[AT] Backpack leaf blower

Mike M meulenms at gmx.com
Sat Dec 11 13:40:32 PST 2021


Hi Steve, the last rings I played with was from a Farmall H I rebuilt in
the 90's. The only 2 cycle oil I use is the Stihl silver bottle. The
only reason I tried to remove them, is that they wouldn't rotate
smoothly using an awl. I thought that maybe there was crud in the groove.

Regards,
Mike M

On 12/11/2021 7:08 AM, Stephen Offiler wrote:
> Hi Mike:
>
> Sounds like a reasonable conclusion.  Between getting work done with a
> new one, and farting around experimentally with the old one, you made
> the call that's right for you.
>
> Have you played around with piston rings much in the past? They are
> quite brittle to begin with. I'm not sure whether overheating would
> make them even more  brittle, but, maybe.  I think if they were
> seriously affected by heat, they might be discolored too.
>
> Another good call with concern about other internals. Specifically,
> bearings.  Mains, conrod, and piston pin are all lubricated by that
> tiny bit of oil that's carried in with the gas mix.
>
> Hey,  while we're here, I'll put in a plug for synthetic 2-stroke
> oil.  I am a Stihl guy (Stihl vs Husky is like JD vs Farmall or Ford
> vs Chevy!) and Stihl packages 2 different products.  Little orange
> bottles are the regular, "perfectly OK" stuff, and for more money you
> get silver bottles with the synthetic oil.  I use silver bottles. 
> What I have noticed over time is that (a) the gas doesn't go stale (b)
> very little smoke or smell (c) I have never, and I am not
> exaggerating, NEVER purchased a spark plug.  I've got a saw that's
> probably about 15 years old now, a weed whacker must be going on 20,
> and a hedge trimmer that I got at auction, who knows how old.
>
> Best regards,
> Steve O.
>
> On Fri, Dec 10, 2021 at 1:50 PM Mike M <meulenms at gmx.com> wrote:
>
>     I did tear it down further and removed the piston, When i tried to
>     remove the upper piston ring it snapped and was very brittle, I
>     assume from over heating. I bought a new blower, the exact same
>     model, and will keep the old one as a parts machine. One concern I
>     had with just replacing the jug and piston, is I don't know what
>     internals might be damaged.
>
>     Regards,
>     Mike M
>
>     On 12/9/2021 7:59 AM, Stephen Offiler wrote:
>>     Hi Mike:
>>
>>     I didn't get any picture with this note.  Maybe it got stripped
>>     due to excessive image size? There's a limit.  I think below
>>     around 350K (working from memory) is good to go.
>>
>>     Steve O.
>>
>>     On Wed, Dec 8, 2021 at 7:26 PM Mike M <meulenms at gmx.com> wrote:
>>
>>         Hi Steve,
>>         Here's a better picture of the scoring, this piston is
>>         literally the diameter of a silver dollar. my reason for the
>>         first pic was to figure out how to get the piston pin out. I
>>         may have to send this in separate posts.
>>
>>         Thanks,
>>         Mike M
>>
>>         On 12/8/2021 6:40 PM, Mike M 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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