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By RJ Hamner
I was breaking down the engine getting it ready to go to the machine shop. Everything was pretty normal until it tried to remove the PTO race and the engine pulley. As I was setting up the "puller" I noticed the end of the crankshaft looked different but never gave it much thought. After a half a can of PB Blaster,destroying the engine pulley and turning the air in the shop blue I was able to get the crankshaft free. There was a LOT of baked on crud and grease and I thought that was the problem. Cleaned everything up and found the race would not slide on the crankshaft??? Got out the measuring tools and found the answer. The end of the crankshaft was expanded will past the 1.125".
I had another crankshaft so I looked at the PTO end. It almost looks like someone bored the end and inserted some kind of tapered shaft and/or beat the heck out of the end and swelled the last 1/2"-3/4" of the crankshaft.
Can anyone think of a reason???
I have a K341 that gave up a rod a while back. talk about "Big Bang Theory..." anyway, I tore it down to see how bad it got inside and to my surprise other than the rod, and the very bottom of the piston skirts the inside looks great!
the crankpin looked like it might have taken some abuse but i used a white stone (lightly) and some polishing paper and it must have been debris from the rod or piston because it came right off.
i took some measurements and it does show some wear. the crankpin measures 1.498 to 1.499 (low limit is 1.499) and out of round a full .001 (spec calls for .0005 max)
the bore measures .002 out of the wear limits and is out of round about .005. going to need a new piston anyway and i can bore it at work . no problem there.
my question is, would you re-use the crank in that condition? I can't grind a crank at work... lol
Got the new Chinese carb on my k341 and I'm still having issues with it. When I open the throttle all the way with it not running everything opens as should but when it's running the throttle shaft on the carb only opens half way. As in the governer isn't functioning correctly or a spring is warn. It surges terribly and almost dies when you drive it. Definitely frustrating!!! Here's a video of it running.
Has anyone ever used one of these replacement Kohler carbs from Amazon? Went ahead and ordered one for my 16 HP K341. The throttle shaft on the old one has so much play that I'm surprised the thing even runs at all. I've heard plenty of good reviews and also plenty of jeers claiming they are cheap and don't work as well. Looks like an exact copy of the Kohler carb. I guess we'll see for certain tomorrow when I get it put on...