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Author Topic: Chain not staying wet  (Read 753 times)

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Offline rasawing

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Chain not staying wet
« on: May 30, 2018, 02:57:15 PM »
I have a Stihl MS 660 where I cannot keep the chain wet while sawing. I know it's putting out oil because the tank runs out quickly. Not sure where the oil is going.....but it sure isn't getting on the chain. The emitter hole isn't blocked. I've checked that. Any ideas as to what could be the issue?

Offline Upstatewoodchuc

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Re: Chain not staying wet
« Reply #1 on: May 30, 2018, 03:00:24 PM »
How long of a bar? The ms660 is kind of know for not putting out enough for bars over the 32" range. Someone here knows better than I do, but I believe there is some oiler mod or replacement for them from stihl.
Current collection: Husky 3120xp,  394xp, 365, 345, stihl 017, homelite xl12.  Ford 8n with loader and forks. 1968 Chevy C50 dump truck

Offline rasawing

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Re: Chain not staying wet
« Reply #2 on: May 30, 2018, 03:03:36 PM »
It's a 25" bar. 


Offline Upstatewoodchuc

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Re: Chain not staying wet
« Reply #3 on: May 30, 2018, 05:57:18 PM »
Did some digging, seems some people even with 25" bars like yours have complaints. Did you adjust the oiler output to the max? If that's not enough, stihl makes a high output oiler or you can rebuild the one you have with the high output piston and screw. Part #'s 1122 647 0602 --piston. #1128 647 4802 --control bolt. Good luck!
Current collection: Husky 3120xp,  394xp, 365, 345, stihl 017, homelite xl12.  Ford 8n with loader and forks. 1968 Chevy C50 dump truck

Offline DelawhereJoe

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Re: Chain not staying wet
« Reply #4 on: May 30, 2018, 07:32:39 PM »
Is there anything between the bar and inner bar plate or between the inner bar plate and the body that could cause the bar oil to leak out somewhere before it makes it to the bar ? Another thing to think about it how worn is the bar between the rails and or have the rails opened up ?
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Offline DaveP

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Re: Chain not staying wet
« Reply #5 on: May 31, 2018, 07:41:53 AM »
                                                                                                                                                I put a high output oiler on my 660. Oils very well now.  

Online Skeans1

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Re: Chain not staying wet
« Reply #6 on: May 31, 2018, 08:55:35 AM »
Thatís one thing Iíve never understood with Stihl is why do they need two oil pumps? My 390/385 will oil a 42Ē when wide open.

Offline rasawing

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Re: Chain not staying wet
« Reply #7 on: May 31, 2018, 01:06:11 PM »
Quote
Did you adjust the oiler output to the max?


Using the screw? I've tried adjusting it a few times. The thing about it is: because of the low output, I cannot tell if I have it adjusted right. And since these screws can just rotate and rotate......it's hard to tell. 

Thanks to everyone for their feedback (so far). 

Offline rasawing

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Re: Chain not staying wet
« Reply #8 on: June 04, 2018, 02:10:36 PM »
Ok....I think I got it fixed. And I'm man enough to admit: I really screwed this up. Turns out the weep hole (that gets the oil into the bar) really was blocked. It was the first thing I checked.....and somehow I missed it. I run a piece of wire through the hole to be sure.....but somehow it missed this glob of stuff. 

Thanks everyone for the feedback.


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