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Sounds like the orbital steering assist hydraulic motor has failed a seal. You would have to search around or contact some mower salvage yards to find a used one most likely. Ebay might have some parts for this mower. These were only built from '87-'89. It's been around for a while.

Compression at 30 PSI is way too low to support combustion. These have a compression release and usually show around 60 PSI for a compression test when pulling the rope about 4 times. I suggest you check the valve adjustment. Next, remove the air cleaner and backing plate to make sure the...

https://mowpart.com/bracket-l-roller-75576-758-610hon/?msclkid=79b846c6448f1f63ef3c2e77abc77e3e&utm_source=bing&utm_medium=cpc&utm_campaign=Traditional%20Shopping&utm_term=4588674348113576&utm_content=Catchall

Do not have a charger connected when testing but make sure the battery is good. Only test for voltage drop with the key switch held in the crank position for each meter reading test as you move around. Remember to only test one (the same) wire or cable at a time from end to end.

Are you looking up the mower info y using the product label information? A "mulching kit" is a kit that is added to a normal deck on a majority of models.

Sounds like the exhaust is plugged with carbon. Air cannot get in if exhaust cannot get out. Some have a simple spark arrestor screen that needs to be removed and cleaned while other have a wrench fit exhaust spout that has the screen made into it. The screen needs to be cleaned with a fine wire...

From your description, it needs the valves adjusted so the compression release will work. If it still fights the compression after adjustment, the engine will need the camshaft replaced.

Hi ACF, Here is an example of the voltage drop test: https://www.bing.com/videos/riverview/relatedvideo?q=Voltage+drop+testing+on+a+rider+mower&mid=0B900E312C6FCE7034ED0B900E312C6FCE7034ED&FORM=VIRE The trick is power has to be flowing on the circuits with the key turned to the crank...

Where is the line that leads to the carburetor come from? They may have it plumbed so one tank is the primary and the other is the reserve. If is not that then someone (creative shop tech) changed the line around to only work with only one tank. When I was at a local John Deere dealer as a...

Are you familiar with using a meter to do voltage drop testing?

Are you cutting with the mower RPM set to high, or trying to save gas by cutting at low throttle? Mowing should be done at full throttle and use the hand controls for the speed and direction. If you are trying to mow too fast that can also cause problems.

Okay?

Hello ACF, StarTech sent you diagrams, apparently the second one is a match to your machine. Print off and study the diagram. Use it like a "road map" to steer you to where the problem is. You also mentioned in an earlier reply that the key will engage the starter, but the starter does not...

Do you have a multi-meter or a single bulb 12V test light. Just randomly changing parts is not diagnostics, it's a lesson in futility.

Sounds more like it needs landscaping and sod put down. The grass is not hard; it is the condition of the ground.

I don't think too many folks are going to rush right out and order Amsoil for their modern throw away 2-stroke just so they can conduct a private study.

Thanks for letting us know you have it going again.

Are you getting voltage to the small trigger wire when the key is turned to the crank position? If so, it is not it is not a safety switch issue, it is a solenoid problem.

I would not advise anything with fuel injection on lawn equipment. The technology is too new and unreliable. But it's your money.

You need to use an adjustable gap spark test and get rid of the inline "Christmas" flashing light type spark tester. You can get a coil from Parts Tree or Jacks small engine.

I'm curious as to why you want softer tires.

This problem sounds like the wrong blades are repeatedly being used. The three blade decks have the middle spindle placed forward of the 2 out spindles on purpose to prevent "mohawking". Putting incorrect blades that are too long, they will hit the deck housing. I have had this issue once...

The clutch pedal also acts as a brake when it's pushed all the way down normally. If it is not braking, the brake cable is broken or out of adjustment or the brake pad is worn out.

Sometimes it is simple but seems difficult. The KISS (Keep It Simple Silly) principle typically applies.

Hello VPF, Most shop newer small engine shop techs have never worked on the older rear engine riders, so that would be a waste of time and money. Is first gear position actually that fast or is it the sudden lurch forward that is surprising you? The clutch is pretty sudden on these, so the...

Can you attach a picture. Your info says it is a zero turn. What brake are you referring too?

Hi Dartlover67, Are both of the operator levers in the rest position?

I recommend you replace the drive belt along with the stationary and idler pullies. The single speed F/R transmission in these old riders were bullet proof. They used a light grease and not a pour in fluid.

I have the same thing happen from time to time, especially in the late evening.

Sounds like a sensible plan. Hope it works for you. As a temporary idea to test the theory use a wad of fiberglass house insulation and wrap it in heavy tin foil or tin foil tape, then shoved in between the side of the block and the carburetor, especially at the carb bowl area.

The after-fire solenoid is in the bottom center of the carburetor fuel bowl. Often times the connector pins are a poor fit, especially on aftermarket carburetors. Turn the key on without cranking the engine, a faint click is usually heard at the carburetor if the solenoid is working. If no...

The PTO switch is possible, but all the PTO wire connections need to be checked and verified good with at least a visual inspection and a test light to see if it has power or where it is losing it. If you are not mechanically inclined, try to find someone who is. The part diagram exploded view...

Hi Doug Lee, I find that a little hard to believe as well.

Read your post again.... First grab a fresh cup of coffee. LOL "The software is virus" "you recover quickly lose a day's work" (That's a good one)

Hi StarTech, Why repair an engine when you can sell a new one at a considerably higher profit margin and pay less labor? That is a win for the dealer parts department, but the dealer shop gets the short end for the labor.

Thanks for the refresher on the symbol. That leaves the 620 Tan wire or there is a loss of oil pressure. Maybe we will hear something back from the OP.

I've got some 40-year-old 2-stroke equipment that I can still rely on. It's all about proper fuel/oil mixture and fixing the little things before they get out of hand. I use non-Ethanol fuel in my mix.

Mowers break even at 110 hours. It may be a simple connection issue or a rubbed wire problem. The switch is possible if people have been yanking on it too hard. We need the product identification number off the label under the seat. There needs to be some simple testing done.

Here is one example, not sure if it is correct...

That's all anyone can ask for. Lawn equipment is getting incredibly expensive these days and people are more inclined to attempt repairs or seek credible advice more and more. Myself along with many others are just simple experienced volunteers. We try and assist when possible, but it is crazy...

I notice the oil light has a diode, maybe it is open? Does the light stay on with the sensor connected or disconnected both while running?

Hi Darrel, This machine was made from 2008-2015 according to the web information. No one knows for sure it needs and engine until it is properly evaluated by testing the compression and checking the fuel system. Most shops can easily do this in an hour. It's way too premature to say it needs...

Many modern dealer techs are just there for a paycheck and waiting until and easier job comes along that does not require them to think. LOL This thing needs an oil pressure test with a gauge before the engine decides to possibly come apart. These have an oil pump system that pumps oil to the...

Let me guess.... transmission input shaft? Hey, the guy in accounting and inventory said it would work. LOL "It's just a stupid snap ring" What's the worst that could happen?

I am not disputing what you say, but at the same time I have seen way too many of these high-end mowers and other lawn equipment neglected, broken down and left sitting before they were even paid off. There is such a thing as overspending to impress the neighbors.

Them there be leftover parts. Someone playing a joke on you?

Why do people besides landscape contractors spend this kind of money on a mower?

Hi StarTech, That is what we get on open forums like this. Gratification is a rare occurrence. Most people jump on the net for a quick instant answer and if they don't get it in 30 seconds, they jump over to another search or surf through hours of You Tube videos to learn how to change a spark...

One thing that comes to mind is fuel percolation in the fuel bowl after shutdown. All that post-shutdown engine heat directly effects the carburetor. Years ago, we had to look around at similar models to find an insulator/ heat shield that mounted with the muffler, but extended down to protect...

70 PSI is barely enough to support combustion, but it has a compression relief so that should really not be an issue. New coil? As in Amazon? I avoid Amazon due to the many problems I've had over the years.