I have a JD 55v made by Echo. I have owned it since new - in 1983.It has been an excellent saw. It has developed ignition problems and the John Deere dealer doesnt seem to be able to get parts for it. A few years back I replaced the points and condensor with one of those little modules due to parts unavailability. Now it appears I need a coil. Does anyone know which Echo model this saw would be ? I may be able to still get the needed part from an Echo dealer, but they cant match up to the JD number.
- Thread starter JK-NY
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oliver power
Member
Yes, it was the model 650 (don't remember the letters). My uncle still has the saw, should you want me to verify the letters. The 650 I had was a single cylinder engine, and was the identical saw to the John Deere 55V. I do believe the echo has electronic ignition. Now, shortly afterwards, Echo came out with a two cylinder 650. They were on the market at the same time. Make sure you get parts for the single cylinder one, should there be any difference.
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Dougman8382
Guest
I’m having to replace the stater coil on the same saw. It was bought in 1983. Some of the parts say 1979. JD 55v. The coil has no resistance and the secondary has to much resistance. Did you ever find the part? I know it’s made by Echo but none of the suggestions on this thread have helped me out. Any help is welcomed.
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wore out
Well-known Member
You need to be checking the coil primary with the Ohmmeter set to the 200 Ohm range, NOT the 200,000 ohm range, as the coil primary resistance is only an Ohm or two. As to secondary resistance, I don't have a "spec" for your saw, but 8780 Ohms is within the range of similar coil and breaker point ignitions I found.
'Most any coil primary would appear the be shorted when checked on the 200K range on your Ohmmeter .
An even more reliable test would be to have a small engine shop equipped with a coil tester (Merc-O-Tronic) check it.
I'm NOT saying the coil may not be "bad", just that using an Ohmmeter set to the 200K range to check the primary proves NOTHING.
Set your meter to the 200 Ohm range, touch the leads together and note the reading, then measure the primary resistance again, subtracting the reading you got when you touched the leads together and let us know what it reads.
Also, be aware that a coil that is within published Ohms "specs" can be "bad" if only a "turn" or two of the winding is "shorted", even such a "small short" that doesn't affect the Ohms measurement much dissipates what should have been spark energy as HEAT and greatly reduces spark at the plug.
I have two 55V John Deere saws under my workbench. The intention was to make one runner out of two. Have enough projects for several lifetimes like most of the others on this site. Both have spark if I remember right. Steve.
BarnyardEngineering
Well-known Member
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- Rochester, NY
This thread was started 14 years ago, and parts were hard to come by then. I'd imagine they're not any easier to find now, if you can find them at all.
Have you checked with chainsawr.com or on ebay? You might have to pay too much but the alternative is a chainsaw-shaped paperweight.
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Dougman8382
Guest
I tested the primary at
Yesterday I tested the primary at 20k, 200k, and 2000k. The photo shows one small test. I did this each time after putting the leads together. (I’m a mechanical technician) It’s zero every time.
Everything I’ve read says that the primary is twice as much as it should be. 4ish. It’s over 8. This coil will not cause a plug to spark. I’m asking for help finding the part. Please.
Thank you
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Dougman8382
Guest
Pretty good is a huge understatement. This saw kicks butt.
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Dougman8382
Guest
Thanks for the suggestions. I did all the things before coming here to beg for help. JD does not have the parts and the Echo equivalent has been discontinued. Nothing on eBay. The listing on chainsawr is sold out.
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Dougman8382
Guest
I also have many projects going on. I’d much rather be working on one of the boats. This saw has been reliable for years and I have trees to clean up at a remote location. This one’s a runner if I can find one part. Are you offering to sell me a coil or teasing me with your two?
wore out
Well-known Member
''I’m asking for help finding the part. Please.''
I understand that. Still, it wouldn't hurt, just for fun, to drop down to the 200 Ohms range and check the primary resistance.
You've tried 'most every other range, why not try the correct one?
I won't trouble you any more!
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Dougman8382
Guest
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Dougman8382
Guest
You came here to tell me I’ve done something wrong when I have not. I just explained how I used every ohm setting on my home meter. You must have not read and understand my reply. If you can help find the part, please reply. Otherwise you have no helpful information and are wasting everyone’s time here. Thank you for your unhelpful input. Take all that experience and help someone out who has not been using meters for 30 years. Some people just have too much time and feel the need to be superior. You’re wrong''I’m asking for help finding the part. Please.''
I understand that. Still, it wouldn't hurt, just for fun, to drop down to the 200 Ohms range and check the primary resistance.
You've tried 'most every other range, why not try the correct one?
I won't trouble you any more!
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Dougman8382
Guest
My meter has 5 ohm settings and all 5 read zero. The meter I bought home from work last week is auto adjusted and it read zero. One picture is not showing all the testing that went into this. The coil is bad and no amount of arguing is going to change that. Find another thread to correct people on.''I’m asking for help finding the part. Please.''
I understand that. Still, it wouldn't hurt, just for fun, to drop down to the 200 Ohms range and check the primary resistance.
You've tried 'most every other range, why not try the correct one?
I won't trouble you any more!
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