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/diy/ - Do It Yourself

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2792697 No.2792697 [Reply] [Original]

I'm interested in learning mechanics and shit and working on cars. I've heard working on lawnmower engines is a good place to start. But I really don't know what I'm doing.
What am I supposed to do, take an old lawnmower off the side of the road and fiddle around with it until I've pulled it apart? Then what?
I'm guessing I'd want to try and fix broken ones. Anyway as I say I've got no idea what I'm doing and no idea where to start. Is there some guide out there that can hold my hand and tell me what to do?

>> No.2792700
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2792700

>>2792697
It’s all “Fuel, Air, Spark”. Start with that theory.

>> No.2792701

>>2792700
I... don't follow

>> No.2792703
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2792703

>>2792701
With any small engine, you just need to diagnose those 3 things, air, fuel, and spark.

Air is super easy, make sure the air filter isn’t clogged and there’s nothing jammed in there.

Spark, you can hold the spark plug against the block and pull the cord and see if it sparks. Or get an inline spark plug tester. If no spark, it’s either bad spark plug/wire, or the ignition coil, or whatever type of cutoff switch a small engine may have which cuts the ignition.

Fuel, try to start it on starter fluid. If she runs on starter fluid, you have a fuel delivery problem. Check the fuel lines, clean or rebuild or replace the carb.

It’s pretty much the same with cars except each one of those “Air, Fuel, Spark” systems has many extra parts and parameters that need to be met for it to work properly, like you have security interlocks before you get spark and electric fuel pumps and injectors. Find which system has the issue, and work through that system to find the culprit.

>> No.2792704
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2792704

>>2792697
>>2792701
It’s spring, look for somebody throwing out a weed whacker or blower or something. Grab it out of the trash, chances are they left old gas in there and gummed up the carb.

Get yourself a can of starter fluid and see if she runs on that. If so, you can grab a whole carb and fuel line kit for most of those small engines for $15-$25 off ebay/Amazon (pic related). Sometimes it’s as simple as a cracked fuel line or primer bulb because they get brittle over time and those are a couple bucks ar Ace Hardware. Then once you get it up and running, maybe you can sell it for $50 or use it yourself or give it away and be happy you learned to fix something.

>> No.2792708

>>2792704
>see if she runs

It's a goddamned machine, not your daughter.

>> No.2792715

>>2792708
Of course not. Anon isnt fucking the engine.

>> No.2792727
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2792727

>>2792708
That ol’ girl purrs like a kitten who just downed a whole can of tuna

>> No.2792748

>>2792703
>posts amazon package with a tracking number clearly visible
why do you keep doxing yourself faggot

>> No.2792763

>>2792748
Go there, enjoy an old boomer neighbor’s house

>> No.2793135

Just tear into shit that is broken and then fix it.