Anyone got a Honda GX120 Workshop Manual?

[Gunners]

As title suggests, I'm after a workshop manual (or at least the torque setting to rebuild) a Honda GX120 engine (there seems to be different models, are they principally the same or different internally?) on my Ammann wacker plate. It had a terrible smoking habit and you cant take it anywhere without it lighting up and having a puff. Smoking isnt allowed in schools anymore and as a lot of my work is in them, I thought I should do something about it!
Bore seems good, so I think its a fairly simple new rings and gasket set job. A sub £50 fix, however, in my rush to take it to bits, I have overlooked the complications in putting it back together. Anyone done one before? Any tips? Ideally, I need the torque settings for the conrod, crankcase, head etc and maybe how you go about timing them as I think the crankshaft might have jumped a tooth or two when I was taking it apart.
I know I could put a Loincin on it, or buy a new Honda engine, or just let it smoke as its old enough to know better. But I don't want to do that, I want to fix it, its cant be that hard can it!
So your help guys is greatly appreciated.
A photo of it on the bench is attached as we all like to critique each others workshops and I don't want to spoil the fun!

 

[Steve]

I think the gx 120 are pre much the same the final part of the engine code signifies the crank output type ie 19 mm straight keyed or 3/4‘’ or tapered shaft etc.
Nice workshop btw

 

[hiluxman]

How bad did it smoke?

 

[craig]

http://www.ipspower.com/images/documents/technical-information/GX120-160-200UT2-Shop-Manual.pdf


Page 35

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[Gunners]

How bad did it smoke?

The equivalent of 40 a day - in engine terms, I had to keep topping it up with oil once a job.

I think the gx 120 are pre much the same the final part of the engine code signifies the crank output type ie 19 mm straight keyed or 3/4‘’ or tapered shaft etc.

Thanks Steve, I have the 19mm shaft so that makes sense and should make it easy to source parts for.

 

[Gunners]

http://www.ipspower.com/images/documents/technical-information/GX120-160-200UT2-Shop-Manual.pdf

Thank you Craig, seems to be what I need. As always, this forum always has the answer

 

[GazCro]

If you're looking online for info broaden it by searching for gx160 stuff. Used in karts and a lot and stuff like torque settings won't be that different. Tbh I think you're being a bit ott just get it nipped up

 

[V8Druid]

If you're looking online for info broaden it by searching for gx160 stuff. Used in karts and a lot and stuff like torque settings won't be that different. Tbh I think you're being a bit ott just get it nipped up

my right arm's got a set of torque settings built into it ..... never fails me ... ' least not yet

 

[Steve]

I am a real fan of the honda GX range I have quite a few in various applications, you have done well to wear one out on a wacker plate.

 

[Rob65]

I’ll be interested in how this goes.

I have a little Honda engine on a mixer that smokes badly. Can’t recall the model but it’s a small one about 50cc I think.

I’ve fitted new rings and valve guide seals, it’s improved a bit but is not like it should be.

And yes before anyone asks I did break the glaze in the bore when I put the new rings in. Also make sure you put the rings on the piston the right way up, it’s important- don’t ask how I know

Got luck

Rob