15

This engine is equipped with a voltage regulator. Depending on the exact construction of the regulator a reverse current would be disastrous, especially the high current from a starter battery


10

Every time you use them, Periodically tap the head on the ground to advance the line. It's important, though, that the head rotates at full speed when you tap it because the centrifugal force of the spinning is what advances the string. Always tap the trimmer head on a soft surface, such as grass, and not on a hard surface, including concrete and wood, or ...


10

Why not just put a wrench on the crankshaft? Ignoring the electrical repercussions, I fear damage to the starter, too. Besides, if the starter on this tractor uses a sprag clutch (and probably most other designs), it wont engage backwards, anyway.


8

The main difference between an air compressor and an internal combustion engine is the compressor doesn't have the heat/detonation phase which an engine does. This actually helps keep it cleaner than what you'd think. (So people don't think I'm crazy, an internal combustion engine and a compressor are both just air movers ... they just accomplish it a little ...


8

Looks like the starter drive is the typical spring loaded drive gear that engages when the starter motor turns in the "forward" direction, then disengages if the engine starts running and overdrives the starter gear forcing it to disengage. So if you run the starter motor backwards, the starter gear won't engage at all, and the starter will just spin. And ...


7

More than likely what the problem is, your float in the fuel bowl is shot. When the float is shot (ie: doesn't float correctly in the fuel), too much fuel is let into the carburetor and causes the exact issues you are talking about. You may be able to get a new float and needle valve (very likely), but you may just be better off buying a new carburetor. ...


7

I made a gasket for a small single cylinder engine from a copper sheet. Annealing and making it fit are obvious... But it worked perfectly. Would I use "goop" - no. Making a paper template is handy, I have had success with laying suitable brown paper on to the block or head, sticking with grease or similar, then tapping gently with a tiny hammer to break ...


6

Specifically a foam filter for a lawn mower needs oiled, but just lightly. A foam filter lacks the ability to stop small particles as compared to a paper filter. The oil is added to make the filter "sticky" to these small particles giving the foam filter better filtering capability. As far as major engine damage, probably not. Worst case scenario the engine ...


6

I dumped a lot of fuel stabilizer and lots of this other blue enzyme stuff in the fuel tank and when I used it for this most recent snow, it never hiccuped. I guess it was bad gas.


6

No. Other than the hole in your pocketbook. On a separate note, though ... if you are going out of your way to purchase all of those spark plugs, you'd be better off just getting the platinum or iridium plugs which last much longer. For half as much again, you can get a plug which will last several times longer. Some of them will even boost performance over ...


6

This does not sound like an electrical problem to me. Let me break down the issue a bit and see if we can come to some conclusions. The engine starts fine with starter fluid. This tells me that it is consistently generating a spark. Hence, we can rule out electric systems, except the possibility of a weak battery. You are turning the engine for a ...


6

Not for a head gasket. These are typically covered with a thin foil that resists the high temperatures of combustion or are made from a heat-resistant material. They are alo thicker that basic bulk gasket material and you could be artificially raising the compression ratio with thinner material. Get the right gasket for this. Generic gasket material or ...


5

I probably have the same engine, is it the 9HP Tecumseh Snow King? There are several possibilities. Here is what you can do to debug the problem when it happens. Water intrusion to the ignition area. Pull the spark plug, put it against the block, and pull the starter while looking for spark. Best done in the shade. Better yet use an inline spark tester. ...


5

There is no formula or calculations that you could run. Adding an aftermarket supercharger is more of a trial and error versus scientific calculation. The reason there is no formula or calculation is because there are too many variables to account for. In no particular order. Strength of the engine including but not limited to crank shaft, connecting ...


5

Even if there are no polarity-sensitive electronics to damage and the starter motor was able to engage, it is unlikely that the motor would rotate backwards anyway. Most car starter motors (in fact all that I have worked with) do not use permanent magnets, instead opting for coils for the stator. I suspect the same may be true for your lawn tractor. ...


5

Yes, you can bend the tab The metering diaphragm enriches the entire range on every circuit. If the fuel level is higher it will require less vacuum under Venturi's Law to pull the fuel from the 'float'. You can use the metering diaphragm float tab as a method to enrich all of the circuits and then adjust your low speed circuit with the fuel screw to lean ...


5

It looks like the gasket fried because it developed a leak and over time the hot exhaust gasses degraded the gasket even further. You should ensure that both surfaces are flat and free of any bumps, ridges or indents that could further exacerbate the issue once you fix the issue with a new gasket. There are exhaust gasket sealers if you determine that you ...


4

I was able to do it by doing a model and type search for manuals on the Briggs & Stratton site: http://www.briggsandstratton.com/us/en/support/manuals/engine On that page, enter the model and type of your engine, and the cover of the resulting operators manual has the series numbers that match. There are 3 or 4 series listed for your model and type. ...


4

You dont need to change them that often as 5k that would just be useless. what @ᴘᴀᴜʟsᴛᴇʀ2 said about the aluminum heads is perfectly right. Change them along with your timing chain or water pump. you have to really careful when changing them. Don't over tighten the spark plugs, don't use any dropped spark plugs. screw them in using a 16 inch socket and ...


4

Since the volume of your engine is fixed and your air pressure is fixed as well your only way of getting more power output is by playing with air temperature, fuel type and controller. Cold air intake would increase the mass of air that enters the engine and thus produce more pressure during combustion. A high flow catalyst and exhaust would allow the ...


4

I'd drain the extra few ounces out and keep running it. Doubt you hurt anything permanently. You didn't say exactly which model you bought, but assuming it is the $399 HRR 21 there is no oil pump. The vertical crank would splash the oil around more than normal but that is essentially how it lubricates anyway. The higher oil level may have pushed some oil ...


4

More than likely the float is saturated or non-existent, allowing the bowl to be over filled constantly (not stopping the flow of fuel into the carb). It could also be the needle valve not seating correctly allowing the same thing to happen. You can try replacing the float/needle valve (there are generally kits for this), but personally, every time I've ...


4

Possible causes: Worn clutch plate. Clogged air filter. Clogged carb/fuel delivery system. loose chain/issue with chain sprocket. As for your gear slipping, tighten the clutch , it happened to me too when I used to own the same motorcycle.


3

Well if you know the oil is leaking from the bolt on the pan I'd say you obviously don't have a good seal. I would re thread the hole and replace the washer and bolt. I stripped the oil pan bolt on my Yamaha R6 a while back. With a little bit of trial and error I discovered that it was a 14mm 1.25 thread so I picked up a 14mm 1.5 thread tap at Autozone, ...


3

To answer my own question: I contacted another mechanic with this issue who fixed it in no time. I feel quite stupid now... The problem was indeed with the fuel line. The fuel line was clogged with some bits of grass that had fallen in during refilling. But it was clogged in such a "creative" way that the fuel pump was able to pull some fuel through it ...


3

I had a similar issue with my Craftsman mower. Turned out the needle valve was sticking. Once it started, I could tap the side of the carburetor with a small hammer and it would then keep running. Replaced the needle valve and it's been running fine all summer.


3

It's always good to start your engines periodically no matter the size. I don't know any secret formulas but here is what I do. If it's small motor, like a snow blower or lawn mower, I start them at least once every 3 months, if they are going to sit for extended periods of time. I also use a siphon to take all the fuel out of them while sitting. For cars ...


3

Your best bet is to get a replacement carb. Some have had good luck rebuilding them, but for the trouble of it, it's just a lot easier to buy a new one off the internet. Personally, I can never get them to run right after a rebuild. You can usually get one for less than $50 depending on the model. After you put a new one on, ensure you have a cut off valve ...


3

While I can't provide the technical details as to why, I would say your weedeater is performing as expected. With full choke and full throttle, you are flooding it when the muffler is attached. I would expect that you would smell or even see fuel coming out of the exhaust. However, with the muffler removed, the backpressure is so low that the engine can blow ...


3

To have a level difference equivalent to one-third of the difference between min and max is quite large. This tells me that the dipstick is not fully seated in the dipstick channel in one of the orientations. I would consider the orientation in which the dipstick rests lower in the channel (resulting in a higher level reading) to be the correct one to use.


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