Search results

Here is everything you ever needed to know about oil but were afraid to ask: Very enlightening. https://bobistheoilguy.com/forums/

That seems to be the standard of many dealerships.My sister took a JD garden tractor to the dealer for repair.It would get very weak after running a few minutes,and after it cooled,it was ok for a few minutes. The dealer changed the air filter,cleaned the plugs,replaced an intake gasket and...

Add a spring to the springs (#3) to add tension to the left belt around the pulley because it is longer than the distance around the shorter side of the right pulley.These springs can get weak over time,and that will make the left side slip easier than the right side.This is why the factory...

I only know that it works for me.I had a generator that had been sitting for several years,and it would run with fresh gas when choke was on,but died when it was taken off.It could reach top speed with the choke on,so I add some ATF and started it up,let it rev to full rpm,then held my hand over...

Do not use a torch-tip orifice cleaner..they have notches like a file,and they will enlarge the orifice,creating a non standard fuel ratio that cannot be adjusted out.Use a straight pin or needle that will just barely fit the orifice.Blow carb cleaner through all holes to check for blockage. I...

The total length of the blades is not necessarily equal to the the width of the cut because they are mounted in an offset angle from each other. Make sure the blades are mounted in the proper direction:(not upside down). This could affect the uplift of the blade.A solution may be to install 3...

A "RS" or "2RS" suffix is a rubber sealed bearing.The "2RS" is sealed on both sides.A "RS" is sealed on one side only..A shielded bearing,like with a "KD",or"KDD" bearing is a shielded bearing,It is designed to keep dirt out,but not keep grease in.A Sealed bearing does both. The inner shield or...

There is a very small spring that is parallel to the governor spring.It seems to do nothing,but it takes up the slack in the governor spring hole to prevent surging and hunting.It prevents what they call hysteresis.Hysteresis is good in some cases,like a pipe wrench for instance,the sloppy fit...

To get the max hp,it must be run at the specified speed.The fan for cooling is part of the equation,and most air cooled engines run cooler at rated speed than slower speed because of higher oil pressure,more air flow. At the speed you are running,it should not have a big effect,unless you are...

HP is rpm X torque.HP is more important than torque itself,because torque is only one part of the equation.I have seen a 1/16 hp electric motor pull concrete anchors out of the floor,but it was geared like a clock motor...very slow. Most (but not all) small mowers are rated at 3600 rpm,so hp...

There is an impulse tube from the crankcase to the carb that uses pulses from the crankcase to pump fuel to the carb.These impulses operate the diaphragm in the carb,so make sure the impulse tube is not cracked,clean, and not leaking air.This can cause the exact problem you describe.

The rust and trash in the fuel cutoff solenoid can physically jam the solenoid and prevent it from working properly.The seat switch is a common problem.Put a jumper across the wires of the switch and see if that solves the problem.If so,replace the switch for safety. Kohler had lots of problems...

The new fuel anti;knock compounds in gas foul a plug very easily,and is almost impossible to remove the fouling by normal means,wire brush,etc.The fouling is not visible. I have found that using a propane torch to burn off the tip and ceramic parts of the plug cleans and restores the new...

Try this:Open the throttle wide open.Crank over engine and see if raw fuel comes out of spark plug hole.If not there is definitely a fuel supply problem.Did you change the fuel filter? Sometimes they will clog inside the tank,so remove the fuel line fitting at the tank and check if it is...

The proof is in the pudding as they say.No repeat failures with the 1n4007.When I was 10 years old,I was building cat whisker radios,(1960's) then vacuum tube radios,then transistors came along,solid state radios,then binary computers and I learned binary,boolean algebra, various programming...

That is not what I am saying.Read my reply carefully.The flyback(reverse voltage) is the most important in this case. The spike can puncture the P/N junction long time before the current can affect it. The applied constant voltage is the max it can withstand,not that it is the applied voltage in...

The 700 volts is the maximum constant supply voltage that it can handle. The PRV is the reverse voltage it can handle.The reverse spike is a very short,sharp, low wattage,high voltage surge.Look at the spike on an oscilloscope,you will see what I mean.You do have an oscilloscope,don't you? My...

1N400X Diode Reverse Voltage 1N4001 50 V 1N4002 100 V 1N4003 200 V 1N4004 400 V 1N4005 600 V 1N4006 800 V 1N4007 1000 V

Yes.The diode I recommend is better than the oem. The oem is the minimum to do the job, and the cheapest.It also allows them to sell more parts.Look at the price for the replacement parts that cost only pennies each.Lots of companies making lots of money due to the dumbing down of...

A 1N4007 diode will wok just fine.It has a 1000volt peak reverse voltage.Here is a link to diodes on Amazon.Cheap as dirt.The negative end has a line on it,put this to the positive end of the solenoid..it should only conduct when the reverse spike arrives,hence the reverse connection.You may...

Is the hole in the blade round,or star or other shape?If not round,and perfectly centered your results will not be good.Use a level to check your tester with blade attached.Mark center of the level as precisely as possible.Check left to right across blade,and end-to- end. A single nail in a post...

A mower was brought to the shop with same problem.The belt was routed wrong.The flat side of the belt was rubbing against a guide.The Kevlar belt was still good.Tough stuff.It would stall when deck was engaged.My guess is a mis-routed belt,based on years of experience.

Most engines are designed with a certain rpm for max efficiency and durability.Fans and pumps do not respond in a linear manner.Double speed does not double air pressure,it cubes it.Thus it is critical to maintain a desired speed for calculated air pressure. Running at a low speed when cold does...

Purchase a nut-cutter from amazon.It will cut off nuts without damaging the threads.Saves a lot of time and trouble on otherwise stuck or cold welded nuts.About $8 or so.Worth it if you do much mechanical work on anything.There will always be one that is stubborn. Metal Nut Splitter...

No firing order found?Here is an old school method to get the tightening sequence right: Start in the center and tighten in a expanding circle from the center outward. Imagine flattening a sheet of paper from the center.Same thing.You want the wrinkles to go toward the ends.The metal is...

Do you use starting fluid?This will blow a head gasket if used to much.It can also STRETCH the head bolts,and the bolts will bottom out without actually crimping down on the head properly. A washer under the head bots is a cheap fix,but the best way is new head bolts,or grade 8 bolts from the...

Sounds like a valve stem seal problem. Valve Seal Part Number: 690968 (double check this number versus the ENGINE Number on the data plate on the ENGINE). They are easily damaged when installing,so don't use a screwdriver to work them down over the valve...

I have a Husky mower with a Kohler 27hp upgraded motor that had the solid state ignition: (DSAI I think it was). It gave lots of trouble,so I installed an upgrade,which is the old magneto type ignition.It runs good once started,but it is very hard to turn over.New battery fully charged,tight...

The choice depends on your mechanical skill level.The easy way out is a new motor..not cheap,but then you have a brand new motor.Just keep the oil at the right level,check every time before you start to mow,and do not over fill,overfilling with oil can lock up the engine,as well as blowing...

I recently bought a used Scag Tiger Cub,and it runs good till it gets hot,then the right lever feels rough and does not respond well to movement.It has a rough spot in that lever even when not running,sitting still.Linkage seems to be in good shape. Oil was changed after I first got it.Used...