Accidentally ran straight gas in a trimmer engine.

herricjbJuly 18, 2013

This isn't a mower question but I've had such good luck getting help with my mower in the past here, I thought you would probably know what to do with another small engine.

I goofed up. I accidentally put straight gas in my Shindaiwa trimmer. It ran a few minutes then stopped and wouldn't start. That's when I realized what I had done. The piston has seized up (it wouldn't pull to start).

Is there anything I can do?

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skane1(3)

Hi....
I'd remove the sparkplug and put some 2 cycle oil directly into the cylinder and leave it for a 24hrs.
Hope this helps.

    Bookmark   July 18, 2013 at 2:45PM
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baymee(LehighValleyPA)

Sometimes you can free up the piston with penetrating oil. Try to turn the crank in reverse, using whatever you need to do it. Sometimes this works.

    Bookmark   July 18, 2013 at 4:40PM
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herricjb

Thanks. How would you turn it in reverse?

    Bookmark   July 18, 2013 at 4:42PM
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baymee(LehighValleyPA)

You could remove the head or maybe by just using a wooden dowel and hammer and with someone applying reverse force on the crank, gently tap the piston. Might take a few tries.

    Bookmark   July 18, 2013 at 7:37PM
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1saxman

Sometimes they will move after cooling. There is probably some cylinder/piston scoring but it might run again.

    Bookmark   July 21, 2013 at 3:58PM
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herricjb

I used penetrating oil and a hammer and dowel to get the piston moving. It's currently soaking in 2-cycle oil. I plan to rinse out that oil with the correct gas/oil mix and give it a try at starting. Wish me luck!

    Bookmark   July 26, 2013 at 11:26AM
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baymee(LehighValleyPA)

waiting

    Bookmark   July 26, 2013 at 12:54PM
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herricjb

Sorry I didn't get back earlier on this. Much appreciation to everyone. I was able to free it up and it seems to be working the same as always. I just used a penetrating oil as suggested, tapping the cylinder lightly with a wooden dowel every day. It freed up in about a week.

    Bookmark   August 20, 2013 at 11:07AM
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andyma_gw

Heh heh you didn't do it any favors but, you rescued it and it will do fine. Thanks for the follow up

    Bookmark   August 21, 2013 at 3:42PM
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