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Kohler K341 Timing And Other Issues.

kohler k341 timing points

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39 replies to this topic

#16 NUTNDUN OFFLINE  

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Posted July 31, 2013 - 07:19 AM

I pulled the carb off and was checking it out again and the high speed needle tip isn't as sharp as I think it should be and it is bent a little bit. If you adjust the needle to the stock settings and look at it from the float side of the carb through the main jet it is against one side. I think that may be part of the problem I was experiencing with it being rich in the middle and sputtering sometimes. I don't think it is the cause of the backfiring and not wanting to get to full rpm.

 

I did do the valve clearances before I had put it all back together and I checked that again and they are still within spec. I am going to order a new main jet needle, along with a new head gasket and pull the valves and lap them. Hopefully this will get it running great again. It ran great after I had fixed the governor, for some reason though it just decided to act goofy now so maybe it is carbon keeping one of the valves open. 



#17 Texas Deere and Horse OFFLINE  

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Posted July 31, 2013 - 03:35 PM

The exhaust valve isn't sticking open a little when the engine is running by chance? 



#18 chris m OFFLINE  

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Posted July 31, 2013 - 04:42 PM

I may be off on this, but I am wondering the same as Brian. George can you spray something like WD-40 on the top of the vale(while closed) and see if it gets wet inside the exhaust port?



#19 DH1 ONLINE  

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Posted July 31, 2013 - 07:13 PM

Did something VIBRATE LOOSE electrical connection, ground wire?

You say it was fine and then all of a sudden started acting up maybe something came loose?

Causing inconsistent spark.

The engine mounting bolts on my MF16 vibrated loose on me.


Edited by DH1, July 31, 2013 - 07:14 PM.


#20 EricFromPa ONLINE  

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Posted August 03, 2013 - 12:40 PM

I had the ACR hang up on the cam on a K301 the other day.It was causing it to run hot and it would not run out above 1/2 throttle.I removed the cam cover and found that the ACR guide had somehow moved and jammed it up.I ended up pulling the cam and replacing it with a good used cam I had laying around.

 

I guess I could of pulled the guide and used Red loctite to secure it back into place.

 

 

A Loose points bracket or loose wire connection can cause problems.A bit of water laying in the float bowl will cause it to act up.Also a partly clogged high speed needle will make it act up.Those things are hard to get perfectly clean,apart from heat from a torch,it's darn near impossible to get every spec out of them.


Edited by EricFromPa, August 03, 2013 - 12:46 PM.

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#21 NUTNDUN OFFLINE  

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Posted August 19, 2013 - 06:54 PM

Now that the Olde Tyme Days show is over I pulled the engine out of the Bush Hog tonight. I took the cam cover off first because I wanted to see if the ACR was sitting right and it looks to me like it is. So then I pulled the head off and the valves could use a lapping but it doesn't look like either one is leaking enough to cause the issues I am having. I am going to pull the valves though and lap them and I am also debating pulling it apart again and removing the ACR from the cam. Since it is a regular starter I don't think it will have any issues turning the engine over.

 

So basically I still don't know what might be causing the problems. I am going to try and see if I can get the main jet out of the carb and replace it with a new one. That is the only piece that I haven't removed from the carb yet and that is because the slot to get the screwdriver in isn't the greatest.



#22 olcowhand ONLINE  

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Posted August 19, 2013 - 08:02 PM

If the ACR is in good shape, I don't think I'd take it out or disable it.  You'll have trouble getting it to turn over I'm afraid.  First widen the exhaust valve clearance to .006" WIDER than normal, then try cranking it over to see how much resistance there is.  Setting the exhaust this wide will disable the ACR so you can test.


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#23 DH1 ONLINE  

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Posted August 19, 2013 - 08:15 PM

 

 

All of that prior I had a straight pipe on the engine but I was tired of all the noise so I wanted to put the original muffler on since I was going to be working on it again. This muffler is the same one I had on when I had the Wisconsin in the tractor and that engine seemed very anemic in power.

 

 

 

I didn't notice these issues when I had the straight pipe on so I am wondering if the muffler could be causing these problems? Obviously if the muffler was clogged it would make it hard for the engine to run. I didn't think to look in to the muffler (not that I would have been able to see anything) before I put it on and welded it to the pipe. I might take a sharpened metal rod and poke a could holes in the baffle if I can. I would like to see what you guys think.

I re-read the whole thread and you replaced a 12hp engine with a 16hp engine using the same muffler.

You say it runs fine with straight pipe but acts up with the muffler on.

16hp needs a bigger higher flow muffler, 1-1/8" pipes inside diameter.

To small exhaust makes the engine heat up fast and changes the fuel mixture needed for it to run.

 

You have tried everything else, maybe time to up-size the exhaust, try it with straight pipe that has 1-1/8" minimum inside dia. including the elbows. Cheapest way to find out for sure.


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#24 NUTNDUN OFFLINE  

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Posted August 19, 2013 - 08:25 PM

I re-read the whole thread and you replaced a 12hp engine with a 16hp engine using the same muffler.

You say it runs fine with straight pipe but acts up with the muffler on.

16hp needs a bigger higher flow muffler, 1-1/8" pipes inside diameter.

To small exhaust makes the engine heat up fast and changes the fuel mixture needed for it to run.

 

You have tried everything else, maybe time to up-size the exhaust, try it with straight pipe that has 1-1/8" minimum inside dia. including the elbows. Cheapest way to find out for sure.

 

 

Since it has acted up I did remove the muffler and just ran the straight pipe just to make sure it wasn't the muffler and it didn't make a difference. 



#25 olcowhand ONLINE  

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Posted August 19, 2013 - 08:31 PM

Excorcism??


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#26 Texas Deere and Horse OFFLINE  

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Posted August 19, 2013 - 08:34 PM

I know what the problem is now.....

 

 

 

 

 

The HOG wants a DIESEL !! :thumbs:


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#27 IamSherwood OFFLINE  

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Posted August 19, 2013 - 08:38 PM

Maybe it's carrying again.

Has it been near any MF16s? :smilewink:


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#28 NUTNDUN OFFLINE  

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Posted August 19, 2013 - 08:39 PM

It would love a diesel and maybe at some point it will have one but for now it will have to settle for the 16hp Kohler.


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#29 Texas Deere and Horse OFFLINE  

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Posted August 19, 2013 - 10:03 PM

Maybe it's carrying again.

Has it been near any MF16s? :smilewink:

 

 

It;s still shacked up with that 1855 Bully of a Massey with a loader to help take advantage of it. Poor Thing !!

 

They are both snuggled up with that air compreesor also !! :poke:

 

:bigrofl: :bigrofl: :bigrofl: :bigrofl: :bigrofl: :bigrofl:


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#30 olcowhand ONLINE  

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Posted August 20, 2013 - 11:34 AM

It;s still shacked up with that 1855 Bully of a Massey with a loader to help take advantage of it. Poor Thing !!

 

They are both snuggled up with that air compreesor also !! :poke:

 

:bigrofl: :bigrofl: :bigrofl: :bigrofl: :bigrofl: :bigrofl:

 

 

What's an air compressor?   :bigrofl:


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