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10-26-2015, 09:27 PM | #1 |
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Not Model A- Kohler engine trouble
Have a 12HP Kohler engine on a Gravely walk behind tractor. Starts and runs very rough spiting raw gas out of choke orfice. Carb has been serviced. The tractor has been sitting for several years (5-6?). Would a poorly seating valve cause this. Any and all help will be appreciated.
Sewall |
10-26-2015, 09:44 PM | #2 |
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Re: Not Model A- Kohler engine trouble
Yes, do a compression test.
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10-26-2015, 10:06 PM | #3 |
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Re: Not Model A- Kohler engine trouble
An intake valve that is hanging up can allow gas to spit out carb-also make sure carb. needle and seat is working properly-if not the carb will overflow and excess fuel can end up in combustion chamber or even in sump oil. Some Kohlers have a mechanical compression release that holds one valve open momentarily to ease pull starting
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10-26-2015, 10:49 PM | #4 |
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Re: Not Model A- Kohler engine trouble
my first thought was stuck needle causing extreme rich condition. Is the plug wet with fuel? Hows the oil look/smell?
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10-27-2015, 03:12 AM | #5 |
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Re: Not Model A- Kohler engine trouble
Try some Sea Foam mixed with fresh gas without ethanol. I only use good gas without the corn crap in all my old cars and small engines.
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10-27-2015, 06:52 AM | #6 |
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Re: Not Model A- Kohler engine trouble
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10-27-2015, 06:57 AM | #7 |
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Re: Not Model A- Kohler engine trouble
i would start with what Tom mentioned... run sea foam through it
i have done this numerous times and it helped free things up.. i have to mix it with corn crap as straight fuel is not available near me.... |
10-27-2015, 08:18 AM | #8 |
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Re: Not Model A- Kohler engine trouble
Is there any one brand of gas that does not contain ethanol?
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10-27-2015, 08:24 AM | #9 |
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Re: Not Model A- Kohler engine trouble
no, usually premium or midgrade does but you would have to check which stations do this.
honestly ive never had issues using ethonal gas as that's all we had for the last 25+ years in my area. I never do anything special either (most of it sits in the mowers all winter with whatever was left in it) start up just fine in the spring. i notice the lawnmower shops are gouging people selling non ethonal gas in a half gallon can for $8.00...
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10-27-2015, 09:22 AM | #10 |
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Re: Not Model A- Kohler engine trouble
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10-27-2015, 12:42 PM | #11 |
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Re: Not Model A- Kohler engine trouble
I'm going to guess yours is a K301. I'd suspect the carb is your problem. If not the needle and seat, then I would pull the float and see if it will float evenly in a container of water.
Below is a link to the service manual. PM me if you need help. I play with these single cylinder Kohlers a lot; mostly K321 and K341. I have a few carbs and parts. http://www.kohlerengines.com/onlinec...1346_c_all.pdf |
10-27-2015, 03:45 PM | #12 |
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Re: Not Model A- Kohler engine trouble
Previous post had link to operator's manual.
Here's the link to the service manual. http://gravelymanuals.com/pdf/Kohler...v_Man_0472.pdf |
10-27-2015, 07:55 PM | #13 |
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Re: Not Model A- Kohler engine trouble
Shell Premium has no Ethanol. If it's in your area. (Or Country!!)
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10-27-2015, 09:42 PM | #14 |
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Re: Not Model A- Kohler engine trouble
Well I really want to thank everyone for your replies. I was only able to do a compression test today and it was right at 130PSI. I don't know what it should be but sure is better than my A I will do some more tinkering and let y'all know what happens.
I'll get some good gas tomorrow and Sea Foam and see if that helps. Sewall |
10-28-2015, 10:14 AM | #15 |
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Re: Not Model A- Kohler engine trouble
The link provided is a great place to ask about this kind of engine and tractor questions;
http://www.smokstak.com/ Steam gas diesel big small etc |
10-28-2015, 10:37 AM | #16 | |
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Re: Not Model A- Kohler engine trouble
Quote:
run! I put a new set of points in it and acted as you discribed in your first post. Timing is VERY crittical on the Kohler !....so I used my mag buzzer.. Dudley |
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10-28-2015, 10:43 AM | #17 |
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Re: Not Model A- Kohler engine trouble
What's a mag buzzer?
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10-28-2015, 02:14 PM | #18 |
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Re: Not Model A- Kohler engine trouble
It's an audibule tool that DOESN'T run current threw a magnetto. I also use it
on regular ignition systems, insteed of a test light.. |
10-28-2015, 03:15 PM | #19 |
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Re: Not Model A- Kohler engine trouble
I used to have a Gravely. It was a beast that could chew through CT brush to expand our yard into a previously wooded areas. With a very large and DANGEROUS circular saw blade replacing the cutting deck we could trim stumps flush with the ground. A fun machine well worth fixing.
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10-29-2015, 08:06 PM | #20 |
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Re: Not Model A- Kohler engine trouble
Well, I got her done! Followed a lot of advice from y'all and locally and my Gravely is running good. I put a little oil in the spark plug hole and turned the engine over a few times. Then followed Tom's suggestion with good gas and Sea Foam. Installed a new bowl gasket. Don't know which worked the best (maybe all) but is now running good.
Thanks again for everyone for your help and ideas. Sewall |
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