Milling with a new ms660

[82cabby]

Hi all-

I have a few questions newbie questions. I have an ms 660 that is going to replace my old 310 in my Granberg / Alaskan mill. The 660 has some hours on it sawing up firewood, so it's not BRAND new. But I would say probably 4 - 6 hours of use. I have an opportunity to saw-up and keep some free walnut and cherry tomorrow, so my questions are:

How much more oil should I use in the gas over an above the regular ratio? I have read that the ratio should be as low 16:1.

I gather I should richen up the carb quiet a bit. I have searched, but am having trouble determining exactly how to make that adjustment... It seems obvioud to turn the high speed screw counter clockwise an eigth of a turn at a time, but I am assuming there is more to it...

My plan is to cut for a few minutes, and let the saw idle for a few minutes, cut for a few, idle for a few....

Any insight would be appreciated! Thanks!

 

[820wards]

Hi all-

I have a few questions newbie questions. I have an ms 660 that is going to replace my old 310 in my Granberg / Alaskan mill. The 660 has some hours on it sawing up firewood, so it's not BRAND new. But I would say probably 4 - 6 hours of use. I have an opportunity to saw-up and keep some free walnut and cherry tomorrow, so my questions are:

How much more oil should I use in the gas over an above the regular ratio? I have read that the ratio should be as low 16:1.

I gather I should richen up the carb quiet a bit. I have searched, but am having trouble determining exactly how to make that adjustment... It seems obvioud to turn the high speed screw counter clockwise an eigth of a turn at a time, but I am assuming there is more to it...

My plan is to cut for a few minutes, and let the saw idle for a few minutes, cut for a few, idle for a few....

Any insight would be appreciated! Thanks!

Cabby,

I run my mixture at 40:1 and as much as 32:1.

If you can richen the carb, that would be good. You don't want to score a piston/cylinder by running your saw to lean, oil is cheaper than a new cyl/piston Also letting your saw run at idle a couple of minutes after making a long milling cut will let the motor cool down. Have fun!

jerry-

 

[betterbuilt]

Hi all-

I have a few questions newbie questions. I have an ms 660 that is going to replace my old 310 in my Granberg / Alaskan mill. The 660 has some hours on it sawing up firewood, so it's not BRAND new. But I would say probably 4 - 6 hours of use. I have an opportunity to saw-up and keep some free walnut and cherry tomorrow, so my questions are:

How much more oil should I use in the gas over an above the regular ratio? I have read that the ratio should be as low 16:1.

I gather I should richen up the carb quiet a bit. I have searched, but am having trouble determining exactly how to make that adjustment... It seems obvioud to turn the high speed screw counter clockwise an eigth of a turn at a time, but I am assuming there is more to it...

My plan is to cut for a few minutes, and let the saw idle for a few minutes, cut for a few, idle for a few....

Any insight would be appreciated! Thanks!

I Have a hard time getting some of my saws tuned properly so I wouldn't hesitate to fill it up with fresh 92 octane 40:1 and take it to a shop and see if they will do it for free. Alot of times they just do it just to prove they can. I can't say I've ever been charged but I also buy a lot of parts from my shop. I wouldn't say anything about the 40:1.

When you get that saw milling take some pictures. BB

 

[sachsmo]

Go over to the chainsaw forum and do some searches on the 660 muffler. Most say it is too choked up. Lots of air in, lots of air out and a tweak rich on the high side should be a good start. Also plenty of bar oil, and as 820 said give her a rest now and again to idle off some of the heat.

I use a very good synthetic oil and mix 32:1, overkill perhaps, but I havent scored one (yet)

 

[mdavlee]

A newer 660 muffler is very restricted. Has maybe a 1/2" hole for a 92cc saw. Open up the existing hole all the screen will cover if you plan on running the screen and maybe go to 40:1 and run it probably 1k richer. One of the guys close to me set his 066 at 11.5k when milling. It actually cuts a little slower there but has plenty of lube.

 

[gemniii]

And if you don't want to open up the muffler yourself you can buy the DP muffler cover from Baileys. Some say it "burns your hands" but I have not had that problem. It will ring your ears

 

[82cabby]

Thanks everyone for the detailed advice! I set the high throttle carb adjustment as rich as the limiter would allow (not to far from the stock setting actually) and used gas mixed 32:1. It was taking about 4 1/2 minutes to make a complete cut so I would idle for about a minute mid cut and then let the saw idle for 2 minutes before starting the next one. It seemed to work really well. The logs weren't that big, the widest board we ended up with was just over 12 inches. The saw is definately capable of more. We ended the day with 45 board feet of cherry rangeing from 10 inches to 12 inches wide and 95 board feet of black walnut averaging 8 1/2 inches wide (once you discount the sap wood). All 6/4 thick.

I'll post pictures when I have a chance to get them off my phone. Thanks again to everyone for the advice!

 

[mtngun]

Thanks everyone for the detailed advice! I set the high throttle carb adjustment as rich as the limiter would allow (not to far from the stock setting actually) and used gas mixed 32:1.

Suggest tuning to 12,000 - 12,500 rpm WOT.

Synthetic oil.

I run 40:1, but 32:1 should work, too.

 

[corsair4360]

Exhaust Restriction

If you open up the muffler by opening the hole where the gas goes out you need to remove the limiting device on the high speed jet. reducing the exhaust restriction means it leans out the mixture and the motor needs more fuel. I opened my new MS460 up and needed more than I could get with the limiter in place. It has more power, but it it louder than before.

 

[82cabby]

Suggest tuning to 12,000 - 12,500 rpm WOT.

Synthetic oil.

I run 40:1, but 32:1 should work, too.

I was using stihl's synthetic oil. I will save the conventional stuff for cutting firewood. I have a multimeter with a tach function for automobile work... I should be able to figure out how to get it to read for the saw so I can see where it is at now. I don't want to take the stock limiter off the carb setting yet though. I think I will wait until it's out of warranty. (I know... I know...)

 

[betterbuilt]

I was using stihl's synthetic oil. I will save the conventional stuff for cutting firewood. I have a multimeter with a tach function for automobile work... I should be able to figure out how to get it to read for the saw so I can see where it is at now. I don't want to take the stock limiter off the carb setting yet though. I think I will wait until it's out of warranty. (I know... I know...)

I didn't even know the 660 came with a limiter. Huh. There's no way I be running 32:1 but everyone on here seems to have an opinion about it.

I personally don't have a problem with running a saw stock. There is something to be said to not have to carry water with you to put out fires the muffler causes.