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Post by Deleted on Jan 12, 2018 11:57:41 GMT -5
Hi All,
I just picked up two 540's last Fri.One is in excellent shape,it has very good compression & a nice blue spark,but I can't get it to fire up by squirting fuel into the carb.Any ideas? The other saw is in rough shape to say the least.Most of the upper part of the saw is gone.It has good compression though,so it'll be a good parts saw.Both saws came with bars & chains,but seriously undersized on the parts saw.I don't understand why they had a large cc.saw,but put puny bars on them.My good saw has a 24"bar (which I consider too be still too small for an 88 cc.saw) The parts saw has a much smaller bar.
The good saw had a work order tag still attached to it,dated 8/2011.It was owned by a gentleman who worked for the Erie Canal Authority,his name is on the work order tag.I thought about looking him up,but that'll take some time.
So much for Flickr being"easy to use".Once again I'm unable to bring up the BBC code after I put my pics in an album & went to share.
Ed
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Post by Deleted on Jan 12, 2018 12:41:22 GMT -5
Hi All, I just picked up two 540's last Fri.One is in excellent shape,it has very good compression & a nice blue spark,but I can't get it to fire up by squirting fuel into the carb.Any ideas? The other saw is in rough shape to say the least.Most of the upper part of the saw is gone.It has good compression though,so it'll be a good parts saw.Both saws came with bars & chains,but seriously undersized on the parts saw.I don't understand why they had a large cc.saw,but put puny bars on them.My good saw has a 24"bar (which I consider too be still too small for an 88 cc.saw) The parts saw has a much smaller bar. The good saw had a work order tag still attached to it,dated 8/2011.It was owned by a gentleman who worked for the Erie Canal Authority,his name is on the work order tag.I thought about looking him up,but that'll take some time. So much for Flickr being"easy to use".Once again I'm unable to bring up the BBC code after I put my pics in an album & went to share. Ed I wonder the same thing about the C series, many of those saws also came with small 16" bars, but I think they were wider than other 16" bars |
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Post by undee70ss on Jan 12, 2018 13:19:35 GMT -5
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Post by Deleted on Jan 12, 2018 13:24:51 GMT -5
Thanks for getting my 540 pics up!
It's a pretty nice looking saw,isn't it? I can't wait to get her running.I have to admit,it's got some weight to it!
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Post by undee70ss on Jan 12, 2018 13:33:38 GMT -5
So much for Flickr being"easy to use".Once again I'm unable to bring up the BBC code after I put my pics in an album & went to share. Ed That may depend on which platform you are using. I added the pics using my desktop, but can't do it using the phone. Not sure why. |
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Post by undee70ss on Jan 12, 2018 13:55:09 GMT -5
Hi All, I just picked up two 540's last Fri.One is in excellent shape,it has very good compression & a nice blue spark,but I can't get it to fire up by squirting fuel into the carb.Any ideas? The other saw is in rough shape to say the least.Most of the upper part of the saw is gone.It has good compression though,so it'll be a good parts saw.Both saws came with bars & chains,but seriously undersized on the parts saw.I don't understand why they had a large cc.saw,but put puny bars on them.My good saw has a 24"bar (which I consider too be still too small for an 88 cc.saw) The parts saw has a much smaller bar. The good saw had a work order tag still attached to it,dated 8/2011.It was owned by a gentleman who worked for the Erie Canal Authority,his name is on the work order tag.I thought about looking him up,but that'll take some time. Ed Try a new plug first. If it still won't fire, prime it by squirting in plug hole. You definitely want to check the boot on those saws. My guess it's bad |
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Post by Deleted on Jan 12, 2018 19:09:01 GMT -5
I know why it won't fire up now.I tried squirting gas in the plug hole & in the carb as well.I decided to take a compression test,either my compression tester is bad,or I only have 50 lbs.compression.That most likely also explains why it sat in a barn since 2011.
Also the other 540 I thought I had is not a 540,it just has a 540 recoil cover on it.It also has the plug facing forward like a 410,but I don't believe it's a 410 either because the carb is on the lower front left side,whereas a 410 carb is on top of the saw.
It does have a UT# on it & serial # too.I'm going to try to look it up to see what model saw it really is.The UTis:10486-B,Serial#6G10 0122.Anybody know where I can get rings for a 540?
Well,I'll be a monkey's uncle,it is a 410,it must be a different sub-model than the other 410 I have.Now I have two incomplete 410 models.
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Post by Deleted on Jan 12, 2018 19:49:39 GMT -5
I know why it won't fire up now.I tried squirting gas in the plug hole & in the carb as well.I decided to take a compression test,either my compression tester is bad,or I only have 50 lbs.compression.That most likely also explains why it sat in a barn since 2011. Also the other 540 I thought I had is not a 540,it just has a 540 recoil cover on it.It also has the plug facing forward like a 410,but I don't believe it's a 410 either because the carb is on the lower front left side,whereas a 410 carb is on top of the saw. It does have a UT# on it & serial # too.I'm going to try to look it up to see what model saw it really is.The UTis:10486-B,Serial#6G10 0122.Anybody know where I can get rings for a 540? Well,I'll be a monkey's uncle,it is a 410,it must be a different sub-model than the other 410 I have.Now I have two incomplete 410 models. Sounds like an old fashioned whodunit. |
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Post by Deleted on Jan 12, 2018 20:26:26 GMT -5
I can't believe this - I went on Ebay & found several rings for my 540,they're $9 & the guy has 7 of them.Can anyone tell me how many rings the 540 has?The other thing that I'm concerned about is the cylinder - if the rings are bad,then might the cylinder be bad as well?I don't have a micrometer to check it.
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Post by sweepleader on Jan 12, 2018 20:31:57 GMT -5
Plating is very thin, if it is there, the cylinder should be fine. Plating will be lighter in color, base aluminum will be darker.
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My New 540
Jan 12, 2018 20:36:43 GMT -5
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Post by undee70ss on Jan 12, 2018 20:36:43 GMT -5
I can't believe this - I went on Ebay & found several rings for my 540,they're $9 & the guy has 7 of them.Can anyone tell me how many rings the 540 has?The other thing that I'm concerned about is the cylinder - if the rings are bad,then might the cylinder be bad as well?I don't have a micrometer to check it. If it really has only 50lbs of compression, it would need a lot more than just rings. Piston and maybe cylinder too. I’m somewhat confused, you first said it had good compression, now you say only 50lbs if gauge is correct. If it really only has 50lbs, pull rope would be VERY easy to pull, almost no resistance. Determine what it really has first before doing anything. That saw doesn’t look like it’s seen much use, still has the 540 decal on clutch cover. These usually wear off fast because the saw has to be on its side to refuel it. |
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Post by sweepleader on Jan 12, 2018 22:43:05 GMT -5
Try freeing the rings with some 50/50 atf/acetone in the cylinder, turn it over, a little more juice, let it sit, repeat a couple times for several hours. Then check the compression.
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Post by onlyhomelites on Jan 12, 2018 23:32:45 GMT -5
I've seen a lot of those models with very badly scored pistons that turn over hard giving the false impression of a good engine. The best way to know for sure is to pop the muffler off and take a look. If she's scored, hopefully the parts saw isn't. One thing I've noticed about these saws is that if the coil isn't bad, the damned engine is usually shot. Evidently there was no margin for error in the fuel mix and a lot of users found that out the hard way. I hope you can piece together enough to get it going! I haven't cut with mine (it's too purdy), but the videos out on youtube tehm to be a good cutting saw.
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Post by Deleted on Jan 13, 2018 9:17:14 GMT -5
Yeah guys,I'm beginning to think that my comp.tester is not good.It pulls over like it has 100 plus # of compression.I thought that reading was a bit too low.Looks like I need another compression tester.As for the other parts saw - it's NOT a 540,it's a Frankensaw - a 410 with a 540 recoil on it! The dealer I got it from is famous for putting parts on a saw just to make it run again.
Ed
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Post by undee70ss on Jan 13, 2018 9:28:06 GMT -5
I would still pulll the muffler and have a look at piston. This will tell you how healthy the saw is. Post pics.
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Post by sawnami on Jan 13, 2018 9:36:17 GMT -5
Yeah guys,I'm beginning to think that my comp.tester is not good.It pulls over like it has 100 plus # of compression.I thought that reading was a bit too low.Looks like I need another compression tester.As for the other parts saw - it's NOT a 540,it's a Frankensaw - a 410 with a 540 recoil on it! The dealer I got it from is famous for putting parts on a saw just to make it run again. Ed Where is the check valve located in your compression tester? It needs to be right at the end of the fitting that screws into the cylinder or you'll get abnormally low compression readings. |
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Post by Deleted on Jan 13, 2018 17:30:41 GMT -5
If you're referring to the little needle like pin that' sticks out of the bottom of the part that screws into the cylinder,yeah it's right at the end.
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Post by Deleted on Jan 13, 2018 18:37:38 GMT -5
I bought a new compression tester today & got 62# compression,but I heard some hissing going on & could see the gauge going down ever so slowly.I know I had the tester screwed in fairly tight,so I don't think it was coming from the plug hole.Is it possible that there's a cylinder gasket gone bad?I took the muffler off & looked into the cylinder & at the piston.I think the piston is very lightly scored,but I couldn't feel any gouges in the piston.The cylinder looked OK,but I might be wrong.I took some pics,but once again I can't get them from Flickr to HOH.If someone can help me get the pics here,then you all can tell me if I should take my 540 out back & shoot it,or if I can keep it on life support. Ed  20180113_165216 by edju1958, on Flickr  20180113_165620 by edju1958, on Flickr 20180113_165620 by edju1958, on Flickr The first pic is of the piston.The second & third pic are duplicates of the cylinder. |
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Post by sweepleader on Jan 13, 2018 19:53:28 GMT -5
Pictures look pretty good, piston not so much.
The cylinder gasket is not under pressure, only the rings and spark plug adapter. Of course the gauge or its hose could leak too. If it is not leaking it will hold steady till you release the pressure by pressing the valve on the gauge assembly. Leaking should only be heard if you are pulling over slowly and that will not give you a good reading no matter what is leaking.
You should be pulling the engine over as if you were trying to start it, until the gauge no longer rises. The highest reading is what you are looking for.
If the reading is low you can try putting a little oil in the cylinder to seal up the rings. The reading should rise. If it was a 4 stroke, you could use that method to tell if the lost compression was due to rings or valves. Since the 2 stroke doesn't have valves, this test is not as useful, only interesting.
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Post by undee70ss on Jan 13, 2018 20:08:13 GMT -5
The piston is scored. What does it look like by the rings? The other pic, your seeing the cylinder on the intake side. It would need to be taken apart to determine the extent of damage.
No, I would not shoot it. Even if it's not worth repairing, it still has good value in parts. 540's are not that common and parts are always sought after.
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