It is in the manuals that come with them. Perhaps you didn’t read them?
We have a backpack leaf blower.
It does a good job and we just blow the leaves into the forest. I’m not certain of the motor size.
Actually this is true.
You’d change the spark plug
Clean off spark arrester .
Maybe blow out dirt in motor with an air compressor.
Stuff like that.
They are outrageously noisy. 
We wear ear muffs.
update
I honesty thought that this machine was due for the scrap heap. Could not get it started. So tinkered around with it and did the necessary pre start routine. that is removing the spark plug and giving it a couple of pulls on the chord to clean the carburettor etc and it started
Sounds a lot of effort just for a bit of a blow job 
Doesn’t a leaf blower just deposit the leaves somewhere else and as soon as the wind blows, they all come back?
I rake them up with my spring rake and bag em…They don’t usually climb out of the bin even when the wind blows…
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You are correct Foxy, what is going on here is all about the FOMO’s and devices, no stoppin this now.
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Forever Autumn 
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Still not over happy with the leaf blower, it runs fast then slow, so made the decision to update So have on order a 4 stoke honda leaf blower. no more trying to get the fuel mix right and is quieter as well
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Honda make good engines, my first motor bike was a Honda fifty…
If the leaf blower is crap, at least you could have a day out at the seaside on it…
I’m going all electric, it is so much quieter…
Perhaps not my mower and my whipper snipper (at least, not yet)
Can’t be doing with rechargeable stuff unless I have to. My mower plugs into the mains, as does my vacuum cleaner for the car and workshop. For proper man size jobs I prefer my mains electric drill, it’s always ready for use. Mrs Fox’s general purpose vacuum cleaner is rechargeable (her choice) and with all the other recharegeable stuff there’s hardly a socket in the house that doesn’t have something recharging in it… 
I used to be that way but now I never use my mains powered equipment. The battery stuff is ready to go at a moments notice anywhere with no trailing leads getting in the way.
My mains powered router, drills, circular saws, are never used at all, I even have a battery powered chainsaw which I used yesterday to lop some trees. The only battery powered tool I don’t have is an angle grinder but these days I rarely use it anyway.
My grass cutting is all petrol,powered though and my vacuum cleaner is mains though I prefer my carpet sweeper which doesn’t need any power.
I have a couple of 5Ah batteries, a 3Ah and a 1.5Ah. They make ideal gifts to suggest to relatives who are at a loss for what to give you. The batteries last a remarkably long time before they need charging again
If I had known that I was going down this path I would not have originally bought a Makita drill because Makita stuff is expensive and more suitable for tradesmen. We happy amateurs would be better off with Ryobi at half the price… The problem is that you are stuck with a battery system (though you can buy adapters now)
Over the years I have accumulated:
Drill
Impact driver
Multi tool
Reciprocating saw
Circular saw
Chainsaw
Blower
Router
All 18v Makita, basically everything I ever need . I do have a mains powered compound mitre saw in the shed.which is very handy.
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update on small petrol engines
I had this problem with my 2 stroke engine and now with the new 4 stke engine.
First of all why get a 4 stroke engine? the reason is there is no need to make a percentage mix of oil and petrol to get it to work.
Now what seems to be an issue with all small petrol engines is running the engine for a short time , full throttle it cuts out, but not when idling.
The problem lies with the fuel intake " black rubber "pipe from the petrol tank to the carburetor. When the engine is idling and cold no problem, but a competely different matter when hot
the “rubber” pipe goes very soft, and with the vacuum needed to draw the fuel into the carburetor, the rubber pipe now soft it collapses inside causing a blockage. strangely enough the return pipe from carb to tank is plastic
The solution is to swap this ruber pipe for a proper clear plastic pipe instead. one thing to watch out for the the pipe bore hole size as they can vary.
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just ordered this air filter for my leaf blower. The only places that sells them is in China. the existing one in my machine is 11 years old
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Good to see this thread hasn’t “Run out of Puff” yet.
Ok put my engineering brain part into use and fixed the problem
,This was all to due to not getting enough fuel into the carbaretta.
With the fuel tank out the easiest way the removed the fuel lines, the problem was two fold. First fuel line short and filter too small
One other thing I considered was weighing down the fuel line so it stayed at the bottom of the tank.
to this end I resorted to my old fishing gear and a small lead plumb weight
bit smaller than one below
also had a larger filter kicking around so used that.
So I drilled a hole in the lead weigh larger enough to hold the fuel line down to the bottom of the fuel tank
so now with a proper lenght of fuel line weight down test time/ Now the leaf blower runs as it should
Two stroke engines are often tricky to start. The trick with my strimmer is to get it all ready, try a couple of test pulls on the cable and then sit it in the sun for an hour or two. Starts perfectly after that. Similar problem with my chain saw - except harder to start. The “never fail” technique appears to be to bring it indoors from the shed overnight and it starts fine the next morning.
I think in both cases its due to moisture in the engine which builds up if its in a cold shed and not started for a while.
just added the new air filter and now it is so powerful it even pushes back when holding it. I had forgotton hnow good this machine was
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