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Old 05-29-2018, 06:59 PM   #31
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Re: Lawnmower is still dead


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Originally Posted by livnezsoon View Post
It's a new carb and look clean. I will open it up tomorrow and see if I have a stuck intake valve. I still have to try the oil in the cylinder trick that Guap0 suggested. Been raining on and off and wife and kids keeping me busy today. Hopefully I can try the oil trick and if that doesn't work, then open it up and look for stuck valve.

I was watching a YouTube video where the guy says the same thing happened to him and it was a stuck intake valve. I was thinking that it might make sense with the low compression. Will find out tomorrow.

Its been 4 days now and just checking on how the resurrection of the dead mower is coming along. Any promising news ?
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Old 05-30-2018, 07:24 AM   #32
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Re: Lawnmower is still dead


I think that you mean a stuck float valve/needle not the intake valve. If a float won't float, that would cause flooding. If something is stuck in the needle, you wouldn't get any gas at all. Usually. It still think that you just need to restore compression.
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Old 05-30-2018, 09:15 AM   #33
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Re: Lawnmower is still dead


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Originally Posted by Gregsoldtruck79 View Post
Its been 4 days now and just checking on how the resurrection of the dead mower is coming along. Any promising news ?
After doing some digging, my best guess is a head gasket. Valves move freely, very dirty, but are not stuck. Head gasket didn't look good, but I don't know if that was from me taking the head off. I have a new gasket arriving tomorrow and will see if that was the problem.

Still seems like I am missing something. Can a head gasket go on you during supper?

I guess maybe it just happened to go when I turned it off or something about trying to start it back up after supper did it. Not sure. I will know more tomorrow. Not one place I called happened to have the gasket needed in stock so I have to wait for it to arrive by mail.
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Old 05-30-2018, 09:19 AM   #34
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Re: Lawnmower is still dead


I doubt very much that you have a blown head gasket.
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Old 05-30-2018, 09:40 AM   #35
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Re: Lawnmower is still dead


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Originally Posted by Guap0_ View Post
I think that you mean a stuck float valve/needle not the intake valve. If a float won't float, that would cause flooding. If something is stuck in the needle, you wouldn't get any gas at all. Usually. It still think that you just need to restore compression.
All I know is that some of the videos I watched with low compression were due to the intake or exhaust valve stuck open. Mine seem to move freely and open and close as I would expect. I once thought is was the carb but a new one made no difference. I am hoping that the head gasket is the problem and try that when it arrives in the mail.

What I should have done was a compression test to see where the leak is. The kit should arrive with the gasket.
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Old 05-30-2018, 09:46 AM   #36
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Re: Lawnmower is still dead


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Originally Posted by Guap0_ View Post
I doubt very much that you have a blown head gasket.
I sure hope you are wrong as I don't know what my options are if the gasket doesn't help. I will do a dry compression test when the kit arrives in the mail. I removed the new carb and inspected it. Looks good. Made sure it was on nice and tight to ensure seal.

I found a place that has a replacement engine for a very good price. The store owner said he would hold it for me if the gasket doesn't work. This has cost me more than wanted but at least I have learned a lot.
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Old 05-30-2018, 04:49 PM   #37
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Re: Lawnmower is still dead


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You seem to have spark and fuel. I wonder if it is flooding.

Either too rich or too lean. Too rich and you should be able to smell the gasoline. Too lean and it should run for a few seconds if you put a little gas in the cylinder.
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Old 05-30-2018, 05:13 PM   #38
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Re: Lawnmower is still dead


Water in gas will give what looks like white smoke.
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Old 05-30-2018, 05:37 PM   #39
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Re: Lawnmower is still dead


Did you try to bring back the compression with a few drops of oil in the cylinder? I'm sure that's all it is.
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Old 06-01-2018, 06:16 PM   #40
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Re: Lawnmower is still dead


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Did you try to bring back the compression with a few drops of oil in the cylinder? I'm sure that's all it is.
Yes, I did. Maybe I didn't add enough as it didn't seem to help. I just received the new head gasket and will try that tonight or tomorrow morning.

There is a lot of carbon build up on the piston and intake and exhaust valve. Could that mean anything? I will try to scrap them clean. Any idea what to use to clean them? Carb cleaner maybe?
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Old 06-01-2018, 06:30 PM   #41
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Re: Lawnmower is still dead


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Originally Posted by livnezsoon View Post
Yes, I did. Maybe I didn't add enough as it didn't seem to help. I just received the new head gasket and will try that tonight or tomorrow morning.

There is a lot of carbon build up on the piston and intake and exhaust valve. Could that mean anything? I will try to scrap them clean. Any idea what to use to clean them? Carb cleaner maybe?
Using water check the valves for leakage before doing anything else to the head.
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Old 06-02-2018, 03:12 PM   #42
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Re: Lawnmower is still dead


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Using water check the valves for leakage before doing anything else to the head.
Was just getting ready to do that when I saw a problem. I could see light from the exhaust even with the valve closed. The valve looks fine. I don't see any problem with the shape, but I no expert.

I don't know if that means I need a new seat, valve or both. I still haven't figured out how to clean the carbon deposits off the valves. I know that I can't let anything get into the cylinder. Lightly scraping it with a putty knife doesn't seem to remove it. I don't know of any liquid to use.

I want to show the pic but can't upload as it wants a url.
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Old 06-02-2018, 04:03 PM   #43
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Re: Lawnmower is still dead


Either use imgur.com to upload pics & post the link here or try to upload it to your personal album on this site. Either way, I think that you went way to far. I don't think that there was any reason to pull the head.
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Old 06-02-2018, 04:10 PM   #44
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Re: Lawnmower is still dead


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Originally Posted by Guap0_ View Post
I don't think that there was any reason to pull the head.
He'll know when he flips the head upside down and puts about an eyedropper of water at the edge of the valves.
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Old 06-02-2018, 05:31 PM   #45
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Re: Lawnmower is still dead


I know that it was a long time ago but in his original post, he said that he stopped for dinner. All that didn't happen during dinner.
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