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Mf 14 Help!


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#1 LYON222 OFFLINE  

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Posted January 05, 2014 - 12:59 PM

Having problems while running the 14. Runs great while cold but will not take a load or rev very well when it gets hot. It coughs and spit and sputters and will stall if it is not brought back to idle. I can get it to rev to a high rpm if I bring it up very slowly. Need help on This one. Any thoughts? And thanks in advance

Edited by LYON222, January 05, 2014 - 01:23 PM.

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#2 DH1 OFFLINE  

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Posted January 05, 2014 - 04:05 PM

Try the fuel mixture, hi-speed jet, adjust a bit both ways.

Check make sure Fuel is good, no water in it.


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#3 LYON222 OFFLINE  

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Posted January 05, 2014 - 05:04 PM

I will try that. No so sure it's a carb issue. It dosent just run rough it really shakes and will start to exhaust out of the air cleaner. I'll try to get a video up later

#4 HowardsMF155 OFFLINE  

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Posted January 05, 2014 - 06:55 PM

I think that is a Kohler?  You may have ignition issues rather than fuel issues.  Drain the tank, install a fuel filter, put in fresh fuel treated with something like Seafoam or Stabil, then do an ignition tune-up, new points, condenser, plug and check gap.  While you are doing that, might as well check the valve lash too.  That will cover the general maintenance items.

 

Beyond that, Kohler coils can break down when hot.  Again, that appears to be a fuel related issue with all the sputtering, backfires, gas out the carb etc.  If general tune-up items don't fix it, try a new coil.


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#5 IamSherwood OFFLINE  

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Posted January 05, 2014 - 07:05 PM

Has it been sitting for a while? Have mice partially plugged the exhaust?


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#6 trowel OFFLINE  

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Posted January 05, 2014 - 07:31 PM

I second the coil being bad, but first check the carb, adjustments, cleaning, gasket and intake manifold to block gasket.


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#7 LYON222 OFFLINE  

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Posted January 05, 2014 - 09:28 PM

No it Hasent been sitting. Brand new plug, plug wire, condenser, and coil. Has ran fine for many year before this. Thanks for all the advice

#8 DH1 OFFLINE  

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Posted January 05, 2014 - 09:31 PM

Another thing that might of happened as it happened to me is something vibrated loose.

Wire connection somewhere, these engines shake a lot and in my case the ground wire came loose.

Caused erratic running.


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#9 LYON222 OFFLINE  

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Posted January 05, 2014 - 10:35 PM

I guess I have a lot if little things to check. I'll try to get Video up tomorrow and see what I can find
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#10 101 senior ONLINE  

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Posted January 11, 2014 - 06:58 AM

Sometimes the new points need a little filing . Try that and check to make sure the gap is correct. If that doesn't do the trick, It could be your new condenser. Hook up your old one and see if there's a change.


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#11 chad zehr OFFLINE  

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Posted January 21, 2014 - 09:26 PM

I second 101 senior! Double check your points gap and try putting back on your old condenser and see how she runs. Also make sure the charging system is working properly. I had a k321s motor that had a loose connection between the regulator and battery that wreaked havoc on the points for some odd reason. With the points cover removed they would spark violently when the rpms were raised causing the engine to run poorly. Just make sure all the connections are good and tight.


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#12 LYON222 OFFLINE  

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Posted January 22, 2014 - 08:07 PM

Sorry it's been awhile but this link SHOULD work Thanks for all the help everyone!

Edited by LYON222, January 22, 2014 - 08:13 PM.


#13 MH81 OFFLINE  

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Posted January 22, 2014 - 08:26 PM

Wow, your timing has got to be off somehow or you have a sticky valve.

What all have you changed on this? Points, coil, plug, etc.

Have you checked to make sure the points plunger isn't sticking?
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#14 LYON222 OFFLINE  

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Posted January 22, 2014 - 08:31 PM

I'm leaning more toward exhaust valve sticking. I haven't messed with points yet but it has new plug, plug wire, cool and condenser. And it ONLY does this after it gets hot. The first 10 min it runs like a dream.

Edited by LYON222, January 22, 2014 - 08:32 PM.


#15 IamSherwood OFFLINE  

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Posted January 22, 2014 - 08:38 PM

It almost sounds like it's sucking ALOT of air.

Could it be that after 10 minutes, the carb is warmed up enough to open up a

crack in it? If that makes sense, try spraying quick start at/around the carb, as you

open the throttle.


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