kohler magnum 12hp

[carlejoyce 0]

Just installed new starter, new carb, replaced valve guides. lapped ad adjusted the valves.  Engine is running like a top but when load is applied I experience a power loss to the point the engine will stall.  Any ideas to solve problem???

[Handy Don 12,444]

1 minute ago, carlejoyce said:

Just installed new starter, new carb, replaced valve guides. lapped ad adjusted the valves.  Engine is running like a top but when load is applied I experience a power loss to the point the engine will stall.  Any ideas to solve problem???

Might be courteous to introduce yourself before plunging into questions. Add to that a read of the forum rules and scan some old posts to get a feel for the place.

Also, since there are hundreds of WH models, it'd be very useful if you share the year, model number, and serial number of your tractor and the engine model if it isn't original to the tractor.

 

And, by the way, welcome to the forum! 

 

[Snoopy11 5,714]

Hmm... well, that could be a variety of things... 

 

What was going on before you did all the valve work... were you having the same problem? I'm just curious to know what the engine was like before you did the work. Sounds a little like maladjusted valves... but... I don't know that because...  as @Handy Don said... I have no idea what you have done, etc... etc...

 

 

 

Don

Edited November 10, 2021 by Snoopy11

[Achto 27,747]

53 minutes ago, carlejoyce said:

Engine is running like a top but when load is applied I experience a power loss to the point the engine will stall.  Any ideas to solve problem???

 

 

Is the throttle trying to open when you put load on the engine? If not, maybe you have governor issues.

[roadapples 6,983]

[kpinnc 12,367]

My question is what do you mean "load applied"? Are you engaging the PTO, or what?

 

 

[953 nut 55,744]

When you add a load by engaging the PTO your seat switch must be activated by someone being in the seat or the ignition will be interrupted.

[Maxwell-8 4,289]

13 hours ago, carlejoyce said:

replaced valve guides.

Did you had the engine open?

[peter lena 8,719]

@  carlejoyce , agree with 953 nut , on possible seat switch issue , you are lucky in the way that a related function is causing a problem , could be a simple test wire check out , often use small alligator clip  wire jumpers to find and correct issues . think about it , you can make it fail  with a lever , pete