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[#] Mon Aug 06 2018 08:41:49 EDT from wizard of aahz

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Did you consider using the pressure washer to clean the parts?

[#] Mon Aug 20 2018 10:12:32 EDT from IGnatius T Foobar

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That would require two pressure washers, which I now have. The damn thing blew itself up again this weekend, right in the middle of my deck project.
I heard a pop and saw some smoke, the engine stopped, and now it won't start again. Despite my legendary frugality, I went out and bought an electric so I can keep working on the deck instead of spending the rest of the summer fighting with this engine.

Does anyone have any advice on how to troubleshoot a single-cylinder engine that, I suspect, keeps burning out spark plugs?

[#] Mon Aug 20 2018 11:47:47 EDT from pandora

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well, what do the spark plugs look like when you pull them out after it fails?


[#] Mon Aug 20 2018 13:19:19 EDT from IGnatius T Foobar

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The last one didn't appear to be fouled or burned externally. Cleaning and gapping it had no effect. I'll pull out the most recent one later and see if it is similar.

[#] Mon Aug 20 2018 13:37:37 EDT from pandora

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I wonder if maybe it's too lean, or something got stuck due to ethanol?

[#] Mon Aug 20 2018 14:05:52 EDT from wizard of aahz

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IG - A friend had a problem with power washer due to not getting enough throughput of water. But not sparks and smoke and stuff.

[#] Tue Aug 21 2018 09:03:37 EDT from Ragnar Danneskjold

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Is the piston moving?

[#] Tue Aug 21 2018 15:16:04 EDT from wizard of aahz

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The Turtle Moves!

[#] Wed Aug 22 2018 10:24:27 EDT from IGnatius T Foobar

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Is the piston moving?

I haven't disassembled it enough to check that yet ... but when I was trying to get it started again, I did notice that it turned unusually freely. I assumed that was just because it was already warmed up, but a broken rod might result in the same effect, right? When I have time I'll look.

[#] Wed Aug 22 2018 15:26:31 EDT from Ragnar Danneskjold

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Yeah, see if you have compression at all.......

[#] Wed Aug 22 2018 17:32:10 EDT from IGnatius T Foobar

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Ok, I removed the plug, probed the plug socket with a screwdriver, and gently pulled on the starter cord.  The screwdriver moved back and forth with the cylinder.  That would seem to indicate that the cylinder is not seized and the rod is not broken.

Here's a close up photo of the plug:

 



[#] Fri Aug 24 2018 13:29:08 EDT from Ragnar Danneskjold

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That doesn't mean you have compression. Put your finger over the hole while you pull the starter. If you don't have pressure, you've got a problem in the head or rings.

[#] Sat Aug 25 2018 17:09:18 EDT from IGnatius T Foobar

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It looks like you're correct. No air pressure coming out of the hole when I pull the starter. So if the cylinder is moving but there's no pressure, does that mean the rod is intact but something else is broken (head or rings etc) and air is blowing past the cylinder?

I'm assuming at this point that I've gone as far as I can without disassembling the engine block.

[#] Mon Aug 27 2018 13:22:54 EDT from LoanShark <>

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Yeah, sure, my rod is intact.

[#] Mon Aug 27 2018 14:26:46 EDT from Ragnar Danneskjold

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IG - exactly. Next test - put a little heavy oil in the cylinder and repeat the test. If you've got a little backpressure, it's probably rings. If not, valves.

[#] Mon Aug 27 2018 14:44:03 EDT from IGnatius T Foobar

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Yeah, sure, my rod is intact.

That's good for you, when things need to be piston.

[#] Mon Aug 27 2018 17:05:27 EDT from LoanShark <>

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*groan*

[#] Mon Aug 27 2018 20:07:11 EDT from wizard of aahz

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<high five to IG> I wish Yuri was here to grumble.

[#] Tue Aug 28 2018 15:25:07 EDT from pandora

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so punny.

[#] Fri Aug 31 2018 13:56:08 EDT from IGnatius T Foobar

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"He said I'd blown a seal. I told him to just fix the damn thing and leave my private life out of it."

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