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Okay this is going to be a bit of a long reply but before you go wasting a bunch of time with a lot of tests that may or may not be needed, waste a little time here reading. First, do as Bert mentioned. If you can find a way to do it, gravity feed fuel directly to the carburetor from an...

Yeah they're not all the same. On the Kohler OEM pumps there is an arrow showing the direction of the fuel flow. Not all aftermarket ones have the arrow. One flows right to left and the other flows left to right. I don't remember exactly why they had the different directions but I think it had...

At this point I don't believe you can hurt anything by running it but if that upper bearing is indeed galled it will most likely seize again. But who knows? It might run fine for a long time. I have also seen some 7000 series engines wear the upper main to the point of the hole being oval and...

I'm guessing here but it's a guess from experience. The engine more than likely seized at that flywheel side bearing and some galling there is keeping the crankshaft from coming out. If that's the case the block is toast and there is no fixing that. I had some guys that were able to take a small...

After it dies will it start right back up?

I've dealt with quite a few Kohler engines that had been driven into lakes and ponds and I've never seen one bent connecting rod let alone two. That's really bizarre to me. The ones I really loved were the people who wanted warranty on the engine because they drove the equipment into the water...

The hours you put on your unit in 20 years would probably be about the average number of hours a commercial cutter puts on in one year. Less in the northern states and more in the southern states but 600 hours would be a pretty fair average. These guys are spending $8000 to $12000 for a piece of...

I did spend the better part of 27 years giving factory Kohler training to Kohler dealers but I don't think there was a class I taught that I didn't learn something from a tech in attendance. The troubling thing is that after being retired for just 18 months, stuff that used to just come off the...

If you squeeze it with your thumb and forefinger your usually can feel where it's just hose. The restrictor might even show up as a bump in the hose and is brass so it won't crush all that easily. If you squeeze the hose with a needle nose slowly you'll know if you hit it. I think squeezing off...

Well, we can’t all know everything which is what is nice about forums with a lot of members. If you do find pinching off that hose stops the rich running here is the part Kohler part number for the mysterious accelerator pump kit. 24 757 21-S KIT, ACC PUMP W/GASKETS This...

On the side of the carb do you see one or two small rubber tubes going to a cover plate held on by 3 screws? That's the accelerator pump cover. Carefully pinch off one of those tubes. I say carefully because there is a metal restrictor in one of them and you don't want to crush it when you pinch...

All the Command twins from 18 to 28 HP use the same governor gear which is part number 24 043 12-S. And to expand a bit on what chipg posted. For engines with a compression release, the leak down test is really the best test and many engines do use a compression release. For your engine a...

You'll find the engine model and spec number laser etched in the engine block just behind the fuel tank mounting bracket. The best way to get the part number for a replacement carb is to go by the number on the original carb which should be 14 053 and two more digits. Say you look at your...

An engine that was completely worn out, meaning it would need bored, oversized pistons, undersized rods, valve guides reamed and oversized valves and probably a new carb would definitely not be worth rebuilding. I would add that depending on how the engine is cared for and maintained and...

Unplug the stator and check for continuity at the diode in the charging lead at the stator. You may have to peel back some heat shrink to get to it. Put the red lead of your meter on one side of the diode and the black lead of your meter on the other side and check for continuity. Then reverse...

No

I don't know if you're still struggling with this or not but it sounds like you've determined you have an unregulated dual circuit system. If that is the case then it is working as designed and you're trying to fix something that isn't broken. The only thing that will cause over charging in a...

When you say you bypassed the carb shutoff are you meaning the solenoid on the carb?

At this point. Yes they are.

LOL...save your fingers. It's a lost cause.

I do. Do you? True Not true. Somewhat true. Not true. Sorry, but ILENGINE is 100% correct. Your response was however, quite entertaining.

Something I meant to mention in my previous post is, if you think the solenoid isn't working, before you condemn or even remove it make sure you are getting power to it and it's got a good ground. If you had a lamp in your living room that wouldn't work, putting a new light bulb in it won't...

Umm, I'm no electrical engineer and maybe I'm misreading this but won't directly grounding a power wire do nothing but create a short circuit and blow the fuse? Hopefully? And if they've messed with wiring and for some silly reason bypassed the fuse this could be a good recipe for a fire.

Green on Kohler goes to the oil pressure switch.

Although not directly mentioned, doing the voltage tests I recommended would check both the solenoid and the key switch or at least could lead toward the key switch or possibly a lack of voltage getting to the key switch.

I would check for voltage drop and or a ground issue to start. It only takes a couple of minutes once you have your voltmeter in hand. MTD uses fairly small gauge battery and ground cables and they have been know to cause issues especially when coupled with this engine. I posted the procedure I...

Asked and answered but I'm bored so 177th day of 2012 FWIW

This may be like starting over but take a few minutes and do a couple of simple voltage checks. With the key in the off position start by taking a voltage reading I call “Across The Battery”. Black lead on the negative battery terminal and red lead on positive terminal. Duh, right? This will...

You can if the ignition coil is outside the flywheel. If the ignition coil is under the flywheel then no.

Maybe a bit late to this party on this one but, try cranking the engine with the spark plugs in and the spark plug wires off. You'll still be cranking under full compression but it will take the ignition out of the equation. If it cranks fine with the plug wires removed, your starter and the...

The reason I asked is, if the lifter was out of the lifter galley when you removed it, it probably caused a burr that will need to be removed before you can get it back in. If you took it right out of it's galley there shouldn't be a burr. They normally aren't too difficult to install. Are you...

Can you give a little history on why the lifter is out? Humor me for a minute. It's a legit question.

I too am curious what the dealer finds. And something that just hit me. It was already at the dealer so it wouldn't have really mattered, but out of all of our responses none of us mentioned checking the fuse unless someone did and I missed it. Not sure why it would be blown but unless it gets...

When you jumped the solenoid what exactly did you jump and did you have the key turned to on? If not, that wouldn't explain why it won't turn over using the key but it could be why you don't smell fuel or have spark when you jumped the solenoid.

You may have to look close. Sometimes it's very subtle and other times it's quite noticeable if you're looking for it. It doesn't take much of a bend to cause the starter gear to bind somewhat against the flywheel ring gear and slow things down.

Yep it is but like you say, if you can get the rocker cover off. And you probably already know but if you do adjust them make sure to loosen the center set screw first while holding the adjusting nut before trying to turn the adjusting nut. If not the nut will likely break in half. Seen it...

Don't snap it off yet. Valve clearance is NOT your issue. I'm going to guess you're working on a Courage twin or 7000 series? Improper valve clearance will not cause hard cranking on a Kohler twin. There is no compression release so the engine is always cranking under full compression. Nothing...

To see for sure if you solenoid is faulty try disconnecting what I will call the small excite wire from the solenoid. Then with the key in the off position reconnect the extra ground and see if the engine still turns over. If so without seeing all the wiring at the solenoid I would have to say...

Up to you of course but it's looks like you're almost there. If you don't give up, let us know. I have a thing or two that would be very easy to check.

I'm trying to visualize as well but having a little trouble. When the voltage dropped to 7-8 volts were you checking it right at the battery and was the engine actually turning over or was the solenoid rattling the only thing happening at that time? That is actually a huge voltage drop either...

Did this issue just start right out of the blue? Was there any maintenance or repair done right before this issue started? Is your 45 minute time frame based on starting with a full fuel tank every time? If by chance a fuel filter was recently replaced and a filter designed for a system with a...

Try going right to the negative terminal of the battery if possible. Every place you used still would run through the negative battery cable. Going straight to the negative terminal would eliminate the negative battery cable.

When you did your voltage tests where did you put the black lead of your voltmeter?

Got a voltmeter? Set it to DC. Put the red lead on the starter post and the black lead to a good ground. Engage the starter and read the voltage. What does it read? Do the same thing on both sides of the starter solenoid and the small excite terminal at the solenoid. Are all the voltages similar...

I know it's been weeks since you first posted but if you're still working on it, how does it run at full throttle?

Anything above 150 psi is good. If taken correctly and the engine is in good shape it could easily be 180. And .004 to .006 on clearance is correct.

If you've got good spark and are getting fuel to the spark plugs I'd probably be thinking a timing issue. Either ignition or valve. If the ignition timing if off that would mean the flywheel key is probably sheared or partially sheared. To know for sure the flywheel will need to be removed. I...

When did it last run correctly? Did you notice anything unusual the last time it was shut down? What is compression?

Even Kohler wasn't thrilled with the technology but pressure from the mower manufacturers forced the issue. These engines are primarily on home owner mowers and the mower manufacturers want to offer home owners a mower you just get on and turn the key. For the most part it's worked pretty well...

It's a shame that your dealers didn't have a good Kohler distributor or maybe didn't even contact them. Kohler came out with a kit to do away with the smart choke under warranty for those with repeat failures that for whatever reason couldn't be fixed. The cost to you would have been a choke...