Still wondering if anyone can identify why these saws whistle on startup????
Nik's Poulan Thread
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Still wondering if anyone can identify why these saws whistle on startup????
rms61moparman
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Yes I can!
It is the coronet effect!
The reeds aren't sealing completely and are allowing just enough pressure to come back through the reeds to make that little squeaky whistle.
Just like playing a coronet or sax.
The first S25 I rebuilt scared the stuffin' out of me doing that.
I took the saw apart twice after the rebuild to find out what wasn't right and was making that terrible scraping squeak.
I felt really STUPID when I finally figured it out.
Mike
redunshee
Addicted to ArboristSite
Poulan 4000 has me stumped
Put a 4000 P&C on one of my Poulans and had it running good. Cut some cookies and it was runnig fine but then stopped. I switched carbs and nothing. Put mix in carb, nothing. Put mix in cylinder, nothing. Its getting spark and when I pulled carb its wet, yet it won't sputter. Did a pressure and vacuum test and it held. Wonder if I need to pull cylinder and see whats up. Comp is 130 with new rings so I'm at a loss. Any ideas?
Bob
Put a 4000 P&C on one of my Poulans and had it running good. Cut some cookies and it was runnig fine but then stopped. I switched carbs and nothing. Put mix in carb, nothing. Put mix in cylinder, nothing. Its getting spark and when I pulled carb its wet, yet it won't sputter. Did a pressure and vacuum test and it held. Wonder if I need to pull cylinder and see whats up. Comp is 130 with new rings so I'm at a loss. Any ideas?
Bob
rms61moparman
Addicted to ArboristSite
OK smarty pants
.
You can see the hole in the oil tank.
.
I have a poulan 3000 that I love, MM & SG chain, it rips! I think the 2800 has the raw aluminum bore, compression is fair...we'll see.
.
Here's the 5200, I traded another member for it. It's a really well built saw!
It slightly scored the piston and stuck the rings. Tiny amount of aluminum transfer in the bore, it cleaned up very easily.
redunshee
Addicted to ArboristSite
No Mike, I thought that may be the problem but its fine. I'm really stumped. Think I'll replace the coil for yucks and see what happens. Don't want to pull the Cylinder as I don't see that as the problem, but who knows.
Bob
bob- is the plug getting wet ? my 25da quit on me like that after a rebuild. turned out the screen inside had plugged up with fibers from the re-used felt filter. cleaned screen & carb-new ceramic filter and runs right since.
I had a similar problem with one of my 4000's. New lines, filter, rebuilt carb. Same as you. I swapped a carb off a 3.7 and it ran perfect. Actually I just tuned it in the wood yesterday. What's strange is I put the "problem carb" from the 4000 on the 3.7 and it ran as good as before. I'd agree with Mike, check ur flywheel.
Thanks, Question whats the fix??? It did this even after a new reed pedal was put on. Would giving it a very slight bend help??
lawnmowertech37
Addicted to ArboristSite
Personally i would rather work on a saw or trimmer before working on a mower engine anyday those 4 cycles can be a pain to fix
rms61moparman
Addicted to ArboristSite
Take the handle off and remove the reed valve and turn it over.
I would NOT go bending on those reeds.
Usually the ones I've seen run fine after you get them started.
Personally I wouldn't mess with it as long as it is starting and running good.
If you just have to fix it, flip the reed valve over. if that doesn't stop it you will have to replace the reed and/or the housing.
Mike
Mike
redunshee
Addicted to ArboristSite
Latest development. After pulling my hair out I threw out 1 month old gas and picked up some fresh gas. Also changed filter which I think was the culprit. Runs now but at idle if you put it on its side(recoil side down) it dies. Did it even after changing carbs. Guess I'm going to have to tear into it. Worst part is I had it sold and now have to offer the buyer his money back ,as I can't in good conscience, send it to him as it is. Too bad because it sold for way more than it should have. I did offer to send him another one I have and refund him some money for the inconvenience. I imagine there must be an air leak somewhere in saw for it to die on its side. Oh well live and learn.
redunshee
Addicted to ArboristSite
Well you probably right cause in my case I think it was the filter.
lawnmowertech37
Addicted to ArboristSite
bob i have the 26119 duckbill valve in
Hey thanks, I went and took the housing off and right away seen the reed wasn't sealing good. I had a few brand new reeds laying around so I tryed the new one and it's the same issue, just ever so slightly bent, so I went and tweaked them a bit until I got them flat, put em all back together and no more whistle, better throttle response, and a lot less back spray through the carb at hight idle. Thanks this is somthing that drove me crazy.
I have talked with a guy that has an old sears saw. He claims that there is no model number on it that he can find. It has a 17 or 18 inch bar on it. It is white on top and has blue sides. It has the oil and fuel filler caps on the top. The clutch cover says "power sharp" and "bolt action" on it. I can't get over there until friday. Anyone have a clue what this thing might be? It's driving me nuts.
My guess would be Roper with that color scheme
I have talked with a guy that has an old sears saw. He claims that there is no model number on it that he can find. It has a 17 or 18 inch bar on it. It is white on top and has blue sides. It has the oil and fuel filler caps on the top. The clutch cover says "power sharp" and "bolt action" on it. I can't get over there until friday. Anyone have a clue what this thing might be? It's driving me nuts.
Yes as was said, it sounds like an older Roper 3.7, the newer ones were Red and White. From what I've read on here they're a decent saw for the age, very torquey.
You guys keep putting the Roper pictures up here and I'm going to fix ya's.
I'll send you one just like the last one pictured, make you fix the dang thing and then see if you ever want to post a picture of one of them again.
I'll send you one just like the last one pictured, make you fix the dang thing and then see if you ever want to post a picture of one of them again.
I watched your saw Bob, a looker for sure! At least your being honest. Sounds like a seal on the flywheel or pto side. Its not that big of a job too which is good. What are you gonna do with it now? I'm sure once you fix it it will sell high again, if you decide to do that.
You guys keep putting the Roper pictures up here and I'm going to fix ya's.
I'll send you one just like the last one pictured, make you fix the dang thing and then see if you ever want to post a picture of one of them again.
:agree2:
UGHHHH ropers!
Let me put things right here.
<a href="http://s729.photobucket.com/albums/ww294/joe25da/?action=view¤t=Picture006.jpg" target="_blank"><img src="http://i729.photobucket.com/albums/ww294/joe25da/Picture006.jpg" border="0" alt="Photobucket"></a>
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