Chain saw question

[fireman57]

Can't find my answer anywhere else and there is a ton of knowledge on this forum so here goes. I have an Echo 510evl chainsaw that won't stay oiling. I have cleaned the tank and filter, cleared all the lines with a fine wire, and put new o-rings on the oiler. It will oil for about half a tank and then quit. I don't want to burn up another bar. Is there a cam that the oiler rides on that makes the pump work or am I missing something? Just haven't been able to figure it out and it has been to the shop three times and they haven't fixed it either but want to keep charging me. Don't stop by DC much anymore as when I do have time I stay on the repair side of the forums but would welcome any help or advice you all have.

 

[KRS]

Re: Chain saw question

arborist site dot com is a great forum for everything tree & chainsaw; if no one can help here.

I have a Stihl but I'm not a repairman and don't have any idea; although I'm amazed your dealer can't fix it !!!

KRS

 

[Lone Duck]

Re: Chain saw question

Can't find my answer anywhere else and there is a ton of knowledge on this forum so here goes. I have an Echo 510evl chainsaw that won't stay oiling. I have cleaned the tank and filter, cleared all the lines with a fine wire, and put new o-rings on the oiler. It will oil for about half a tank and then quit. I don't want to burn up another bar. Is there a cam that the oiler rides on that makes the pump work or am I missing something? Just haven't been able to figure it out and it has been to the shop three times and they haven't fixed it either but want to keep charging me. Don't stop by DC much anymore as when I do have time I stay on the repair side of the forums but would welcome any help or advice you all have.

It has been a long time since I have worked on an echo. So long that I have forgotten the model numbers. How old is the saw? The oiler plunger is ran from a gear behind the clutch and pump housing. Make sure your plunger travel area is clean and return spring is good. How ever from your description of the oiler working till the tank is only 1/2 full. Leads me to believe that either your pickup tube is stuck at the top of the tank instead of the bottom. Or the tank is not breathing correctly causing a vacuum in the tank stopping the oil from being drawn through the oil tube to the pump. Also the oiler plunger is cut on an angle at one end that runs against a pin which causes the plunger to slide back and forth when rotated by the gear off the clutch which is usually plastic , check the gear. and check if the pin is still there. sometimes they are known to fall out during service. 1/2 full eh? that is bothering me. I will probably come up with the answer about 3 oclock in the morning. I know I 'm not going to sleep well thinking about it. Let me know what happens.

 

[fireman57]

Re: Chain saw question

Thanks Lone D for the info. Saw is probably mid to late '70s. It's my uncle and he is too infirm to use it anymore but he was once a bear of a man.
I don't mean that it quits oiling when the oil tank is half full but rather it will slow down until it quits oiling after about a 1/2 tank of gas. What would cause the tank to stop breathing? The cap is good and the seal on it is fine also. The gear you are talking about I assume is behind the clutch. Do I need anything other than a standard puller for the clutch or is there an easier way? I have a schematic of the saw that came with it when it was new but don't see a pin or gear that would drive it. Sorry to ruin your nights rest.

 

[Lone Duck]

Re: Chain saw question

Thanks Lone D for the info. Saw is probably mid to late '70s. It's my uncle and he is too infirm to use it anymore but he was once a bear of a man.
I don't mean that it quits oiling when the oil tank is half full but rather it will slow down until it quits oiling after about a 1/2 tank of gas. What would cause the tank to stop breathing? The cap is good and the seal on it is fine also. The gear you are talking about I assume is behind the clutch. Do I need anything other than a standard puller for the clutch or is there an easier way? I have a schematic of the saw that came with it when it was new but don't see a pin or gear that would drive it. Sorry to ruin your nights rest.

Yes the gear is behind the clutch. The clutch is threaded on. There should be a nut built on the clutch the same size as the spark plug tool. Pull your spark plug and turn the crank shaft till the piston is slightly above the exhaust port. The feed some rope into the cyl so that the piston will not turn over top dead center. put wrench on clutch nut and give it a sharp hit with a hammer. make sure you are turning the nut the same direction that the clutch turns when running. Once the clutch is off you will see a plastic gear. on the crank shaft that turns the oiler gear. pull it off and check to see if it is stripped on the bottom side. After you pull the oiler gear, there is 3 or 4 screws to remove and the oiler housing will pull right out along will your oiler hose and screen. You may have to pry on the back end of oiler to remove if there is a lot of dirt there. That is where the pin is that I was talking about , right on the angled side of the plunger. There is also a small screw that goes through the plunger gear into the shaft. Make sure it is tight, if you remove it for clean up make sure you use blue loctite when putting back. I am talking a smaaaallll screw. Like in your glasses. When oiler is out, check the tube and the brass screen for holes and or dirt. The plastic oiler gear most often fails when you jamb the chain and try to give more power which heats the clutch which melts the oiler gear. make sure you replace the washer under the oiler gear during reassembly , some times it welds to the plastic gear if it was over heated. Before assembly flush the oil tank with gas. That will remove bits of saw dust and water. Also some models have the breather tube behind the chain bar under the port that delivers the oil to the chain, Others have a small hole in the cap. Same principle as the small vent on a gas can. Hope this helps.

 

[fireman57]

Re: Chain saw question

LD I believe that you are thinking of the Poulan and other models where the oiler is located. On the echo it is on the top of the saw and just unscrews and pulls out orings and all. The base is spring loaded and it has a series of orings on it. Also my oil line and screen comes out the top of the tank. The screen filter is on the end of it and sits at the bottom. The line then goes to the passage at the top of the saw where the oiler is. It almost has to ride agains a cam of some kind to engage the pump. After the pump the oil travels to the passage that goes to the bar. Thanks for the help and I probably will pull the clutch to see exactly how it does work. My theory is broke is broke so I shouldn't be able to hurt it too bad.

 

[Lone Duck]

Re: Chain saw question

LD I believe that you are thinking of the Poulan and other models where the oiler is located. On the echo it is on the top of the saw and just unscrews and pulls out orings and all. The base is spring loaded and it has a series of orings on it. Also my oil line and screen comes out the top of the tank. The screen filter is on the end of it and sits at the bottom. The line then goes to the passage at the top of the saw where the oiler is. It almost has to ride agains a cam of some kind to engage the pump. After the pump the oil travels to the passage that goes to the bar. Thanks for the help and I probably will pull the clutch to see exactly how it does work. My theory is broke is broke so I shouldn't be able to hurt it too bad.

I apologize . The echo's that I have worked on were a tad newer. Husky, sthil, jonsered. poulan, echo, and others now have basically the same system . Sorry I wasted your time. The only pump I remember at the top was a homelite you could manually pump it when in heavy cutting. before that they were all manuel.

 

[Bard1]

Re: Chain saw question

Yes the gear is behind the clutch. The clutch is threaded on. There should be a nut built on the clutch the same size as the spark plug tool. Pull your spark plug and turn the crank shaft till the piston is slightly above the exhaust port. The feed some rope into the cyl so that the piston will not turn over top dead center. put wrench on clutch nut and give it a sharp hit with a hammer. make sure you are turning the nut the same direction that the clutch turns when running. Once the clutch is off you will see a plastic gear. on the crank shaft that turns the oiler gear. pull it off and check to see if it is stripped on the bottom side. After you pull the oiler gear, there is 3 or 4 screws to remove and the oiler housing will pull right out along will your oiler hose and screen. You may have to pry on the back end of oiler to remove if there is a lot of dirt there. That is where the pin is that I was talking about , right on the angled side of the plunger. There is also a small screw that goes through the plunger gear into the shaft. Make sure it is tight, if you remove it for clean up make sure you use blue loctite when putting back. I am talking a smaaaallll screw. Like in your glasses. When oiler is out, check the tube and the brass screen for holes and or dirt. The plastic oiler gear most often fails when you jamb the chain and try to give more power which heats the clutch which melts the oiler gear. make sure you replace the washer under the oiler gear during reassembly , some times it welds to the plastic gear if it was over heated. Before assembly flush the oil tank with gas. That will remove bits of saw dust and water. Also some models have the breather tube behind the chain bar under the port that delivers the oil to the chain, Others have a small hole in the cap. Same principle as the small vent on a gas can. Hope this helps.

Man you are good!!

 

[fireman57]

Re: Chain saw question

You haven't wasted my time at all and I could never consider learning something or meeting someone new a waste of time. I thank you for sharing your knowledge and TAKING the time. I really do appreciate it. I am going to pull the clutch and see what the heck is going on back there anyway. There has to be a cam of some sort that it rides on which may be gear driven. My schematics just don't show that. Once again, I very much appreciate the time you have given to this problem.

 

[fireman57]

Re: Chain saw question

Well I found out that my oiler runs on one of the lobes of my crankshaft. Thanks for the tip with the rope to get the clutch off. Turns out that the spring on the oiler was too weak to let it pump. New one ordered for36 bucks. Thanks again.

 

[chiefalen]

Re: Chain saw question

36 American dollars for a spring robber barons. Thats why i keep every spring in a coffee can, when you see one keep it, off every carb i never throw them away.

Carb bowls also, and o-rings,etc, etc,. Oopps thats must be why my wife yells at me the garage is full of spare small engine parts hah.

Good luck !

 

[Lone Duck]

Re: Chain saw question

Well I found out that my oiler runs on one of the lobes of my crankshaft. Thanks for the tip with the rope to get the clutch off. Turns out that the spring on the oiler was too weak to let it pump. New one ordered for36 bucks. Thanks again.

Your welcome! Glad I was able to help a little.

 

[muskie hunter]

Re: Chain saw question

Can't find my answer anywhere else and there is a ton of knowledge on this forum so here goes. I have an Echo 510evl chainsaw that won't stay oiling. I have cleaned the tank and filter, cleared all the lines with a fine wire, and put new o-rings on the oiler. It will oil for about half a tank and then quit. I don't want to burn up another bar. Is there a cam that the oiler rides on that makes the pump work or am I missing something? Just haven't been able to figure it out and it has been to the shop three times and they haven't fixed it either but want to keep charging me. Don't stop by DC much anymore as when I do have time I stay on the repair side of the forums but would welcome any help or advice you all have.

Do a search on google. I am about 90% sure that saw was recalled by echo due to the clutch blowing up and injuring the user. If you take it to a certified echo dealer and it is a recalled saw, they will give you a brand new echo saw no questions asked.
Oh and the problem with your oiler is mostlikely a stripped drive gear. A very easy and cheap fix.

Thanks Steve