16hp kohler

[wheel horse puller9623 0]

ok i am still having problems with my wheel horse c165 i replaced the points coil and condenser and still did not have spark has good compression but no fire i am lost with what to do next can anyone please help me???????

[can whlvr 993]

check your safty switches,the seat will kill spark and i think the pto will too,make sure you have a proven spark plug,double check the points and gap,check all grounds too,but i would check out the safty switches,maybe bypass them if they are there just too see

[oldredrider 2,553]

Start with the basics...The 165 is a cradle motor; check to make SURE you have a good ground.

[rmaynard 15,747]

Being sure that you have the engine block properly grounded, run a wire directly from the (+) terminal of the battery to the (+) lug of the coil. If the engine runs, this rules out a bad coil, condenser or points. Do not leave the wire connected with the engine stopped as you could burn up the coil if the points are closed.

At this point, you need to work backwards from the coil to the ignition switch to find out where the (+) 12 volts is lost.

Do you have a wiring diagram?

[wheel horse puller9623 0]

Me and my dad went up today and rewired it and all switches are off and engine turn over but wont fire i hooked it up like my other one that runs fine but still wont fire anybody know what else is wrong??????

[rmaynard 15,747]

Again, I will ask, what happens if you hook a wire directly from the (+) terminal of the battery to the (+) terminal of the coil?

[rmaynard 15,747]

Here is the wiring diagram, STARTING circuit. The assumptions are that you are seated in the seat and the seat switch is closed. You have your foot on the clutch and the clutch safety switch is closed. The PTO is disengaged, meaning the PTO safety switch is closed. Also, we are assuming that the coil, points, and condenser are all good, and that the points are gapped correctly.

This allows you to turn the ignition switch from off to start. When the switch is turned to START, power is applied to the solenoid allowing the starter to turn, and power applied to the coil allowing the ignition to fire. When you let off the start switch and it returns to run, you are only applying power to the coil.

Now below is the same diagram, but with only the ignition portion highlighted in green.

The assumption now is that you have your foot off of the clutch, the PTO still disengaged, and you are sitting in the seat. However, because of the way it is wired, you can now get out of the seat and the engine will still run. That is because the safety circuit is running through the closed PTO switch. However, if you were to engage the PTO while off the seat, the circuit to the coil would be broken and the engine would stop. Likewise, if you were in the seat with the PTO engaged, and stood up of fell off the seat, the engine would stop.

So in conclusion, if you know that the coil, condenser and points are good, to find out why the starter will work but you don't have spark, do the following test. With the ignition switch in the ON (run) position, you know that you have 12 volts there, so with a meter or a test light, trace the green line from Battery position "B" on the switch, all the way to the coil. Somewhere along that path you will find a break in the circuit.

[wheel horse puller9623 0]

Thank you bob i went up today and did what u said and i got spark now what does that mean i am missing?

[rmaynard 15,747]

Look at the wiring diagram above. The green line from the coil to the ignition switch is probably where the fault lies.

Start at the ignition switch though. Make sure that the tabs on the back of the switch, as well as the contact surfaces of the 5-pin plug are clean and not rusty or corroded. If you have a meter, put it on the DC scale in a range high enough to read 12 volts. Take the black probe and attach it to ground, and with the switch turned to RUN, stick the probe into the back of the 5-pin plug in the position that corresponds to IGNITION.

The picture below depicts the back of the plug where the wires come out.

If you have 12 volts there, then check at where that wire connects to the PTO interlock switch.

Keep following the GREEN line as drawn on my diagram. Somewhere along the way, you will lose your 12 volts.

If you don't have a meter, you can use an automotive tester with a 12 volt light bulb.