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Author Topic: Got bit by the Kohler bug...  (Read 1659 times)

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Offline dgdrls

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Re: Got bit by the Kohler bug...
« Reply #20 on: June 13, 2020, 07:34:53 PM »
Got bit by same bug on the 25 hp kawasaki on my mill. Would you believe ethanol gas. Not the ethanol itself but the water that usually goes along with it. Most small engines have no valve guides, just a hole drilled through the aluminum head. Aluminum head, steel valve stem plus water and let it sit for a week or so. Corrosion equals a valve stuck in the head. When you crank the engine, the weakest piece in the valve train breaks. bent broke push rod, bent rocker arm, bent valve or worst case a cracked head. We both lucked out
Great info pineywoods,  I can believe that.   Non ethanol fuel is key or add ethanol treatment to "regular" fuel.
I add a shot of synthetic premix oil to my small engine fuel to make it a little more slippery as well.
D

Offline Ben Cut-wright

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Re: Got bit by the Kohler bug...
« Reply #21 on: June 14, 2020, 04:07:03 PM »

I now have a crankshaft position error no signal fault code 0337.  ::)
What was determined to be the cause of the CPS fault code? 

Offline cobbr68

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Re: Got bit by the Kohler bug...
« Reply #22 on: June 14, 2020, 10:37:23 PM »
I did use 5W-30 instead of 10W.  And I dont think it was synthetic blend.  The Kohler specialist said that the Kohler brand is 10W synthetic blend.   Note to self for next time...

Also, I did use non-ethanol.  I dont usually use that in 4 cycle engines but I happened to this time.  Not sure if either of those details contributed to this issue.  

The mill is running fine now...finishing up a custom milling job on some white oak.  Thankfully, the customer has been patient.  
Incremental improvement is better than postponed perfection.

Offline cobbr68

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Re: Got bit by the Kohler bug...
« Reply #23 on: June 14, 2020, 10:40:18 PM »
 Ben,

Great question on the 0337 fault code.  I cant remember his explanation. Ill ask again and post it. 

Rick
Incremental improvement is better than postponed perfection.

Offline Ben Cut-wright

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Re: Got bit by the Kohler bug...
« Reply #24 on: June 15, 2020, 10:05:58 AM »
I did use 5W-30 instead of 10W.  And I dont think it was synthetic blend.  The Kohler specialist said that the Kohler brand is 10W synthetic blend.   Note to self for next time...

Also, I did use non-ethanol.  I dont usually use that in 4 cycle engines but I happened to this time.  Not sure if either of those details contributed to this issue.  

The mill is running fine now...finishing up a custom milling job on some white oak.  Thankfully, the customer has been patient.  
Your initial post stated you "have about 160 hours on the mill and decided I should change the oil".  Was this the FIRST oil change ever for this engine? 
I don't think the lower viscosity oil you selected for the oil change would have caused the damage immediately after the oil change.  Oils with lower API  service ratings than Kohler recommends can cause rapid damage.   10W-30 is the viscosity range most suited for your location.  Just as important is the use of "API service SJ" or better oils. 
Not sure what you meant by "don't usually use non-ethanol fuel in 4 cycle engines".  Did you *happen to use non-ethanol in this Kohler when the problem arose?  Did you *happen to use non-ethanol in the Kohler all along?  Non-ethanol would be the better choice and using it should not have caused the current problem.
What did the tech say about 'cause and effect'?  Was he satisfied the failure was simply a failed push rod?  Did he recommend changing the oil you put in the engine?


Glad you got it running fine now. 

Offline POSTON WIDEHEAD

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Re: Got bit by the Kohler bug...
« Reply #25 on: June 15, 2020, 06:44:51 PM »
The Kohler 26 hp EFI engine is one of the greatest mysteries on this earth.  ;D
The older I get I wish my body could Re-Gen.

Offline Southside

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Re: Got bit by the Kohler bug...
« Reply #26 on: June 15, 2020, 08:50:08 PM »
Good to hear from you goat!!  
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Offline POSTON WIDEHEAD

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Re: Got bit by the Kohler bug...
« Reply #27 on: June 15, 2020, 09:04:55 PM »
 ;D
The older I get I wish my body could Re-Gen.

Offline barbender

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Re: Got bit by the Kohler bug...
« Reply #28 on: June 15, 2020, 09:16:11 PM »
Haven't heard from that goat in forever, but he must've got wind of a Kohler floundering and had to come head butt it😂
Too many irons in the fire

Offline cobbr68

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Re: Got bit by the Kohler bug...
« Reply #29 on: June 17, 2020, 06:30:02 PM »
Ben,

I bought the mill with 30 hours on it. Dont know if the previous owner changed the oil in that time frame.  This is the first time I changed it. 

I usually use 87 octane.  However, this time I used non-ethanol.    To remove bad gas as the potential culprit, I removed and replaced the gas but had the same result (not knowing at the time that the rod was broken)

The mechanic texted me this explanation:

Hi. It just goes off when the engine doesnt run after a few turns not an issue it just thinks the engine isnt turning because it doesnt get a reading at low rpm. Nothing to do with the push rod issue. 

Rick
Incremental improvement is better than postponed perfection.

Offline cobbr68

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Re: Got bit by the Kohler bug...
« Reply #30 on: June 17, 2020, 06:36:56 PM »
Poston,

Speaking of mysteries, why do they call you goat?


Rick
Incremental improvement is better than postponed perfection.

Offline SawyerTed

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Re: Got bit by the Kohler bug...
« Reply #31 on: June 17, 2020, 06:48:35 PM »
The Kohler 26 hp EFI engine is one of the greatest mysteries on this earth.  ;D
Other great mysteries - women and trailer lights.   I have a Kohler EFI on another piece of equipment.  Unlike women and very much like trailer lights it is an exasperating engine.
Woodmizer LT35HD25, WM BMS 250, WM BMT 250, Kubota MX5100, IH McCormick Farmall 140, Husqvarna 372XP, Husqvarna 455 Rancher, Ram 3500 6.7 Cummins

Offline Southside

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Re: Got bit by the Kohler bug...
« Reply #32 on: June 17, 2020, 09:17:44 PM »
A even bigger question is what is the origin of the SGU and the nickname "Posthole"  :D
Franklin buncher and skidder
JD Processor
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Offline POSTON WIDEHEAD

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Re: Got bit by the Kohler bug...
« Reply #33 on: June 17, 2020, 10:31:51 PM »
YAWN.......going to get back in my pen. :)
The older I get I wish my body could Re-Gen.

Offline Ben Cut-wright

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Re: Got bit by the Kohler bug...
« Reply #34 on: June 18, 2020, 09:11:29 AM »
Ben,

I bought the mill with 30 hours on it. Dont know if the previous owner changed the oil in that time frame.  This is the first time I changed it.

I usually use 87 octane.  However, this time I used non-ethanol.    To remove bad gas as the potential culprit, I removed and replaced the gas but had the same result (not knowing at the time that the rod was broken)

The mechanic texted me this explanation:

Hi. It just goes off when the engine doesnt run after a few turns not an issue it just thinks the engine isnt turning because it doesnt get a reading at low rpm. Nothing to do with the push rod issue.

Rick
Thank you very much for the info cobbr68.

Machinery failures are prone to repeat without a clear understanding of 'cause and effect'.  That broken push rod may have simply been faulty.  Kohler OHV engines have had a history of valve train failures.   Since this may very well have been the first oil change, and the fault showed up directly after that oil change, and using the correct oil in a Kohler engine is essential, and none of the other maintenance items you preformed would cause this sort of problem,  I was focused on improper oil as a likely cause. 

Sure hope you don't take me as argumentative when I say,  modern crankshaft sensors are quite sensitive, they read accurately at very low cranking speeds up to very high RPM's.  That said, extended cranking resulting in no-start can set CPS codes.  So, the busted push rod preventing quick starts and no-starts might actually have had some indirect effect on the code.


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