[fltcrew21]

A little over a month ago on a 100 degree south Ga Sunday afternoon, my 140 got hot and blew a head gasket. I believe I brought this on myself by putting some Mystery Oil in with the SAE 30.

Anyway, I limped the tractor back to the garage and as I was about to shut it off, the rpm increased and free spooled then died.

I coach middle school football and that season just ended so I now have time to work on it.

The engine is drained and removed and I am about to get into it for the first time by myself.

This is a pretty straight forward engine to work on isn't it? Am I likely to find a broken rod?

I have a complete K321 gasket set on hand.

I can't read the engine serial number off the sticker anymore. Where can I get the info I need to assure I am ordering the correct parts? I know they have a lot of spec #s.

Thanks

 

[mikeduwe]

Get ahold of the 140 service manual or a Kohler Kseries manual. They are pretty easy to work on.

You might find a stuck exhaust valve or blown head gasket and or warped head. Maybe bad rod.

Make sure your head is flat by running over sandpaper on a panel of glass. And retorque the head bolts after you run it once.

 

[david_a_calkins]

Alan .first pull the head ,rotate the crank ,see if the rod is broke ,and go from their ,the service manual is SM2105[OCT-81 and the parts manual is PC1473 [AUG-89 also there is a Kohler engine manual ,that will have the same info in it .hope this helps .David

 

[drew]

The manuals you need are available on www.wfmfiles.com The Kohler manuals are there. Also download the Kohler Guide to Engine Rebuilding.

Many of the parts for the K series are interchangeable. If you are buying parts for a K321 you should be OK. Make sure the connecting rod matches the piston, if you need one. There's an old style and a new style.

I buy many parts from Pat's Small Engines out of MN. They've been good to work with and have good parts pages online.

Mike

 

[fltcrew21]

OK, dad and I got into the 321 this afternoon and the rod is shattered.

Number on the side reads 2 47 059 04. Does this tell me anything about whether it is the older or newer rod?
I have seen them forsake on eBay and some have a leading "1" and some a "2" like mine.

Thanks

 

[david_a_calkins]

Alan ,i went through my kohler manual and the rod you have don,t match either number you have ,could be a after market rod .you didn,t say if it was a stock bore ,you never know what was in the past of this engine ,David

 

[drew]

Does the piston have a full skirt? That would be the old style. The new style has a recessed skirt.

The number on the rod may be a casting number and not the actual part number.

Is there anything stamped on the top of the piston, like STD, .10, .20?

If all else fails you can have a small engine machine shop measure the crank to see if the rod was standard or oversized because the crank had been previously ground down. They will compare the measurement to get the correct rod.

 

[fltcrew21]

Thanks for the replies. I got online help from OPEEngines.com out of the Pacific NW.

As previously reported, they are very knowledgable and resourceful in finding answers.

I have the standard piston and standard rod with the long dipper.

The part number was CONNECTING ROD STD 4706709

It should be here in a couple of days and I hope to get my baby back together next week!

 

[fltcrew21]

Installed the new rod and it purrs like a kitten again. I wanted to show it back in action with the 80 cart I restored in June. This is the first official job for the cart besides hauling my 8yo daughter and her dog.