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Old 05-25-2018, 05:27 AM   #16
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Re: Lawnmower is still dead


And in the heyday of troubleshooting, also be sure the engine "stop" mechanism had not been accidently engaged unknowingly. Usually the engine is killed by grounding out the ignition coil .

Sometimes done through a "on/off" electrical switch or maybe even a sliding cable that grounds out the coil wire when the safety "deadmans" handle is released . A switch may fail closed or a cable be slipping and not disengage the coil ground. If the coil's engine "stop" wire is grounded...engine is not starting no matter what is done.
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Old 05-25-2018, 05:37 AM   #17
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Re: Lawnmower is still dead


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Originally Posted by Gregsoldtruck79 View Post
And in the heyday of troubleshooting, also be sure the engine "stop" mechanism had not been accidently engaged unknowingly. Usually the engine is killed by grounding out the ignition coil .

Sometimes done through a "on/off" electrical switch or maybe even a sliding cable that grounds out the coil wire when the safety "deadmans" handle is released . A switch may fail closed or a cable be slipping and not disengage the coil ground. If the coil's engine "stop" wire is grounded...engine is not starting no matter what is done.
3) reply #8 but probably not worded correctly. This is why I usually remove the grounding wire at the engine which eliminates all that safety crap.
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Old 05-25-2018, 06:23 AM   #18
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Re: Lawnmower is still dead


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3) reply #8 but probably not worded correctly. This is why I usually remove the grounding wire at the engine which eliminates all that safety crap.
I see SS. my bad. But I read your line 3 in post 8 as part of a safety measure before cranking the engine. My post is addressing the engine kill method possibly being the problem.
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Old 05-25-2018, 06:33 AM   #19
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Re: Lawnmower is still dead


I never measured it but a few drops of oil are fine. I always used a squirt can. The guy who taught me that trick in 1969 liked to put the plug(s) back in the engine when cranking it. It's has always worked for me without doing that. Either way it should restore your compression. Then with a new plug, it should start. Make sure that the crankcase is full also & that the oil doesn't smell of gas.
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Old 05-25-2018, 08:32 AM   #20
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Re: Lawnmower is still dead


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Originally Posted by Gregsoldtruck79 View Post
And in the heyday of troubleshooting, also be sure the engine "stop" mechanism had not been accidently engaged unknowingly. Usually the engine is killed by grounding out the ignition coil .

Sometimes done through a "on/off" electrical switch or maybe even a sliding cable that grounds out the coil wire when the safety "deadmans" handle is released . A switch may fail closed or a cable be slipping and not disengage the coil ground. If the coil's engine "stop" wire is grounded...engine is not starting no matter what is done.
That was one of the first things I tried.
To rule out that issue, I removed the ground from ignition coil. Didn't help any. I have to be missing something. It worked fine until I ate supper. I cannot see how eating supper can kill a lawnmower. Maybe my lawnmower is trying to scare into fasting so I can lose a couple ...dozen pounds. LOL
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Old 05-25-2018, 08:41 AM   #21
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Re: Lawnmower is still dead


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Originally Posted by Guap0_ View Post
I never measured it but a few drops of oil are fine. I always used a squirt can. The guy who taught me that trick in 1969 liked to put the plug(s) back in the engine when cranking it. It's has always worked for me without doing that. Either way it should restore your compression. Then with a new plug, it should start. Make sure that the crankcase is full also & that the oil doesn't smell of gas.
Thanks for the suggestion.

It has finally stopped raining so I will give the ground an hour to dry up and then give it a try.
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Old 05-25-2018, 10:42 AM   #22
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Re: Lawnmower is still dead


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I forgot to drain the gas over the winter so I hooked up my vac and sucked it all out.
Using a vacuum cleaner to suck up gasoline is extremely hazardous.
It is a great way to start a fire.
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Old 05-25-2018, 11:39 AM   #23
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Re: Lawnmower is still dead


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Using a vacuum cleaner to suck up gasoline is extremely hazardous.
It is a great way to start a fire.
I wasn't sticking the vac hose in to suck out the gas. There are vac attachments that allow the suction from the vac to pull the gas out of the lawnmower and into a portable gas tank. They are made specifically for this purpose. Gas does not come in contact with the vac. You should check them out. They are safe and save a lot of time and mess.
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Old 05-25-2018, 12:18 PM   #24
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Re: Lawnmower is still dead


Make sure that there is a good connection between the plug and the plug wire.

My story and the reason I say that.


My son brings over his mowers, two of them, for me to fix. I hate messing with lawn mowers but he is not very mechanically inclined.

I pull the plug on the first one, clean and gap it. I pour a little gas in the plug hole, reinstall the plug and it starts and runs for about 5 seconds. I remove the carb and sit it in the carb cleaner over night. I reinstall the card and it starts on the first pull.

OK, I am big success, I move on to the second one.

I pull the plug and it looks OK. I pour a little gas in the plug hole and reinstall the plug. It also starts and runs for about 5 seconds. I remove the carb and let it sit in the carb cleaner for a couple hours. I pull the starter rope several times, nothing. I pour some gas down the throat of the carb, nothing. Now I know that this thing at least fired a little while ago. I am about to pull the plug so I can pour gas in the plug hole. I notice that the plug wire doesn't feel quite right. I see a little white powder on the porcelain of the plug. I remove that and notice that the clip of the wire looks a little big. I squeeze it a little with the channel locks and now it fits firmly.

One pull and it starts right up.

Something like a loose plug wire would be intermittent enough to fit your symptoms.
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Old 05-25-2018, 01:10 PM   #25
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Re: Lawnmower is still dead


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Make sure that there is a good connection between the plug and the plug wire.

My story and the reason I say that.


My son brings over his mowers, two of them, for me to fix. I hate messing with lawn mowers but he is not very mechanically inclined.

I pull the plug on the first one, clean and gap it. I pour a little gas in the plug hole, reinstall the plug and it starts and runs for about 5 seconds. I remove the carb and sit it in the carb cleaner over night. I reinstall the card and it starts on the first pull.

OK, I am big success, I move on to the second one.

I pull the plug and it looks OK. I pour a little gas in the plug hole and reinstall the plug. It also starts and runs for about 5 seconds. I remove the carb and let it sit in the carb cleaner for a couple hours. I pull the starter rope several times, nothing. I pour some gas down the throat of the carb, nothing. Now I know that this thing at least fired a little while ago. I am about to pull the plug so I can pour gas in the plug hole. I notice that the plug wire doesn't feel quite right. I see a little white powder on the porcelain of the plug. I remove that and notice that the clip of the wire looks a little big. I squeeze it a little with the channel locks and now it fits firmly.

One pull and it starts right up.

Something like a loose plug wire would be intermittent enough to fit your symptoms.
Always good advice.

I thought that was the problem at one point in time. I installed the new Ignition coil and nothing. so I have the lawnmower taken apart and my wife asked if the wire could be loose. I grab it and boot and push hard to show that it is connected and then hear the click. Thinking that I just didn't have a good connection, I reassembled the lawnmower and tried again. It didn't start but the spark was clearly visible when I did a spark plug test afterwards.

I have tried all wire connections. I am guessing that the low compression is the problem. I am about to run to the store and get some oil. Spent 2 hours trying to find one I know I have here somewhere, but think I have wasted enough time. Time to go get more.

Hopefully adding a couple of drops will restore compression. Otherwise, I have lots of YouTube videos to watch on how to repair compression issues in lawnmowers.

So far I have about $200 on parts and nothing. The ignition coil alone cost $100 for this model. Crazy.

I guess I should not have stopped for supper. At least then the whole yard would have been cut. LOL
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Old 05-25-2018, 02:24 PM   #26
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Re: Lawnmower is still dead


What about the gas you are using.


Things like compression, coils and such don't happen while you eat dinner. Not unless you have a very, very long dinner.


I was once trying to fix a friend's mower. Finally gave up. Took it to the shop. Mechanic called me and ask if I had any kerosene around.



Yes, I was rebuilding a truck engine in her garage. I had some kerosene in a gasoline can. She didn't know it was kerosene and used it.


My bad.
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Old 05-25-2018, 03:39 PM   #27
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Re: Lawnmower is still dead


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What about the gas you are using.


Things like compression, coils and such don't happen while you eat dinner. Not unless you have a very, very long dinner.


I was once trying to fix a friend's mower. Finally gave up. Took it to the shop. Mechanic called me and ask if I had any kerosene around.



Yes, I was rebuilding a truck engine in her garage. I had some kerosene in a gasoline can. She didn't know it was kerosene and used it.


My bad.
I wish it was that, but no.

Before starting it for the first time, I realized that I didn't drain the old gas. I used a safe and clean method of draining the gas that utilized multiple hoses with one that attaches to the shop vac. It uses the suction of the vac to pull the gas from another hose that is in the gas tank and then places it into a portable gas container.

I then went to the gas station and put 5 litres in the portable lawnmower gas container and filled my van at the same time. There were 3 choices of gas with 87,89 and 91. I used 89 for both the van and the lawnmower gas container. It started 3 pulls and ran great. I only turned it off when my wife called me in for supper. Nothing to indicate there was a problem. The grass was longer as it was the first time using it this season. It had no problem going through it. No weird sounds or movements. Just dead when I tried to start it up again after supper. You know you are getting fat when even your lawnmower refuses to start after you eat. LOL

Could it be that I should have used the cheaper 87 octane?
Neither the van nor the lawnmower complained before about using better gas, but like I said, my expertise with a small engine is not impressive.
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Old 05-25-2018, 03:48 PM   #28
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Re: Lawnmower is still dead


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my expertise with a small engine is not impressive.
Neither is mine.


As some one else suggested make sure that the kill switch is not activated.



You know you have a spark at the present time. Then the problem must be gas. You said that you changed the carburetor. I would put the old carb back on and try it. Maybe you had a spark problem and fixed it and now have a gas problem.
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Old 05-25-2018, 06:44 PM   #29
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Re: Lawnmower is still dead


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



Just a shot in the dark: Take the bowl off the carburetor (round thing at the bottom - it will have gas in it). Inside you will see the float - it hinges, or is supposed to, up and down via a pin attached to the carb body. The float moves up and down to control the level of fuel by opening and closing a small needle valve located up near the hinge. If all seems to move freely, put a short piece of hose/tubing on the carb's fuel inlet (or you lips - yuk) and gently blow in. You should be able to blow some air in when the float is down but not when you hold it up with you finger.
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Old 05-25-2018, 07:27 PM   #30
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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.



Just a shot in the dark: Take the bowl off the carburetor (round thing at the bottom - it will have gas in it). Inside you will see the float - it hinges, or is supposed to, up and down via a pin attached to the carb body. The float moves up and down to control the level of fuel by opening and closing a small needle valve located up near the hinge. If all seems to move freely, put a short piece of hose/tubing on the carb's fuel inlet (or you lips - yuk) and gently blow in. You should be able to blow some air in when the float is down but not when you hold it up with you finger.
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.
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