Rebuilding The JMS 064

[dall]

I prefer leaving the bottom in those.View attachment 81802

mine is like that?

 

[Roadfxr]

I prefer leaving the bottom in those.View attachment 81802

Is that how my muffler is done John?


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[RI Chevy]

I think it provides a little structural rigidity to the can.

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[MustangMike]

Drilled a 1/2" hole and opened it up a bit, and it works just fine, and is not annoyingly loud.

Would do it the same again.

 

[Manofstihl066]

Here's how mine turned out after trimming. This was before switching to tree monkey.

 

[RI Chevy]

Drilled a 1/2" hole and opened it up a bit, and it works just fine, and is not annoyingly loud.

Would do it the same again.

You need another one on top of the one you already drilled.

 

[Redfin]

mine is like that?

That is yours.

Is that how my muffler is done John?




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Yours was the first 661 I did Aaron. I dont recall.

 

[Redfin]

Is that how my muffler is done John?


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Now Im curious. Can you pop the cover?

 

[BuckthornBonnie]

One thing to consider.....

Failures have happened on 066s with 288 pistons. One of the reasons might be because of AM wrist pin bearings........but it is important to note that the pin boss is wider in the 288 piston, and that allows the rod to shift from side to side. If a 288 piston is to be used on a 066 rod, then shims should be made to take up this width.

I believe that was the failure, yep. Good point--- how many other failures of AM pin bearings are out there amongst OPE members? How many of those failures were in stock saws ?

Heck I have 5 or 6 still going in firewood saws. No problems... yet.

 

[Roadfxr]

Now Im curious. Can you pop the cover?

Yes I'll pop it open in the morning


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[MustangMike]

You need another one on top of the one you already drilled.

If you look at it from the other side, it does not make sense to do it. There is a solid barrier on the top that does not allow the exhaust access to that area.

 

[Roadfxr]

Now Im curious. Can you pop the cover?

Here's your answer John. Should I cut it out like Dalls? Or just leave it alone?


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[Redfin]

Here's your answer John. Should I cut it out like Dalls? Or just leave it alone?


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If you want send it to me Aaron. Ill cut it and add another port on starter side if you wish.

 

[Redfin]

Julians testing had shown gains with the baffle out and a dual port.

 

[Time's Standing Stihl]

If you want send it to me Clint. Ill cut it and add another port on starter side if you wish. View attachment 81948

Sounds good, I'll do that

 

[Roadfxr]

If you want send it to me Aaron. Ill cut it and add another port on starter side if you wish. View attachment 81948

Sounds good John. I'll shoot you a text later.


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[Redfin]

Sounds good, I'll do that

Send it I promise to make it at least 8.34% slower.

 

[Time's Standing Stihl]

Send it I promise to make it at least 8.34% slower.

Not bad considering. About average for you?

 

[Mastermind]

I like my saws slow.....and my women fast.

 

[dall]

I like my saws slow.....and my women fast.

lol rabbit man