Woods Porting The MS660......Tricks And Tips

[bryanr2]

I can't believe you leaked all this proprietary information! You'll probably never get another port job now!:cool2:

+1- if a builder wont share their builds, i won't share my money. Randy shares his, which leaned me towards him, and looking at my sig- it worked out for both of us.

 

[jropo]

I think you are safe. Probably not a handful of people who read these forums that even know what it means.

If I can get one of you to build one for me I sure as hell aln't going to learn how, ruin a couple in the process, and buy the stuff to do it with.

I think I will just stick to fixing what's broke.

Even if you have a good idea of what you want, what your doing, and have done a few other saws before w/ good results there has to be that moment when the carbide is spinning and it's about to start cutting on a $300 cyl. that makes you reaaaaalllly wonder if this is the right thing to do.

 

[Mastermind]

Even if you have a good idea of what you want, what your doing, and have done a few other saws before w/ good results there has to be that moment when the carbide is spinning and it's about to start cutting on a $300 cyl. that makes you reaaaaalllly wonder if this is the right thing to do.

I was doing a nice 036 Pro for a member last year........in a moment of slight distraction I let the burr contact the transfer bridge.......it bound and bent the shank.......then proceeded to destroy the plating inside that jug. All the port work was done and I was just blending and smoothing the transfer tunnels......so I lost the time I had in the work.....and I had to replace the jug.

 

[jropo]

I was doing a nice 036 Pro for a member last year........in a moment of slight distraction I let the burr contact the transfer bridge.......it bound and bent the shank.......then proceeded to destroy the plating inside that jug. All the port work was done and I was just blending and smoothing the transfer tunnels......so I lost the time I had in the work.....and I had to replace the jug.

:msp_ohmy::bang:

 

[Mastermind]

:msp_ohmy::bang:

I know......right?

The worst one I've had was a 372xp. I got it in a trade, it had puked the big end on the rod and was disassembled. The parts were loose in the box and little bits of the needle bearings were everywhere. I rebuilt it with a good used 371 crankshaft, new bearings, seals, gaskets, a good used 372 jug, and a new Meteor piston. I cut the squish band and ported it. She ended up being a great runner. Then I sold it.

After about ten tanks or so the owner contacted me and said it died. I had him to return it so I could fix it. I found a piece of that old needle bearing embedded in the bottom of the crankcase. I figured the it was hung in the air filter pleating and finally come loose. The top end was toast. I replaced it with an new OEM 372 top end, cut squish and ported......on my dime.

I sent Chris the saw back and it lasted about 6 tanks before it lost compression. I asked him to send it back again for me to fix......again. I was thinking by this time that the saw had a gremlin in it or something.

It had a broken ring and had trashed the top end again. I never could determine why it failed, but think I may have cracked the ring when I was putting it together. (That's the reason I put a nice bevel on the bottom of the bore these days)

I replaced that top end with a single ring 371 piston and OEM cylinder......cut squish and ported......so far it's still running, but Chris may call today about that demon saw.

If you do this stuff all the time there will be failures.......how you deal with those failures is what really matters though.

 

[jropo]

I know......right?

The worst one I've had was a 372xp. I got it in a trade, it had puked the big end on the rod and was disassembled. The parts were loose in the box and little bits of the needle bearings were everywhere. I rebuilt it with a good used 371 crankshaft, new bearings, seals, gaskets, a good used 372 jug, and a new Meteor piston. I cut the squish band and ported it. She ended up being a great runner. Then I sold it.

After about ten tanks or so the owner contacted me and said it died. I had him to return it so I could fix it. I found a piece of that old needle bearing embedded in the bottom of the crankcase. I figured the it was hung in the air filter pleating and finally come loose. The top end was toast. I replaced it with an new OEM 372 top end, cut squish and ported......on my dime.

I sent Chris the saw back and it lasted about 6 tanks before it lost compression. I asked him to send it back again for me to fix......again. I was thinking by this time that the saw had a gremlin in it or something.

It had a broken ring and had trashed the top end again. I never could determine why it failed, but think I may have cracked the ring when I was putting it together. (That's the reason I put a nice bevel on the bottom of the bore these days)

I replaced that top end with a single ring 371 piston and OEM cylinder......cut squish and ported......so far it's still running, but Chris may call today about that demon saw.

If you do this stuff all the time there will be failures.......how you deal with those failures is what really matters though.

Your right, lessons come at a price. And how you dealt w/ that situation was a brick that helped build who you are today.
G-pa always said its because all of the other parts are jealous of the new parts.

 

[StihlyinEly]

If you do this stuff all the time there will be failures.......how you deal with those failures is what really matters though.

As so often happens on this forum, a statement about porting chainsaws is really a statement about life in general.

 

[cowroy]

The last time I talked to ya it sounded like you might give up hope on the 371/372xp bottom ends. I hope you don't get anymore demons like that.

 

[pioneerguy600]

Randy,..concerning the effed up stuff, if you as a porter have not effed up some parts you have not entered into any new or unknown territories. I have and any other porter worth their salt has a collection of effed up parts, comes with the territory. Expensive jugs and pistons, yes I have a few along with some of the cheaper types I have experimented with and a few that were outright mistakes. I don`t beat myself up over it, just the cost of learning.

 

[mtrees]

Videos?? I'm in withdrawal!!!

 

[Mastermind]

Videos?? I'm in withdrawal!!!

Processing.......

I don't have the "before" video.

I let my grandson work the camera......well I shouldn't have.

 

[mtrees]

Haha I understand completely. I had my brother killing a nice 130" buck in Wyoming on video. That is until he decided to see how the camera worked while I was hunting.

 

[Scooterbum]

Randy,..concerning the effed up stuff, if you as a porter have not effed up some parts you have not entered into any new or unknown territories. I have and any other porter worth their salt has a collection of effed up parts, comes with the territory. Expensive jugs and pistons, yes I have a few along with some of the cheaper types I have experimented with and a few that were outright mistakes. I don`t beat myself up over it, just the cost of learning.

That is so true, I call it my "Damn it shelf". Everything from chainsaw cylinders to some very pricey HD heads. Comes with the territory.

 

[Tzed250]

Oh, the parts I've killed...

 

[Mastermind]

I did save the video. :msp_thumbup:

Stock in knot free poplar......

[video=youtube;zlXxqMt1DEo]http://www.youtube.com/watch?v=zlXxqMt1DEo&feature=youtu.be[/video]

 

[Mastermind]

After in crappy wood.

[video=youtube;-3xBvhYbWfk]http://www.youtube.com/watch?v=-3xBvhYbWfk&feature=youtu.be[/video]

 

[mtrees]

SWEET!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!:hmm3grin2orange:

 

[Mastermind]

SWEET!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!:hmm3grin2orange:

The videos don't do it justice. That wood is way too small for a good comparison.

 

[Tzed250]

Movin' some serious chips there!!!

 

[UK Rich]

So then, question. It has been mentioned that you dont lower the intake side. That's fine, but what if the intake is lowered, could you drop the jug still?