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Engine will not start


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#1 kilzok OFFLINE  

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Posted November 10, 2016 - 02:40 PM

Hello everyone, I have an older Craftsman lawn tractor with a Kohler 14.5 h.p. engine that some times will not start.  I have had the battery tested and its o.k. The tractor has a new starter and solenoid. When I turn the key the starter grunts but will not spin the motor. I removed the spark plug and the motor spun well. Nothing was ejected from the plug hole. After replacing the plug the motor started right up. I would be grateful for any ideas as I love this old machine.


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#2 Bolens 1000 OFFLINE  

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Posted November 10, 2016 - 02:43 PM

So are you saying the motor has trouble spinning over while under compression?

If you are sure your solenoid and starter are in good order I would maybe take a look at your valve clearances


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#3 Merle013 OFFLINE  

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Posted November 10, 2016 - 04:17 PM

I have had an issue with a couple of B&S engines needing the valves adjusted. They were doing the same thing. I had one that I would leave the hood off so I could start it. Had to use my hand to help the engine turn once. After that it was fine.


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#4 kilzok OFFLINE  

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Posted November 10, 2016 - 05:03 PM

Thanks fellows. I ll look into the valve issues. This certainly is a strange one to me. Its almost like the engine is siezed until I remove the plug. 


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#5 Bolens 1000 OFFLINE  

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Posted November 10, 2016 - 05:29 PM

Alot of these newer OHV engines will need routing valve adjusting after X amount of hours.

 

If you need any parts along the way I should have the gaskets and such instock


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#6 stiemmy OFFLINE  

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Posted November 10, 2016 - 05:34 PM

Bad starter wiring connections will do this, worn starter bushings, or a bad spot on the starter comm can cause a weak starter, but once spinning will work.

A load test on starter will tell you if its starter related or not.

Sometimes using a battery charger to increase the voltage will make the starter spin faster too. Not a sure fire way of testing the starter at home, but sometimes it works;)

Edited by stiemmy, November 10, 2016 - 05:42 PM.

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#7 Doxey OFFLINE  

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Posted November 10, 2016 - 08:35 PM

Almost of all my starter problems were bad grounds, mainly battery to ground.


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#8 JBRamsey OFFLINE  

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Posted November 10, 2016 - 09:01 PM

When you pulled the plug, you relieved the compression.

You have to set valve lash on the overhead valve engines. Friend of mine thought his starter was bad. Bought a new one same problem. Local small engine shop told him to adjust the valves. Problem solved. When the starter starts to labor, he adjusts them.
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#9 EricFromPa ONLINE  

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Posted November 10, 2016 - 09:53 PM

There is No Valve lash on a vertical shaft OHV kohler command.It has hydraulic lifters so all you have to do it set the Preload which Kohler states is 100 inch lbs. for both rocker bolts.

 

 

You might have a lifter going bad or a bent push rod.

Are you sure it's an OHV Kohler and not a OHV Briggs?The early Briggs Vanguards looked similar to the Kohlers.

 

Post a pic of your engine if you can or give us the model numbers on the engine that will help alot.

 

 

Briggs on left Kohler on right.

 

 

28P777-0641-A1.JPG   s-l1600.jpg


Edited by EricFromPa, November 10, 2016 - 10:58 PM.

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#10 secondtry ONLINE  

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Posted November 11, 2016 - 03:03 AM

   The problem with the brigs is if the valves get loose the automatic compression release no longer works. That fact has sold a lot of unneeded starters. I imagine Kohler has a compression release also but I know nothing about it. Don   


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