SawTroll
Information Collector
11,500 is waaaay rich on that saw, 12,500 sounds more correct!
162SE scored piston
- Thread starter MarkEagleUSA
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MarkEagleUSA
ArboristSite Guru
My hearing must be going because it sure sounds like it stops 4-stroking between 11.5 and 12. I'll see if I can get another video tomorrow.
SawTroll
Information Collector
No surprice there, as those rpm means it is set too rich. It should of course four-stroke a little at full throttle out of wood, but it should clean up in the wood .
MarkEagleUSA
ArboristSite Guru
I think that's what it's doing where I have it at 11,500. Also, in the owner's manual under the carb adjustment section it says "check by means of a revolution counter that the high idle speed does not exceed 11,500 r/min".
Now, I'm not doubting you or Bob as both of you have infinitely more knowledge about this than I do, but I'm a bit uncomfortable taking it any higher with the way it sounds to me. Like I said, I'll see if I can get another video tomorrow for you guys to listen to.
SawTroll
Information Collector
My weekly update...
On the advice of Bob, I tuned her to 11,500 (he suggested 12-12.5) out of cut. Any more than that and she stops burbling. Seems a lot better now in the cut.
I also think I'm having a clutch problem. If I lean on the saw just slightly the chain stalls leading me to think the clutch is probably slipping. Would replacing the drum help or do I need to find a course-thread clutch too?
The OM also say 11,500 - but it also say it is for high idle, not for WOT. Odd indeed!
The 1996 for the 630 Super II say 13k max - to put it in perspective....
If Bob is Spike60, I would stick to what he said! :msp_wink:
Your clutch issue is hard to say much about from here, but it surely sounds like something is wore out.
MarkEagleUSA
ArboristSite Guru
Yup, that Bob. He seems to know a lot about this family of saws. :msp_thumbup:The OM also say 11,500 - but it also say it is for high idle, not for WOT. Odd indeed!
The 1996 for the 630 Super II say 13k max - to put it in perspective....
If Bob is Spike60, I would stick to what he said! :msp_wink:
I guess tomorrow I'll crank her up to 12,500 and see what happens.
I hit the shoes and the inside of the drum with some fine emery cloth and a coarse scotchbrite to knock off the glaze so maybe that'll help. :dunno:
MarkEagleUSA
ArboristSite Guru
Spun her up to 12,500 and she sure seems better in the cut (no video today as everyone is coming and going). Not sure if she's 4-stroking out of the cut but she's pulling between 8800-9400 in the cut based on the tach.
Didn't seem to help. Now the quest for a decent used coarse-thread clutch begins...
MarkEagleUSA
ArboristSite Guru
Found one at Chainsawr. I also got a new drum/rim sprocket. It comes with a plastic dust shield and a metal washer. Does the washer go between the rim and dust shield?
No, the metal washer sits in the recess in the oil pump and the rim and the plastic dust shield, go on the drum.
SawTroll
Information Collector
Make sure it is fourstroking a little at WOT out of wood! If it isn't, it is too lean on the H side, and you risk scoring it. :msp_scared:
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Eccentric
Mister Wizard
Damn right. Set it right, and error on the side of caution if unsure.
MarkEagleUSA
ArboristSite Guru
Well that makes more sense... thanks!No, the metal washer sits in the recess in the oil pump and the rim and the plastic dust shield, go on the drum.
SawTroll
Information Collector
One more thing;
Remember that the numbers we have discussed are the maximum numbers - always start some hundred rpm lower, and work gradually up until it stops fourstroking out of wood. Then back off just a little, until it starts fourstroking again.
Not all saws run the best at maximum rpm, it varies between different saws of the same model.
:msp_wink:
Remember that the numbers we have discussed are the maximum numbers - always start some hundred rpm lower, and work gradually up until it stops fourstroking out of wood. Then back off just a little, until it starts fourstroking again.
Not all saws run the best at maximum rpm, it varies between different saws of the same model.
:msp_wink:
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MarkEagleUSA
ArboristSite Guru
Here's an updated video from today. Not sure if you can tell whether it's 4-stroking or not because the audio isn't the best. Drastic improvement in cut times from the last one. The saw feels as strong as it was before the little mishap.
[video=youtube;rEd8ajBCq88]http://www.youtube.com/watch?v=rEd8ajBCq88[/video]
MarkEagleUSA
ArboristSite Guru
I'm hoping to make it to Bob's GTG next month and plan on bringing this old gal with me. Perhaps he or someone more knowledgeable than me can take a look at it to make sure she's tuned properly. 
Eccentric
Mister Wizard
I never heard any 4-stroking in the video. You never held it at WOT unloaded (or lifted cutting pressure in the cut at WOT). Running unloaded at WOT is when we'd hear the 4-stroking. The 'blip blip blip' action is useless for hearing the H side tune (but does help tell you if you have it right on the L side).
From what I heard, you're still too lean. Do some more cuts. When in about the middle of the cut, lift cutting pressure for a moment while KEEPING the trigger held at WOT. You should hear it 4-stroke ('honk') as soon as you lift cutting pressure, and 'clean up' as soon as you get 'er loaded down again.
From what I heard, you're still too lean. Do some more cuts. When in about the middle of the cut, lift cutting pressure for a moment while KEEPING the trigger held at WOT. You should hear it 4-stroke ('honk') as soon as you lift cutting pressure, and 'clean up' as soon as you get 'er loaded down again.
MarkEagleUSA
ArboristSite Guru
Rookie camera operator... she didn't press RECORD soon enough. :msp_sneaky:
Too lean? :confused2: I'm really afraid to take her any higher. Like I said, hopefully I can get to the GTG where someone will take mercy on my soul.
I'm pretty sure it was doing that in my test cuts before the video but then again my hearing apparently isn't what it used to be.
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Eccentric
Mister Wizard
Yes. Too lean. I was suggesting that you should tune it a bit richer on the H side (turn the needle counterclockwise), which would have it run lower (not higher) at max unloaded RPM.
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MarkEagleUSA
ArboristSite Guru
Doh! Apparently my eyes ain't what they used to be either... :msp_scared:
Eccentric
Mister Wizard
No worries. I just don't want to see you damage your saw.
