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Discussion Starter #1
1) Why does oil turn black after a while?

2) Why should I change my oil every year?

3) Why should I change my spark plug yearly?

I changed my oil and spark plug last night and I was wondering about these things.....
 

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supposed to change oil every 3000ish miles, because oil breaks down, and isnt as smooth as it is when it's new, that's why you're supposed to change it.. oil turns black because of constant heat and age (i believe), and spark plugs get dirty from carbon build up from igniting the fuel/oxygen mixture that powers your engine, and therefore need to be changed to keep a good spark and burn all the fuel...
 

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Ahmadi6490 said:
2) Why should I change my oil every year?
lol, usually ppl drive more than 3000 miles a year! i change my bro's car's oil every 3 months
 

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It depends on the car sometimes, but more on how you drive it. I drive alot and I dont drive easy so I change mine every month at 3000 miles religiously. I hit that in a month easy.
 

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oil=3000 miles

spark plugs should be changed like every 20,000 miles i believe

i guess it depends on the spark plugs but i have 2 fords and they recomend 20,000 mils for a spark plugs

i could be wrong ill double check and get back to you on that
 

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Ahmadi6490 said:
1) Why does oil turn black after a while?

2) Why should I change my oil every year?

3) Why should I change my spark plug yearly?

I changed my oil and spark plug last night and I was wondering about these things.....

1. the oil picks up carbon deposits, is sometimes burnt, and also picks up some metal shavings from where it isn't doing its job at the highest degree...

2. you should change your oil every 3000-5000 miles, if you change it once a year, your car is going to die. failure to change your oil in the proper intervals to can lead to the oil congealing in your oil pan, meaning that no oil is getting to your engine, which equals DEAD ENGINE, and a majorly flat bank account.

3. as your spark plugs begin to wear they do not produce nearly as much spark as a new plug, this in turn means that during each cycle of the engine the spark plug is unable to detonate all of the fuel/air mix, which can lead to spark knock(which evnetually destroys an engine), as well as poor fuel economy.

proper maintinance of your cars mechanical system is essential to keeping your car trouble free, and your mouth free from needing to be washed out with soap(as a result of getting poed at your car). thumup:
 

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What do you want to know about the carb? A carb is basically an atomizer and air intake control. As air gets sucked in by the motion of the motor the carb puts atomized fuel that comes out of a jet or jets in the air that flows through it, at the same time the carb controls the air comming into it (throttle) usually by a little gate or valve, which controls how fast the motor is allowed to move and how much fuel it gets. (That is the real simplified version)
 

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Well, really I need to know what motor is on it so I can see what kind of carb and jets it comes with.
 

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First, Check this out: http://www.jackssmallengines.com/carbprob.cfm

That has some good info, now first you said you changed the spark plug. Did you make sure you gapped it to the right size? If it isn't the right gap it may fail to start or will start and die. See if it will start with the old plug if you still have it. Now, as to the carb, did you touch anything on it? If not then I would check the fuel first. If there is water in the fuel or if the fuel is bad it will start and die. Now, then we get to the carb. Are you making sure to prime and choke the engine? If you don't prime and choke it it may start and die or take a lot of pulls to start. If all that is ok, then try a little carb cleaner, while your starting it spray a little into where it takes the air in (beginning of the carb). If it starts with that then your carb is just dirty or has bad jets. If it doesn't then the reeds, jets, or just about anything else could be really messed up, or it could just be so far out of adjustment. Unless you know what you are doing you really can't do anything about that by yourself, then you should take it to a small engine repair place (lawnmower repair?) and have them check it out.
 

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Discussion Starter #17
I got the right spark plug, I didnt touch the carb. Theres a little old gas in there but i'm trying to run that out clean. Where does the carb take air from? How can I adjust my govner linkage to make it go faster?>
 

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Do you see a box that says air filter, ir another little plastic box connected to where your throttle cable connects? One that if you open it there is a filter element? That is where you spray a little carb cleaner in, not too much though, just a little 1 or 2 second spray.
 

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Ahmadi6490 said:
I got the right spark plug, I didnt touch the carb. Theres a little old gas in there but i'm trying to run that out clean. Where does the carb take air from? How can I adjust my govner linkage to make it go faster?>
uh.. the top? and you want your throttle to open faster? Slam down your right foot and problem solved
 
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