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Christmas project

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Hi, and a happy Christmas to all.

Looking for some advice here, a couple of years ago a bought a cheap K341AS on fleebay, the chap I bought it from said it would not run right and I think he mentioned breathing fire from the carb.  He replaced it on his black hood Wheelhorse with a ‘Chonda’ engine. Since then it has sat at the back of my garage but another recent fleebay purchase was a black hood C105 with new engine.  So time to do something, but not tomorrow! Turkey, but no sprouts is the order of the day.


I thought as a start I should sort the engine out, but can’t easily test it until it can be mounted on the tractor.  I have started to strip it down and the oil is quite clean so hopefully it was looked after.  Now for a few questions:-


The engine is painted grey but normally Wheelhorse have a red engine, could this be a rebuilt engine?, I guess the tractor it came off was mid 80’s so a possibility.


When I took the head off it was all quite clean and only took a light brushing and some carb cleaner sprayed on to clean it up.  However the top of the piston is stamped with .003 and the block with +3.  What does this mean, I thought oversized pistons were plus ten, twenty and thirty thousandth.  Has this engine been rebored?  


Measuring  the valve gaps they are .013” inlet (.008 - .010”) and .020” out (.017 - .019”) is this enough out of tolerance to cause problems?  If so it should be an easy fix to get it going again.


i am thinking of just buying a cheap replacement carb having had problems with a carb on my Raider (K301) after two rebuild kits it still leaked petrol and a replacement carb sorted it all (apart from stopping when v hot, see another post of mine)


The bore of the cylinder is very clean and no scratches so hopefully no problems there.


What do you think?


i don’t seem able to upload pictures from my iPad, it says only allowed 30.7KB,  what’s going on? How do I sort it?



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Gray was a color Kohler used for "Service Engines"  The were not necessarily built to  customers specs and were used as replacements.

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The .003 piston is a "Factory" oversize piston they used for blocks that were bored on the high side of spec. 


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Yeah, whats been said on grey being a replacement engine - I got one, a 341 that was on a non running D160 and after cleaning up the fuel system it ran absolutely beautifully! The carb was beyond help with being gunked up, and, I did use one of those $15 carbs off ebay! (Ive used some 5-6 of them now) The drawback to these is the choke arm is wrong for the horses. But I switch them out, using the old carbs choke. And yes, those 2 teeny screws holding the butterfly almost always break, but I just drill them out and rethread them to 4-40 and use a button head screw.

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