey
  • Senior Member
  • Member No: 61995
  • 1,338 Thanks
  • 778 posts
  • Location: North Carolina

Posted October 07, 2017 - 07:20 AM

If it's like last summer, I mowed grass Christmas week and again the first week of January. It was nuts.

#26 rewilfert OFFLINE  

rewilfert
  • Member
  • Member No: 87385
  • 37 Thanks
  • 52 posts
  • Location: Kennesaw, GA

Posted October 17, 2017 - 07:48 PM

I think the weather is finally making a turn here.  The grass has slowed down and I think I may have made my last cut on the tractor for the season.  Once I get some free time, I'll start digging into this project.  On an interesting note, I ran across a few pictures the other day of a similar tractor with this same engine installed.  It looks like what I have been envisioning as far as modifications to the bodywork go.

 


37094054403_43071f32c8.jpg1973 tractor left side by rewilfert, on Flickr

37505751250_4828795a69.jpg1973 tractor right side by rewilfert, on Flickr


  • KennyP and John Arsenault have said thanks

#27 John Arsenault OFFLINE  

John Arsenault
  • Senior Member
  • Member No: 76279
  • 1,948 Thanks
  • 1,009 posts
  • Location: Maine

Posted October 18, 2017 - 07:24 AM

Looks like it will be a nice fit, some minor cutting, but you will have one nice ride when your done. 

 

I been mowing with this one and I love it....I had a good running tecky in it before I did the swap but I don't miss it at all. Mowed my lawn 3 times on one tank of gas and in between the 3 mows it has hauled wood, pulled a car and a few other odd things we do with tractors. 

 

20171014_091604.jpg

 

20170916_124453.jpg

 

Only reason I decided to ditch the tecky is because I was shopping for extra parts to assure that I would make it though the winter and was not finding everything I needed and what I was finding was costing way to much once I starting putting everything together in a shopping cart. For a few hundred more I just bought a new engine all together. 

 

Only issue I had last year with the tecky was the carburator started to leak, it was an easy fix but my plans were to get a new carb and an extra set of electronics just in case but it turned into an engine instead. I already bought an lme once off of ebay and the float bowl fell off so I didn't want to try that again. 

 

Perfect example 219.00 for a set of 50 plus year old electronics 

https://www.ebay.com...Q8AAOSwKZ5ZxXLi  

 

 

179.00 for an lme carburator https://www.ebay.com...tUAAOSwiGJZeT4u

 

 

Then I get my new Subaru Robin 

 

Carburetor 65.00 brand new  https://www.ebay.com...ckAAOSwEzxYcDG8

 

Coil 50.00 brand new shipped to my door. https://www.ebay.com...okAAOSwq1JZDd63

 

Thats what pushed me away from the teckys. I'll just let the collectors have them I need my machine for daily use. 

 

 

 

 


  • KennyP and rewilfert have said thanks

#28 rewilfert OFFLINE  

rewilfert
  • Member
  • Member No: 87385
  • 37 Thanks
  • 52 posts
  • Location: Kennesaw, GA

Posted October 18, 2017 - 01:10 PM

That was my line of thinking as well.  When I priced the parts to fully rebuild the HH120, I was into new engine money.  And that was having to get a lot of NOS stuff on eBay (if I could even find it).   I want something that runs when I need it to with parts that are readily available.  I really like these old tractors, but don't need originality, just functionality.

 

It looks like the Subaru engine fit well in your tractor.



#29 rewilfert OFFLINE  

rewilfert
  • Member
  • Member No: 87385
  • 37 Thanks
  • 52 posts
  • Location: Kennesaw, GA

Posted November 09, 2017 - 09:03 PM

I started making some progress on this swap.  The original engine has been removed and the Honda engine has been temporarily set in place.

 

As far as alignment goes compared to the HH120, the Honda engine sits about 3/32" to the left (referencing the machined PTO mounting flange around the crank) and about 5/8" further forward at the crankshaft centerline.  In that position, the rear cylinder valve cover and spark plug just clear the firewall.  The oil fill and dipstick are in a perfect position for accessibility. 

 

Mounting the engine will be accomplished by simply drilling new holes in the frame.  The bolts will go right through without contacting any of the bracing on the underside.

 

The oil drain plug at the rear of the engine is easy to access and there is a clear path for the oil to drain. 

 

The original clutch mechanism will work perfect, no interference anywhere.  A longer belt may be needed if there isn't enough adjustment range in the original.

 

The front lower grill will need to be clearanced on the left side for the engine shroud.  The oil filter will tuck right behind the grill.

 

I was concerned about accessing the rear spark plug for maintenance, but that is a non issue.  Removing the battery and firewall will allow unrestricted access to that spark plug.

 

Overall, this engine is a very good fit to the tractor.  My homework in selecting an engine has appeared to pay off.

 

38243087756_6393a507c9_c.jpg2017-11-09 16.45.16 by rewilfert, on Flickr

38243084126_8a74df906a_c.jpg2017-11-09 20.16.34 by rewilfert, on Flickr

24427243748_e6af3765d5_c.jpg2017-11-09 20.17.28 by rewilfert, on Flickr

38243086056_ef69e206ce_c.jpg2017-11-09 20.17.55 by rewilfert, on Flickr

38266220232_7dea7a41bb_c.jpg2017-11-09 20.18.34 by rewilfert, on Flickr
 


Edited by rewilfert, November 09, 2017 - 09:12 PM.

  • KennyP, CRFarnsworth, MNGB and 2 others have said thanks

#30 John Arsenault OFFLINE  

John Arsenault
  • Senior Member
  • Member No: 76279
  • 1,948 Thanks
  • 1,009 posts
  • Location: Maine

Posted November 11, 2017 - 06:36 AM

Can you cut a round hole with a hole saw into the firewall to make an easy access to the rear plug? Then you just need to pull the battery out.


  • KennyP and rewilfert have said thanks





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

Top