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Hello MParr, Inside the crank case unknown but there is no unusual noise when cranking and both pistons move in the cylinders. I do not think the owner has done any adjustments or service except change the oil and filter and refuel. The oil appears to be way overdue because it is very black.

You are in way over your head. Look into getting a used engine or refit a new engine.

I vote for pulling the carburetor off, removing the bowl carefully so the bowl seal does not get damaged, then clean the gel out that used to be stabilizer and fuel. It is best to stay with the original carburetor if possible because the main and pilot jets have been calibrated to your motor...

I considered putting a trailer hitch on my RZT 50S and then started adding things up. For short pulls it would not be much of an issue, but the heat builds up quickly in the hydraulic drive motors. Water is approx. 8.33 pounds per gallon. Add the weight of the tank assembly and the trailer and...

Hello MParr, Thanks for the reply. I have not seen valve guides available for any Kohler engine in years. I will know more after I get past the rain we are having because the machine is outside. I don't have room to bring it in my 2-bay shop. I am going to try heating the intake valves before...

Hi Slomo, That is still the mystery I have to determine. It is outside and it is raining around here currently. I'm also going to verify the compression release has not been damaged before I dig too far into this engine. If it has, the cam will need to be replaced which just adds to the...

Hi Tiger, I almost installed in a couple of good pushrods until I went to check the intake valves individually and they would not budge while being pushed down by hand with a hammer handle. Both exhaust valves could be opened and spring right back like normal, but the intake valves stayed...

Ah, the illusive oil stick that has plagued owners for years especially if they are perfectionists.... Just think, engineers do this stuff to create confusion. If the level reaches the middle of the check/add range on the stick after checking a couple of times in a row, leave well enough alone...

Hello sgkent, I am going to tear into it depending on how the rain holds out in my area. This has got my curiosity peaked as to what I will find out. The owner has been good about using non-ethanol fuel, but I don't know if any additives mixed in. The fuel tank is practically empty. When I do...

Hello folks, This problem is a first for me to come across. Craftsman/MTD CMXGNAM211704 zero turn with a Kohler PS-KT735-3077 engine. The customer brought it to me after we had discussed some troubleshooting steps over the phone without resolve. When it arrived, I check for compression and it...

If your oil smells like gasoline, the carburetor is bleeding fuel past the float needle. It has had fuel sitting in it for extended periods between use or the float needle is bad. The oil needs to be changed, and the carburetor properly cleaned... Especially on the inside. In the future, it is...

Hello J., Go back over your work. Lift the mower with the deck attached and see if the blades are simply pinned against each other or the deck housing. Ask yourself why the center spindle housing/pulley broke. Was their hard impact with an object or a tree root that created the damage?

My gosh, has the world gotten so **** about how short to cut grass before Winter? The grass is going dormant, the roots are sleeping and waiting for Spring. The top grass does not really care because it is dead before long. The only reason I cut before Winter down here in South Texas is to take...

Have you disconnected to coil kill wire and run it to see if the problem still exists? Along with what you describe, it may be an ignition coil breaking down. If it has a Torch plug, I will say throw it away and try a known good plug.

Sounds like a nice machine, but remember things end up at an auction for various reasons. If they will let you test run it, that will tell you a lot. If it is an "as is" sale, then be careful to check it over really well. Liquid cooled Kawasaki engines are very reliable if they have been...

There is no "quick fix" or short cut for this repair to make it reliable. Items 552 and 691 in the attached diagram. Your shaft bushing is sticking out too far and the case will need to be opened up, and the bushing pressed into place properly with a press or a shouldered pin punch with the...

A very common problem on these with age is a worn throttle shaft and carburetor housing or a mounting gasket to the head is sucking air. The dust and dirt kicked up by a tiller is usually much more than a typical mower unless you till in the early morning when the dew is still present.

Most manual inline fuel line shutoff valves are 1/4 inch. Some are 5/16 on larger engines. The fuel line usually has markings indicating what diameter it is.

This sounds like the tip of the crank has been damaged from multiple loose PTO clutch installs. If the clutch does not install with a snug initial fit, then the tip of the crank has been worn out of round. The next issue is if plain washers are being used or the correct "flat side" thick spacer...

They are designed that way for a reason, don't try to reengineer it.

The solenoid on the fuel bowl is known as an after-fire (backfire) prevention solenoid and prevents fuel detonating in a hot exhaust after ignition shutdown

I've never seen one of these made with tan plastic. Unhook the line going to the carburetor and use a jar or similar catch device that can hold fuel. Crank engine and see if the pump pulses the fuel out while cranking. If it does you have good fuel delivery. The next item to check would be the...

Is the pulse line split where it goes to the fuel pulse pump? Can you take a picture of how the fuel pump is installed and connected?

Clean and tighten all connections starting at the battery. Corrosion starts as a thin film and does not always look nasty and crusty. (Looks good is not a verification of clean metal to metal contact). Chase each wire and check connections for green corrosion. If you have a basis multimeter and...

Hello M., Welcome newbie. It helps us to know the model number stamped in the top cover or etched on the side of engine block (opposite the carburetor). Without knowing the model number, it all becomes a guessing game. One thing I can immediately think of is the air cleaner backing plate...

Hello RevB. A Belleville washer is "cupped" in the middle and made of spring steel. It acts similar to a split lock washer but hold consistent pressure much better. A typical flywheel retainer nut has a Belleville washer under them. They were used on practically every old-style engine that had...

Hello R., Apparently, you get better ethanol blend fuel than I do down here in South Texas. The constant high temps down here breaks down the fuel in most everything that sits and has a carburetor.

Another option just came to mind... What about adding tire chains. I did that to a rider years ago for winter use and ended up leaving the chains on and it did not tear up the yard when mowing as I recall.

I remember my uncle who raised me picking up scrap mowers all the time. One of them was a 5HP B&S and manual transmission like you describe. That thing operated good until you hit any kind of minor incline. He also picked up an 8HP snapper rear engine rider and that thing was like a little...

Have you tried dropping your tire pressure down?

If the battery is showing 12.5V it's on the way out. If you keep trying to use it, it will damage the starter because as voltage goes down the amperage draw of the starter goes up and creates a lot of heat in the starter armature when it is powered up to turn the engine.

Hello F., I could care less about owning an EV. At the very least I might tolerate a Ford hybrid just because I have worked on a couple of them and they are pretty reliable for the most part. What many people don't realize is that electric vehicles were even developed back in the 1800s but...

Hello N., At 10 years old, I suspect the battery that is in it currently has been replaced at least once. The most important thing to consider is the engine fires up quickly so it does not have to crank for an extended time.

Hello TSE., I think the over hyped controversies come from people who were raised to neglect their equipment and blame it on the machine rather than the person honestly admitting their stupidity/laziness. (It ran fine when I parked it) With newer plastic body carburetors, I can say ethanol...

In the past 30 years we have become a nation that overproduces fuel related crops (dry corn and sugar beets) more for ethanol production than regular food for human consumption. Soybean crops have also become popular in recent years to produce bio diesel to mix with regular diesel. Both of...

A modification I have used on several old farm tractors, riders and zero-turn mowers is old automotive engine valve springs. They are stiff but provide a little bit of extra shock absorption. Basically, you remove the old, hardened rubber bumper then use a bolt nut and washer to hold the spring...

New belt with hardened areas from sitting a long time (waiting for machine to be sold) and new paint creating excess friction on the pullies would be my observation. Sit on it with the engine on high idle and the deck engaged for 30 minutes. If it does not start smoothing out, then plan on...

Time to insist they get an area rep involved to find out what is going on. I also recommend you call the factory customer support hotline and get them involved.

Have you considered making a ballast box to sit on the rear or a small utility trailer with some weight?

Even if you clean the inside of the case and sump very well, run it for 15 minutes and change the oil again. On the second change if you still see glitter in the oil, change it again until you have very clean oil. (Use cheap oil until you run it a few hours for break-in.) If this glitter is...

Sounds like a problem wet grass, cutting with cheap budget low lift blades and a chute restriction. Did you buy this from a box store or an actual Bad Boy dealer?

Hello C., The D adapter is seldom included in the ones I have ordered. The adapters are made to standardized dimensions, so they are not machine specific. There are cheap "universal" clutches on the market that do require wiring modifications, and they seldom hold up as good as the name brand...

Hello C., I see the double D style adapter used on most riders with electric PTO clutches and the stacked pulley design use just the washers and bolt.. The IPL may have had an amendment or a technical bulletin after the original publication. I also find that IPL's are often recycled and cross...

I have my generator full of fuel and the cover is not easy to access for the numbers. I did look up a B&S 10HP snow blower engine and came up with a model 20D414-0017-E1 It shows to have an electric start flywheel 695485 on Parts Tree

This comes back to what I mentioned earlier about keeping treated gas in the fuel tank for starting and warmup, then shut the gasoline fuel valve off. As the engine dies down, open the propane tank valve and run it on propane. It is a pretty smooth transition. For mine, I did not want to go...

I have my generator tank full of fuel and the cover is not easy to access for the numbers. I did look up a B&S 10HP snow blower engine and came up with a model 20D414-0017-E1 It shows to have an electric start flywheel 695485 on Parts Tree but supersedes to 794812. B&S has constant part...

Retighten your engine mounting bolts as well. A ground problem is usually the last place that people think to look, but it is half of the 12V electrical system that makes thing work.

The trouble is that your original engine number information does not call for an electric start option. I will get the engine information off of my 10HP (electric start) snow thrower engine which I adapted to one of my generators. The flywheel does have a ring gear for a starter, but no stator...

These plastic cams can create a twist break in the middle and still turn, but the lobe(s) will be out of relative time to the stroke of the piston action in the cylinder. The valves will appear to open, but not at the correct time.

Key switch is supposed to send power to the solenoid when in the cranking position. Is it doing that? If so, then the solenoid pull-in winding is not working to activate the starter so it will crank the engine.