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Post by rowdy235 on Sept 7, 2018 21:05:54 GMT -5
Picked up this saw today!  Pretty nice if I do say so myself. Has a few issues I'm looking to work out: - Missing Starter Rope. I think I can figure this one out, but any tips on getting the new rope on? - Missing Spark Plug Boot. The wire is long enough so I think I am going to pick up a universal one from Ace Hardware tomorrow, should be able to make it work. - Missing Muffler and Cylinder Cover. Anybody have some they'd like to part with?  Can this saw be run safely (tested only, not cutting) without a muffler? Seemed like my 770 didn't have much of a muffler, it certainly didn't do much muffling. I spun it over tonight with my drill and checked for spark, it had an intermittent spark but was pretty weak. Gonna pull the flywheel and clean and gap the points for starters. May need parts, just not sure yet. Does anybody know what size screw the flywheel takes (the three small holes for the puller that is)? Attachments:
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Post by Deleted on Sept 7, 2018 21:28:24 GMT -5
You might want to resize that picture, takes forever to load. 3.66MB is about 10 times larger than most pictures posted here.
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New 707g
Sept 7, 2018 21:40:03 GMT -5
via mobile
Post by rowdy235 on Sept 7, 2018 21:40:03 GMT -5
You might want to resize that picture, takes forever to load. 3.66MB is about 10 times larger than most pictures posted here. Interesting. What's odd is I didn't do anything different with this picture than the others I've shared. I'll see what i can do |
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Post by Deleted on Sept 7, 2018 22:21:23 GMT -5
You might want to resize that picture, takes forever to load. 3.66MB is about 10 times larger than most pictures posted here. Interesting. What's odd is I didn't do anything different with this picture than the others I've shared. I'll see what i can do I know, the others loaded slow too, I just thought I'd offer a suggestion. Pictures over 1mb take a long time to load, your pictures have been close to four times larger than that in weight. Weight on pictures is an odd thing as you can reduce the pictures size to 366kb (10 times smaller) and not lose much picture quality at all. |
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Post by tjthechainsawmech on Sept 8, 2018 0:08:41 GMT -5
I have the needed parts for that saw.....it'd look nice on my shelf with the others to..........................
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Post by rowdy235 on Sept 8, 2018 10:50:23 GMT -5
Alright the picture should be better now. I think the issue is my hosting site was not resizing photos, and my new phone has a 12MP camera. I figured out how to have my hosting software automatically resize photos when uploaded, so it should be better now. I also figured out how to embed a thumbnail rather than the full size photo. So appears this was really an ID 10 T error on my part lol. Thanks for pointing it out!
Hoping to get the flywheel off and get spark in the saw today!
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Post by Deleted on Sept 8, 2018 15:49:18 GMT -5
Alright the picture should be better now. I think the issue is my hosting site was not resizing photos, and my new phone has a 12MP camera. I figured out how to have my hosting software automatically resize photos when uploaded, so it should be better now. I also figured out how to embed a thumbnail rather than the full size photo. So appears this was really an ID 10 T error on my part lol. Thanks for pointing it out! Hoping to get the flywheel off and get spark in the saw today! It worked perfectly. Many times we cannot see an issue on loading time if we already have the image in our cache. Both pictures are great and load instantaneously. |
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Post by rowdy235 on Sept 8, 2018 21:18:34 GMT -5
Well worked on the saw all day and pretty much got nowhere.
Pulled the flywheel and everything looked good under there, actually much better than other saws I have or have worked on. I filed and gapped the points, reassembled but still no spark. I ran the tests on the secondary/primary of the coil with an ohmmeter and appears that it is good. Condenser tested good too. I disconnected the kill switch just to rule it out.
When turning it over with a drill, I occasionally get a weak spark out of the end of the wire to the cylinder head (still don't have a boot- need to order one), but nothing substantial. I temporarily attached a new spark plug to the wire and there is no spark to speak of. So it seems there is spark, just not enough. I did get "zapped" a couple times while holding the plug wire and it felt to be a pretty good jolt.
I'm at a loss at this point. I suppose the plug wire could be bad but the coil measured normally (I was measuring from end of plug wire). Is it possible for a coil to test good but still be bad? Maybe I just need to sleep on it....
On the bright side, and just to say I accomplished something, I did get the chain soaking in oil (its a little rusty/stuck in a couple places) and cleaned up the surface rust on the bar.
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Post by Deleted on Sept 8, 2018 21:59:08 GMT -5
Spark testers often don't work for me. I would try using a new wire, boot, and plug next to the head, no gas of course
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New 707g
Sept 8, 2018 22:39:41 GMT -5
via mobile
Post by rowdy235 on Sept 8, 2018 22:39:41 GMT -5
Spark testers often don't work for me. I would try using a new wire, boot, and plug next to the head, no gas of course I think that's a good plan. Need a boot anyway and a new wire never hurt. |
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Post by Deleted on Sept 8, 2018 22:52:21 GMT -5
I have gotten really weak tests from spark testers, but when tried to fire t up, the saw ran great. I'm always looking for bright blue spark, but I've NEVER seen much more than a orange glow if anything from a spark tester. Granted I didn't pay a lot for this thing and you gets what you pays for.
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Post by tjthechainsawmech on Sept 8, 2018 23:20:53 GMT -5
File the points down more. Let it sit over night. 2100 I am trying to get going had no spark day before yesterday and in the morning there was spark. lol Funny thing.
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Post by rowdy235 on Sept 9, 2018 13:29:36 GMT -5
Thanks guys. Appears there may be something to TJ's method as this morning I was able to get a fairly consistent spark from the end of the plug wire, but when attaching to a spark plug still nothing. So i'm going to try to get a new wire and boot and go from there, I figure it doesn't hurt to replace it and it may just solve the problem. On a darker note I observed what appears to be some light scoring on the cylinder wall- can just barely see it through the spark plug hole. I'll have to investigate further and see if it poses any issue. Need to get a new compression tester as my old one broke. The rest of the cylinder and piston looks nearly pristine so I am hoping it is just some light markings and not any real damage. I did get the recoil rewound so there's one thing out of the way. Still soaking the chain in oil. Here's how the bar came out:  Still needing to pick up those parts, I'm mainly concerned about the muffler, I can do without the cylinder cover for a while. |
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Post by rowdy235 on Sept 9, 2018 20:37:35 GMT -5
Well I will be out of town for work until next weekend so pry won't be any progress until then. Fortunately before I left I inspected they cylinder a little closer and don't think its got any damage- looks like just a little streaking probably from me turning over the saw to test for spark (have been putting oil in cylinder each time). The piston, or at least what I can see of it, is pristine!
I have got the chain pretty much all freed up but went ahead and left soaking in oil for the week, figure it can't hurt.
In the meantime I am doing a little searching. If the new wire and boot are no luck with my ignition, what should be next? Coil? Condenser? I see there is an entire set of coil/condenser/points on ebay that I think may be a good option. Can the electronic "chips" be made to work with this model saw? I see a lot of them on ebay but none of them say they fit the 707.
I'm also still in the hunt for the cylinder cover and muffler- does anybody have any leads?
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Post by Deleted on Sept 9, 2018 20:46:46 GMT -5
Well I will be out of town for work until next weekend so pry won't be any progress until then. Fortunately before I left I inspected they cylinder a little closer and don't think its got any damage- looks like just a little streaking probably from me turning over the saw to test for spark (have been putting oil in cylinder each time). The piston, or at least what I can see of it, is pristine! I have got the chain pretty much all freed up but went ahead and left soaking in oil for the week, figure it can't hurt. In the meantime I am doing a little searching. If the new wire and boot are no luck with my ignition, what should be next? Coil? Condenser? I see there is an entire set of coil/condenser/points on ebay that I think may be a good option. Can the electronic "chips" be made to work with this model saw? I see a lot of them on ebay but none of them say they fit the 707. I'm also still in the hunt for the cylinder cover and muffler- does anybody have any leads? On this vintage saw even if a chip were available I would exhaust all other possible remedies before I would even consider that option |
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Post by rowdy235 on Sept 9, 2018 21:47:30 GMT -5
On this vintage saw even if a chip were available I would exhaust all other possible remedies before I would even consider that option I agree completely, I would much rather have the factory ignition, I was a bit worried parts may be NLA but it looks like that is not the case. Does anybody know if this ignition setup is the same as a C-91? Because it looks dang near identical to mine, at minimum its very similar. I would pay a tidy sum to know the history of this saw. It looks as though somebody took it apart at some point and may have even replaced the coil (it looks relatively new). For some reason it doesn't look like they ever finished the job. It worries me a bit that they may know something I don't, but then again I know how it goes when life gets in the way or you realize your in over your head. |
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Post by Deleted on Sept 9, 2018 22:51:20 GMT -5
On this vintage saw even if a chip were available I would exhaust all other possible remedies before I would even consider that option I agree completely, I would much rather have the factory ignition, I was a bit worried parts may be NLA but it looks like that is not the case. Does anybody know if this ignition setup is the same as a C-91? Because it looks dang near identical to mine, at minimum its very similar. I would pay a tidy sum to know the history of this saw. It looks as though somebody took it apart at some point and may have even replaced the coil (it looks relatively new). For some reason it doesn't look like they ever finished the job. It worries me a bit that they may know something I don't, but then again I know how it goes when life gets in the way or you realize your in over your head. Maybe the reason you got a deal on it? |
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Post by rowdy235 on Sept 14, 2018 21:45:03 GMT -5
Well a little bit of news tonight Got myself an actual point file and cleaned up the points again. Cleaned up the entire ignition unit and cleaned up the part of the crankcase that the ignition unit mounts to. I don't know what part of that made the difference but I now have a nice blue spark  . Unfortunately due to ridiculously slow shipping I still do not have my new wire and boot  I also got my ancient compression tester working and it has around 150psi when turning over with a drill. So that looks good. I went ahead and pulled the gas tank off and I am hoping to spend some time this weekend cleaning things up. I also have a carb kit on the way. Hopefully by next weekend the parts will be in so I can reassemble. I better get on ordering those exhaust parts I need. One area of concern is it looks like one of the mounting "ears" for the gas tank has broken off. Specifically the right one above the carburetor. I've got to look at it and see if there's an easy way to fix it. I'm thinking about trying some JB weld, but also looks like a large washer may fit the bill. Have to do some experimentation unless somebody has a fuel tank they'd send my way for free Will get some pictures up as I get things cleaned up. |
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Post by rowdy235 on Sept 15, 2018 21:58:48 GMT -5
Well didn't have as much time to work on the saw today as I wanted but did make some solid progress. Got all the parts cleaned up except the carburetor which I am waiting on my rebuild kit for. Used a variety of methods for cleaning. I'm not going for a full restoration here- just want it too look presentable. By far the hardest part to clean was the flywheel. Besides it being very dirty it has all sorts of nooks and crannies. I spent at least an hour on it and parts of it are still not perfect. Here's a shot and where things stand now. Funny, for a saw I didn't intend to tear all the way down I certainly have torn down pretty far. Oh well, hopefully assembly goes smoothly!  The current plan is to begin reassembly once the parts arrive, hopefully by next weekend. Also, showing my ever-bad luck, as I was cleaning up from the day I dropped a 3/8 extension into my oil drain pan with about 3 quarts of oil I had been soaking the chain in. The extension knocked a hole in the bottom of the pan and drained all the oil onto the shop floor  |
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Post by sweepleader on Sept 16, 2018 6:42:35 GMT -5
Murphy never sleeps...
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