Post by onlyhomelites on Mar 31, 2019 8:13:25 GMT -5
No one else may ever come across this, but I thought I'd share my experience yesterday just in case. I was running my 410 in some big Madrone and the chain started gumming up, so I tried to give it some extra oil with the manual pump...the pump resistance was incredible and no oil would go to the bar. I figured the bar port was super clogged, so I chugged down to the truck and took it off. The bar port was full of crud, but even with the bar off, it still wouldn't pump so I bagged the saw for the day.
When I got home I started taking it apart and looking out the oil outlet on the saw, I thought I could see some sort of junk blocking the port. I took the outlet hose loose from the manual oil pump and put the air hose to it and nothing would go through! So I took the saw outside, aimed the outlet hose away from me (and the wife's car!!) and put air backwards through the oil port on the bar pad. This actually allowed movement and of course a slug of bar oil came jetting out. I then tried putting air through the hose again...it worked for half a second and then clogged again. So this time I reverse flowed it for about 30 seconds, hoping whatever it was would work through the crankcase and back out the hose.
This time it seemed to get it, so I put a new hose one (old one was pretty soft) and reassembled the saw. Test run showed good oil flow again, but it took a minute of run time to re-prime the automatic oil pump. The oil port on the bar pad is very small; even a small needle would be a tight fit. So whatever this was managed to get through the tank filter and all the way to that port. I guess my point about the small outlet hole is I don't believe any cleaning attempt that involves shoving a wire or needle into that port is going to end well. The compressed air seems to have removed the debris, but I'll know after I run another tank through it.
When I got home I started taking it apart and looking out the oil outlet on the saw, I thought I could see some sort of junk blocking the port. I took the outlet hose loose from the manual oil pump and put the air hose to it and nothing would go through! So I took the saw outside, aimed the outlet hose away from me (and the wife's car!!) and put air backwards through the oil port on the bar pad. This actually allowed movement and of course a slug of bar oil came jetting out. I then tried putting air through the hose again...it worked for half a second and then clogged again. So this time I reverse flowed it for about 30 seconds, hoping whatever it was would work through the crankcase and back out the hose.
This time it seemed to get it, so I put a new hose one (old one was pretty soft) and reassembled the saw. Test run showed good oil flow again, but it took a minute of run time to re-prime the automatic oil pump. The oil port on the bar pad is very small; even a small needle would be a tight fit. So whatever this was managed to get through the tank filter and all the way to that port. I guess my point about the small outlet hole is I don't believe any cleaning attempt that involves shoving a wire or needle into that port is going to end well. The compressed air seems to have removed the debris, but I'll know after I run another tank through it.