lane
Collector wannabe
Posts: 10
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Post by lane on Apr 22, 2023 9:17:21 GMT -5
Hey All, just picked up a Super EZ, i think 1973 model. It seems to be in great shape, piston/ cylinder in good shape, good compression, has spark, cleaned out the carb, fresh gas etc… sounds healthy when i pull it, but just will not start, won’t even try. If I take the spark plug out i can see it sparking, after a few pulls gas bubbles out of the exhaust port… thinking maybe it’s flooding and or the fuel isn’t atomizing? But the carb seems perfectly clean. Not particularly experienced with 2 strokes so not sure what to do next Attachments:
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Post by onlyhomelites on Apr 22, 2023 9:39:32 GMT -5
Welcome to HOH! A couple possibilities...the flywheel key could be sheared which would alter the timing. You could also have a weak condenser or coil that will not fire under compression. Spark needs to be able to jump 1/4" out of the cylinder; you can make an easy tester by using an old spark plug with the ground strap removed. Hold the plug 1/4" from the saw CAREFULLY while cranking; if spark is observed jumping the 1/4", the system should be good and I'd move onto checking the flywheel key.
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Post by edju1958 on Apr 22, 2023 9:39:41 GMT -5
Two things come to mind - first the plug may not be firing under compression.Try a new plug first.If that doesn't work then the condenser can be weak & might need to be replaced.The saw should at least "pop".You'll have to determine which ignition system you have on the saw,it'll be either a Wico or Phelon,& that will be imprinted on the flywheel. Lol,looks like Leon beat me to it by seconds.
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lane
Collector wannabe
Posts: 10
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Post by lane on Apr 22, 2023 10:14:45 GMT -5
Welcome to HOH! A couple possibilities...the flywheel key could be sheared which would alter the timing. You could also have a weak condenser or coil that will not fire under compression. Spark needs to be able to jump 1/4" out of the cylinder; you can make an easy tester by using an old spark plug with the ground strap removed. Hold the plug 1/4" from the saw CAREFULLY while cranking; if spark is observed jumping the 1/4", the system should be good and I'd move onto checking the flywheel key. Thanks! I >think< the key is okay? The magnet part seems to be synchronized with TDC. I will double check that, and the spark though. Thanks for the advice
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lane
Collector wannabe
Posts: 10
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Post by lane on Apr 22, 2023 10:16:06 GMT -5
Two things come to mind - first the plug may not be firing under compression.Try a new plug first.If that doesn't work then the condenser can be weak & might need to be replaced.The saw should at least "pop".You'll have to determine which ignition system you have on the saw,it'll be either a Wico or Phelon,& that will be imprinted on the flywheel. Lol,looks like Leon beat me to it by seconds.
Thanks I will check on this. Do you have to remove the flywheel to change the condenser? I took the little magneto part out and cleaned it, but seemed like condenser wire ran back behind?
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lane
Collector wannabe
Posts: 10
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Post by lane on Apr 22, 2023 10:27:28 GMT -5
Here is a picture of the flywheel. Seems like it is Wico, don’t know if that’s helpful for anything. Not home at the moment but will check the spark again when I am Attachments:
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Post by edju1958 on Apr 22, 2023 17:13:22 GMT -5
Yes,the condenser is under the flywheel.You may need to pull the FW if the condenser is weak.There's another option that you have & that's to eliminate the points & condenser altogether with an electronic chip,but first things first with trying a new plug.I'll be checking in to see what's going on.
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lane
Collector wannabe
Posts: 10
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Post by lane on Apr 22, 2023 19:25:13 GMT -5
Yes,the condenser is under the flywheel.You may need to pull the FW if the condenser is weak.There's another option that you have & that's to eliminate the points & condenser altogether with an electronic chip,but first things first with trying a new plug.I'll be checking in to see what's going on. It has this new spark plug but i think it’s incorrect Attachments:
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lane
Collector wannabe
Posts: 10
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Post by lane on Apr 22, 2023 19:41:24 GMT -5
Any tips for getting the flywheel off? I do not have a puller. If i turn the flywheel by hand it will not spark
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Post by ronaldt on Apr 22, 2023 20:08:10 GMT -5
Just curious if you squirted a little premix in the carb or directly down the cylinder (through the plug hole) to try to get it to fire? Sometimes they need a bit of persuasion to pull fuel from the tank.
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lane
Collector wannabe
Posts: 10
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Post by lane on Apr 22, 2023 20:13:52 GMT -5
Just curious if you squirted a little premix in the carb or directly down the cylinder (through the plug hole) to try to get it to fire? Sometimes they need a bit of persuasion to pull fuel from the tank. Yes, fuel is coming through and bubbling out the exhaust port. Thinking maybe it’s ignition and trying to get the flywheel off now
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Post by edju1958 on Apr 22, 2023 21:11:41 GMT -5
The spark plug should be a Champion DJ6J or equivalent.
As for removing the flywheel,there are a couple of different approaches to do so.You can loosen the nut on top that holds the flywheel onjust so it's flush with the crankshaft & put a drift pin on the nut & crank & give it a good rap with a hammer.This may take several tries & a bit of penetrating oil.A heat gun can be used too,but you must be careful with the heat due to the crank seal under the flywheel.The other method is to make a puller,but you'll have to take the pawl studs out along with the pawls & springs & washers. Just to give you a heads up on how stubborn the flywheel removal can be,I had an SEZ given to me a few yrs.ago & I heat & beat that thing till I was blue in the face & got nowhere with it.About 2 weeks later I came back & gave it a good rap & it finally came off.The engine was toast,piston was severely scored,not from the removal process.
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Post by tangobravo on Apr 22, 2023 22:49:17 GMT -5
A quick caveat on flywheel removal: It is a near certainty to cause damage to the flywheel when not using an appropriate puller. A puller can be fabricated from a piece of 1" or so strap steel (1/8-3/6" thick that spans between the pawl studs.) Drill holes for the studs in the strap and thread on nuts onto the pawl studs. A center drive bolt in the strap with a 3/8" fine thread bolt will allow you to press on the crankshaft end to load the puller. The wheel will likely NOT draw off-- it actually SNAPS loose. You will have to load the draw bolt, then tap on the end to snap the wheel loose. Penetrating oil a day or so earlier is a good friend to help to remove. Don't try to remove the pawl studs-You can't thread a common bolt into the flywheel, the threads on the studs that go into the wheel are some kind of wood-screw type coarse threads. Take time to remove the flywheel carefully, with an appropriate tool, and avoid damage to your saw.
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lane
Collector wannabe
Posts: 10
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Post by lane on Apr 23, 2023 0:05:34 GMT -5
A quick caveat on flywheel removal: It is a near certainty to cause damage to the flywheel when not using an appropriate puller. A puller can be fabricated from a piece of 1" or so strap steel (1/8-3/6" thick that spans between the pawl studs.) Drill holes for the studs in the strap and thread on nuts onto the pawl studs. A center drive bolt in the strap with a 3/8" fine thread bolt will allow you to press on the crankshaft end to load the puller. The wheel will likely NOT draw off-- it actually SNAPS loose. You will have to load the draw bolt, then tap on the end to snap the wheel loose. Penetrating oil a day or so earlier is a good friend to help to remove. Don't try to remove the pawl studs-You can't thread a common bolt into the flywheel, the threads on the studs that go into the wheel are some kind of wood-screw type coarse threads. Take time to remove the flywheel carefully, with an appropriate tool, and avoid damage to your saw. Thanks for the advice i’ll see what i can come up with.
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Post by tangobravo on Apr 23, 2023 10:42:03 GMT -5
Check this video by the "Wizard of Homelite" himself for what to expect when removing the typical Homelite flywheel. They all seem to behave this way. Leon of course has a nice factory tool that is impossible to find. The handle length makes it MUCH easier to use, but would be difficult to fabricate one like it! A simple strap type will be easy to make and will work well too. Just CAREFULLY get hold of the flywheel/ fins to tighten that center bolt some. Check the 16-17 minute time range: www.youtube.com/watch?v=dGTQWcJ-6z0NOTE: Some flywheels MAY have standard threads where the pawl stud goes in, and could then use a bolt to attach the puller.
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lane
Collector wannabe
Posts: 10
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Post by lane on Apr 23, 2023 10:50:24 GMT -5
Check this video by the "Wizard of Homelite" himself for what to expect when removing the typical Homelite flywheel. They all seem to behave this way. Leon of course has a nice factory tool that is impossible to find. The handle length makes it MUCH easier to use, but would be difficult to fabricate one like it! A simple strap type will be easy to make and will work well too. Just CAREFULLY get hold of the flywheel/ fins to tighten that center bolt some. Check the 16-17 minute time range: www.youtube.com/watch?v=dGTQWcJ-6z0Thanks I appreciate it. I dont have a tap to fabricate one with a threaded center but i’ll see what i can come up with, probably have something around the garage
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Post by tangobravo on Apr 23, 2023 12:58:39 GMT -5
My homemade puller for what its worth- I used long threaded nuts that slide back and forth in the arms of the puller.
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Post by tangobravo on Apr 23, 2023 13:03:17 GMT -5
Another pic to see how I did it.
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lane
Collector wannabe
Posts: 10
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Post by lane on Apr 29, 2023 11:55:11 GMT -5
Thank you, what thread coupling nuts do i need to make this?
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Post by tangobravo on Apr 29, 2023 12:26:03 GMT -5
I found the deep threaded extra-long nuts some time ago, and then found a way to make a puller to get the flywheel off. May be from an ACE hardware that had a big selection of hardware.
Main point is you need a puller to get the flywheel off. You may need to get one from a supplier. Might check ebay for a seller. Or have someone with an appropriate puller remove it for you.
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