[AT] Backpack leaf blower

[Stephen Offiler]

That piston looks pretty good for one that has been run without
lubrication, at least from this photo angle.  Dark area, combustion getting
past rings.  Are the rings or ring grooves damaged, stuck, crudded up,
whatever?

I have a little 2-stroke dirt bike experience but most of it was decades
ago.  When we had a piston seize (iron liners, unlike these new hard-plated
cylinders) there was scoring everywhere, cylinder and piston alike, and
rings would actually break sometimes -  and then, boy, you really had to
bore oversize (if you were lucky).  I guess these modern engines built with
different techniques are going to provide a different set of clues.  I'm
still surprised to see no scoring on the piston and the original machining
marks still obvious.

I'd almost be inclined to clean everything up very thoroughly, reassemble,
and see what happens.  Check ring end gap in the cylinder as you go along,
and maybe put in just a set of rings if they are out of spec.  However -
I'm not recommending this because you said it was difficult to
disassemble.  Your time is valuable.

Steve O.

On Wed, Dec 8, 2021 at 6:41 PM Mike M <meulenms at gmx.com> wrote:

> Hi Moe,
> Here's a shot of the piston and the retaining pin, not really sure how to
> get the pin out since the retaining clip appears to be a washer not a cir
> clip. I can order a new cylinder, piston, pin, washers and and gaskets for
> about $40, a lot cheaper than a new blower. Thanks for any advice anyone
> can offer.
>
> Regards, Mike M
>
>
> On 12/2/2021 6:39 PM, Moe Fretz wrote:
>
> So what's the cylinder inside look like?
> Can you save it?
> Husqvarna trimmer is well worth the repair costs.
>
> On Thu, Dec 2, 2021 at 3:11 PM Mike M <meulenms at gmx.com> wrote:
>
>> So I pulled apart my leaf blower today, and looked at the exhaust port,
>> as was suggested. Heavy scoring on the piston. So you were right, she ran
>> it with straight fuel.
>> Mike M
>>
>> On 11/27/2021 7:20 PM, Moe Fretz wrote:
>>
>> No, engine has experienced a lean seizure.
>> Lack of lube is another way to put it.
>> No quick fix.
>> The engine will need a piston and rings at the least.
>>
>> Pull off the muffler, look in at the piston, you’ll see the piston scored
>> on the exhaust side.
>> If you’re lucky the cylinder isn’t damaged, you’ll have to
>> pull the cylinder to check it.
>>
>> Used to do 15 or 20 of those every year.
>> One quick error, sometimes, can cost a lot of money.
>>
>> On Sat, Nov 27, 2021 at 15:33 Mike M <meulenms at gmx.com> wrote:
>>
>>> So my lovely wife was out blowing leaves the other day with my backpack
>>> blower, and it ran out of fuel. She mistakenly filled it with straight
>>> lawnmower gas, and after a bit it started to stumble and then quit. She
>>> came in to tell me about it and ask what the problem was. When I looked
>>> at the tank I noticed there was no blue tint in the gas, and I asked her
>>> what can she filled it from, and she pointed to the gas container I use
>>> for my zero turn. I told her that was straight gas, and she needed to
>>> use the 2 cycle mix, that is in another red 5 gallon can, honest
>>> mistake. She claims I told her to use that fuel, when I know I did not.
>>> I used it today and it will run for about 5 minutes and then sputter out
>>> and die, like it's running out of gas. It will restart, but then the
>>> same scenario starts all over again. Is their any chance of saving this
>>> engine? Maybe a higher oil/gas ratio? Thanks in advance.
>>>
>>> Regards,
>>> Mike M
>>>
>>> --
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>> --
>> Moe Fretz
>>
>> L’Orignal ON,
>> Canada
>>
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