Echo PB580T backpack blower
- Thread starter Dsawyer44
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I can't get the blower to fire at all. I bought it used. It has spark,compression 90 lbs,fuel. I even put gas in after taking the plug out. I also checked the muffler for a blocked spark arrester. Any help will be appreciated. Thank you. The blower is only a year old.
Tiger Small Engine
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If you are using the correct compression tester with a Schraeder valve, then 90 psi is low for a 2- stroke. Pull the muffler and check condition of piston, rings, and cylinder.
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Probably been straight gassed. Check as Tiger suggests.
BTW the rule of thumb here is if the compression is below 100-110 psi it will not start. Need a tester with the correct Schrader valve at the end of hose at the cylinder; not at the gauge.
BTW the rule of thumb here is if the compression is below 100-110 psi it will not start. Need a tester with the correct Schrader valve at the end of hose at the cylinder; not at the gauge.
Auto Doc's
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Pull the plug and the crank start head and then rotate the motor by hand with the flywheel to see where the flywheel magnet meets the coil. It should be at top dead center as the magnet just meets the coil. If it is off by a little bit, the key is sheared.
Also try to start it with the muffler removed to make sure the muffler is not heavy with oil coking. You cannot see what is inside the muffler. I have had to heat a few mufflers with a torch red hot to burn them out before. Customers who make their own oil/fuel mix tend to get carried away with the oil.
If you can look in the muffler head hole and see piston scoring, it has been run on straight gas in most cases and will need a cylinder and piston kit.
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Question Auto. How do you see the flywheel?, since it is on the blower fan side of engine and it requires separating the backpack frame from the motor then fan box opened, the fan removed, and back half of fan box removed just get where you can see the flywheel. Even then you may not see the flywheel to coil
alignment.
Maybe some trick in the service manual.
alignment.
Maybe some trick in the service manual.
sgkent
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how did you test for spark? A plug can fire outside a cylinder but with compression fail. Were it me, I would buy a new fresh plug from a known good source and not Amazon. Then blow the cylinder out with compressed air to make sure it is not flooded. Pull it over a few times with the plug out, blow it out again THEN put a TINY amount of new gasoline in it thru the plug hole, put the new plug in gapped properly and see if it fires once or twice. Also, a plug can have spark when it screwed in but the center electrode be shorted to ground by carbon etc..
Keen@n777
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The woodruff key would have been shorn off rather than the keyway moved, that's just the autism in me refusing to stay silent, which while it does happen is less likely than the muffler being inundated with unburnt oil (which will typical present itself as the culprit by backfiring through the carb when trying to start it and the solution is like another poster said, take a torch to it and manually burn off the clog). To clarify another posters suggestion on checking the timing, with the recoil starter assembly removed you should have line of sight to the ignition coil, remove the spark plug and put a plastic drinking straw in the hole and now you have two visual identifiers for your piston position and it's relation to where the coil and the magnet on the fly wheel meet (the air intake fan on the other side of the engine is not your fly wheel). However my net would be that it's actually the ignition coil itself, either it needs to be re-gapped because it is too far away from that magnet when it passes and it's putting out a weak spark not strong enough to fire up yet it's meer presence when visually testing will make most move on thinking spark=good which is not always the case, or the coil has gone bad and needs to be replaced also check the insulation on the plug wire for cracks or damage that may allow spark to escape and if found wrap it with electrical tape. Hope whatever the case is, someone has made you aware of it and given the solution so that you have a running unit. If it does have too weak of compression and you don't want to throw more$$ at it to TRY getting it running again, remember that you can get some of your money back by selling the good parts on eBay.