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An expert who has answered 20 questions.
Re: Honda 4 stroke petrol leaf blower.Petrol starvation
Further to the previous response of checking for bent fuel lines. It sounds like the breather is faulty, this is integrated in the fuel cap, as you screw it down the rubber/cork gasket makes a tight seal preventing spillage but the breather allows for neutral pressure inside the tank, with fuel being sucked out it creates a negative pressure in the tank or a vacuum causing the engine to be starved of fuel as it can't draw more fuel. Check the cap for dirt or grime and possibly give it a good rinse in benzine before trying again, otherwise try and get a replacement cap. Hope this helps.
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If its a hand held Vac/Blower then I don't know of any that aren't 2 stroke.
Your part number isn't much help, you're welcome to post a picture of it. As I say, if its handheld and petrol then it will be a 2 stroke. Mix ratio is generally 50:1 That's 100ml of oil in 5L of petrol. Some manufacturers use a ratio of 40:1 which if used in the wrong machine can seize the engine, doing more damage, so stick to the 50:1 ratio to be on the safe side.
The biggest problem with any petrol/petroil equipment is the gae of the fuel. petrol is hrgoscopic, when means that it tends to attract moisture. The biggest problem with petroil equipment is usually where the fuel tank is not drained after use, so when you come to use it the tank apears empty as the petrol has evaporated leaving only the oil which blocks the carburettor and gives a doubly rich mixture. Water in the fuel is usually easy to analyseas when running the equipment will have a really uneven tickover, sort of accelerating and then decellerating as if it's running out of fuel. As an earlier blog, drain the tank, wash it out, spray quick start into the air intake and she should start and remeber when finished empty the petrol tank into a container specifically for two stroke.
A 4 stroke motor does NOT have Oil in the Fuel. There is NO fuel mixture. Just use regular gas. The only place you need oil is in the sump, and regular 20/30 motor oil will be fine.This only needs to be replaced when low on dipstick in crankcase.
if this is a brand new I would ask is the gas oil mixture fresh and of the proper ratio. most use 40-1 if this is not brand new look and see if the muffler could be clogged up. a common problem is the spark arrestor screen gets clogged up with carbon deposits.