Sport & Outdoor – Others

My 1978 Toro 826 snow blower has an 8 hsp. b&s engine model 190402-0914-02.The engine revs on high by itself, misses and backfires and flames come out the exhaust, and stalls. When turned off with the gas shut off a bit of gas runs out of the carb when the machine is moved. I was wondering if the points may be at fault and where they are on this old engine. Also think maybe the govenor is not working properly and need to know how to adjust/fix. Does this carb have a clip or spring wire on the float needle, as mine does not and I think it may have originally had one.I have tried to adjust the c
Experienced athletes share their insights in answering this question:
We had the same problem with our snowblower. we tried everything. ponits, adjustments. even converted points to electronics. we ened up putting on a brand new carborater and it runs great now. save youself the headaches and buy a new carborator. we spent $87. so much better

How to Identify and Resolve Common Issues ?

We offer a diverse range of insights on identifying and resolving common problems in sports. Our sources encompass academic articles, blog posts, and personal essays shared by seasoned athletes. :

The rough idle may be caused by many different things such as low fuel pressure, low voltage to the fuel injectors, dirty fuel injectors, a vacuum leak, a faulty Oxygen sensor or a dirty, or failing idle air control valve.
This can be caused by a number of things, including a dirty air filter or spark plugs, or a vacuum leak. If your engine is idling too high, it will cause the car to rev on its own even when you`re not pressing the accelerator pedal. Another possibility is that there`s something wrong with the transmission.
The main problem of revving high is the clutch slipping and the clutch needing replacement. As with the problem with the hoses collapsing, if it is a coolant hose, then the radiator cap vent is bad and the cap needs replaced. If the hose is something else, then it should be looked at by a mechanic to diagnose.
This could be from low fuel pressure, a clogged fuel filter, a clogged air filter, a faulty throttle cable, carpet blocking the throttle pedal, ignition system failures, computer problems, timing belt jumped, transmission, exhaust, and the list goes on.
RPM and power increase only up to a certain level for every speed level and gear combination. As you accelerate, the RPM and power will increase until a certain redline limit is reached – also called as Engine Redlining. Breaching this limit can cause severe damage to the moving parts of your engine.
The idle speed should feel consistent without skipping or slipping. In most of today`s cars, an idle speed of 600 to 1000 RPMs is average. If your car is idling rough, though, it won`t feel smooth. The RPMs will jump up and down, for example, or they`ll fall below 600 RPM (or whatever is typical for your vehicle).
Worn Out Spark Plugs

This means that your spark plugs are not igniting the fuel in each piston cylinder in a timely manner, causing your car to jerk around while accelerating. If your spark plugs are worn out they should just be replaced, as they are generally an easy and inexpensive repair.

Common causes of high RPM excursion at start-up are typically: large vacuum leak, throttle plate stuck open, cruise control stepper motor stuck in one position; faulty throttle position sensor, and/or faulty idle air control motor or solenoid.
4000 rpm is no problem, high rpm can wear down on the head where the camshaft rotates but that`s no really a problem until you get near 7000 rpm.
5000 RPM is excessive for most road cars, operating in top gear. I would expect to see 2000 to 2600 at 70 mph. Some performance oriented motorcycles may approach 5K RPM at this speed. I would check that the `overdrive` feature (present on most modern cars/tucks) has not been disengaged or is failing to function.
For most modern vehicle, you should not cruise above 2500 to 3000 rpm. Most of the turbo-charged engines develop a lot of more torque around 1800 to 2600 rpm range. Older engines, torque didn`t peak until 3500+ rpm.
“There`s a point at 7,000 RPMs where everything fades. The machine becomes weightless. It disappears. All that`s left, a body moving through space, and time.
Normal idle speed for your vehicle, once the engine is warm, should be around 750 RPM (roughly). Two thousand RPM is significantly out of range high, even for a cold engine.
No rpm is bad for an engine as long as it`s under the redline. It`s as simple as that. So if the redline is at or above 6000rpm, you can happily run it at 6000 rpm if you`d like.
500rpm is a bit low to me . Most cars I`ve dealt with it`s around 850rpm . If the idle is set to low when you come to a stop from running at a faster speed ( especially quick ones ) the idle speed may not be high enough to compensate to keep the engine running .
The most common causes of this on your vehicle are either a bad idle control valve, a dirty or failing throttle body, or a vacuum leak. It is very common for the engine to have a vacuum leak at the intake manifold gasket.
A common cause is a problem with the spark plugs or ignition system. Other potential causes include a blockage in the fuel line, a faulty oxygen sensor, or a problem with the mass air flow sensor. Vacuum leakages can also cause a delay in acceleration. A clogged air filter or low engine oil level can also be a cause.
Common causes of high RPM excursion at start-up are typically: large vacuum leak, throttle plate stuck open, cruise control stepper motor stuck in one position; faulty throttle position sensor, and/or faulty idle air control motor or solenoid.
Improperly functioning spark plugs cause an uneven burn of fuel in the engine, resulting in fluctuating RPMs and a louder noise. You might also experience increased vibrations of your vehicle while sitting idle or while traveling at low speeds.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

My engine revs on high by itself and runs rough
ANSWER : We had the same problem with our snowblower. we tried everything. ponits, adjustments. even converted points to electronics. we ened up putting on a brand new carborater and it runs great now. save youself the headaches and buy a new carborator. we spent $87. so much better

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I have a 2004 60 hp yamaha 2 stroke outboard engine that doesn’t start or run well. Once warm and in the water it will idle in nuetral and also in gear. It accelerates in neutral but will die or lack power if I increase throttle while in gear. Engine will somtimes get to top speed but often while running at top speed engine will start to slow rapidly. Engine has full range of operationout when out of the water where there is no load on engine but is still difficult to cold start. Before these recent problems the engine sat up for several months and I had to change the impeller and spark plugs. Spark plugs fire, cylinders have proper pressure of 100, 100, and 110. I cleaned some fuel lines and filters and got new gas.
ANSWER : Every sympton you are describing here can be attributed to fuel starvation due to blocked jets and or water in carbs, when your engine dies does it die with dry plugs, or wet oily ones?

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Extremely high rpm’s in neutral
ANSWER : Maybe the idle speed needs to be decreased, or check for engine overheating since you said that this happens after you have had the engine on for a while, this too can hcause strange rpms.

Good Luck!

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I have a 99 yamaha f100 four stroke outboard. Problem I have is boat will acclereate fine get up on plane and after running for about a mob at wot will decell and only run around 4500 rpm. Then after coming back to idle will have a slight miss then run smooth and repeat every run. Changed the plugs and fuel filters alll oe yamaha has fresh oil timing belt is good any ideas will help or fuel psi spec. I am an ase master automotive tech so I know alot about engs. To me it feels like it’s running out of gas. Like the carb bows are full when I take off but then runs out after running wot. Any info will help
ANSWER : I have exactly the same problem with my Yamaha F100, have you got any solutions yet?

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Engine runs rough when we throttle up
ANSWER : Sounds like a spark plug issue. If the spark plug is not torqued after a good number of months it can seep at high rev sustained pressure. Otherwise I would look at the spark compensator or possibly the float.

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Rough idle 2 cycle outboard
ANSWER : Sounds like u need to do a tune up on it. clean the carb, new plug

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LX 188. Engine suddenly dies. The fluel in the bowel of the fuel filter is empty. If I crank the engine the filter becomes dry and is collapsing some but the engine does not start. When I remove the supply line from the fuel pump to the carberator and crank the enginge there is a strong stream of gas being pumped out. I tap on the carberator ??? is the float is hung not allowing fuel to enter. Cranking the engine with the line off refills the bowel of the gas filter. Reattache line to the carberator===engine starts. Ran perfect for 20minutes then suddenly died. Repeated all the above and engine again started. What to do to fix this? Thanks
ANSWER : Debrie inside the needle and seat area which has to be cleaned out with carburetor cleaner and compressed air

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