OT SMALL ENGINE ELECTRICAL

Morning,
i need help on my kohler engine.
Its in a case skidloader not sure what size
engine but its big.
anyway it ran ok when we got it but smoked out the muffler like it was not running well.
It started to flood out on me several times.
Now when it starts it runs like it is running on
1 cylinder ( it is only 1) but wont rev up and floods out the carb.
I checked power with my test light and it has good power to the resistor about half as much comming out (like it should )?
has power to batt side of coil .
no power to other side of coil. but I didnt have help to turn it over to see if i did when it was cranking. I got the idea may be the coil or condenser could be bad the points are supposed to be new .
anybody got some ideas what could be wrong it worked ok till this started.
thanks
Harry

Harry - I kinda doubt the problem is electrical. 12 volts at the high side of the resistor, about half that at the low side of the resistor and battery side of the coil, and 0 volts at the other coil primary terminal is normal with the engine stopped the breaker points closed. (If the points are open you should see 12 volts at all 3 places.)

Rather it sounds like you're dealing with a carburetor problem. Here's what I'd do:

1 - Make sure the breaker points (under the rectangular "tin can" on the side of the block) are clean and are properly gapped (0.020")

2 - Thoroughly clean the spark plug. Or better yet replace it with a new one. Before replacing the plug, connect it to the coil wire then crank the engine. You should see a fat, blue spark at the plug gap.

3 - Drop the bowl on the carburetor and clean it out. Check that the float moves freely and that the float needle shuts off fuel flow when the float is held up with LIGHT finger pressure.

4 - Replace the carb bowl. Now turn both the idle and power mixture adjusting needles in to their seats (gently!) then open each up 1 full turn.

That should get the engine running again. Then after the engine warms adjust the idle mixture screw for the smoothest slow idle, then the high speed screw for the best running/power at full speed.

1st thing, you need 12vdc at the positive side of the coil, don't know why you would have a resistor in a Kohler engine. They are not required.
Do you have a plug wire that is wire cored and not a car plug wire?
you should have 12vdc at the neg side of coil every time the points close. You need a VOA meter to test it correctly, not a test light.
Jim

(quoted from post at 18:44:31 07/07/08) 1st thing, you need 12vdc at the positive side of the coil, don't know why you would have a resistor in a Kohler engine. They are not required.
Do you have a plug wire that is wire cored and not a car plug wire?
you should have 12vdc at the neg side of coil every time the points close. You need a VOA meter to test it correctly, not a test light.
Jim

Click to expand...

The voltage on the points side of the coil should drop to near zero volts when the points close. When they open you should get battery voltage,