McCulloch Chain Saws

[rwoods]

Just a little confusion, I think. Some saws have impulse hoses, some have a hole in the carb base. I think he just meant is the impulse passage clear? I would rather think you might have had some dirt somewhere, either still in the tank, fuel filter or carburetor that may have worked it's way to the carb orfices...that or the coil might be opening up when hot.

Doesn't take much to confuse me. I'll start at the fuel filter and work my way back. The coil issue may be it - certainly with the PM700 as the hotter the day the shorter it takes to get to a no start situation. I haven't run the PM8200 enough to know. I was just giving it a shakedown yesterday and using up a chain on it's last resharpening. Thanks, Ron

 

[HeRoze]

I and about 15 others spent the morning through mid-afternoon clearing county roads from a single lane down the middle to clearance side to side. ====

peace and blessings to you and all of ya'll looking out for each other... good on you.

 

[Dennis Gauge]

Hey guys, you probably don't remember but I've been having carburetor problems with a PM700 for a while now.

Well, I FINALLY have a running saw!

No more hemorrhaging fuel, no more flooding!

The last guy had the carburetor set seriously F-A-T on this thing... That's where the big smoke was coming from.

BY THE WAY... Would anybody have a spare plastic handle grip insert for the PM700 I could barter for?

 

[Duke Thieroff]

Would you happen to know where I can get some thrust washers for my 1-76, or atleast a part number?

Piston assembly number 58878, thick ring.


Much obliged

Chris

 

[Duke Thieroff]

Hey guys, you probably don't remember but I've been having carburetor problems with a PM700 for a while now.

Well, I FINALLY have a running saw!

No more hemorrhaging fuel, no more flooding!

The last guy had the carburetor set seriously F-A-T on this thing... That's where the big smoke was coming from.

BY THE WAY... Would anybody have a spare plastic handle grip insert for the PM700 I could barter for?

You got yourself one heck of a good firewood saw now man!

Chris

 

[rwoods]

peace and blessings to you and all of ya'll looking out for each other... good on you.

Thanks. I just learned that we suffer one casualty though. One of our cutters broke his foot; he cut for three hours on it late yesterday and didn't know he had broken it. An unseen branch driven in the ground apparently caused the top he was cutting to unexpectedly roll. He didn't complain then nor is he complaining now. He's a professional firefighter with medical training and is dedicated to helping others. He's made several trips to Haiti and was one of the founders of our local firewood ministry. He is still green on chainsaws and unlike us he doesn't really care who made them. I tell all you MAC guys this because if you use your saws this type work is so rewarding - running your MACs is just icing on the cake. And if you can do it though an organization you can pick up some insurance coverage for mishaps. Lastly, you'll meet folks who appreciate seeing you fire up a big old noisy MAC. Ron

 

[a. palmer jr.]

Doesn't take much to confuse me. I'll start at the fuel filter and work my way back. The coil issue may be it - certainly with the PM700 as the hotter the day the shorter it takes to get to a no start situation. I haven't run the PM8200 enough to know. I was just giving it a shakedown yesterday and using up a chain on it's last resharpening. Thanks, Ron

Ron, I've run my PM700 on some pretty hot days last summer and never had it quit. I was ready to quit way before it was!

 

[rwoods]

Ron, I've run my PM700 on some pretty hot days last summer and never had it quit. I was ready to quit way before it was!

One tank is usually my limit with the 700 because my left hand goes numb. I hope to get it running like it should and try some AV gloves. Thanks for your advice. Ron

 

[rwoods]

KART SAW ?s

Maybe this belongs in the kart thread but seeing that my MAC kart saw is really just a show off toy, I'm stealing the long bar off it for my work saws. I have a 28" roller nose from my first 125 that is 58 gauge (btw 28" is the cutting lenght). Oregon makes some .404 58 gauge square ground chain. Assuming the motor is as strong as the 196 psi compression suggests, what pin sprocket do you recommend with the 28" bar? 8, 9, 10 or more? I don't have the tools to make loops so I would like to get it right the first time. Thanks, Ron

 

[stinkbait]

I hate pestering you guys with my petty questions but there is so much conflicting advice given in the general threads that most of my searchs are worthless to a novice like me. Although differences of opinion exist here too, I have found this thread to be very reliable and my hat is off to you for helping guys like me especially when you are answering the same question for the umpteenth time.

I believe I have solved my smoking PM800. I recently repaired the oiler and turned it up. It is throwing off a lot of oil which is ending up in the muffler "mod" a previous owner had made. I'll clean the bar and tinker with it some more. If necessary I'll put a sawdust flap on the guard.

Now to my perplexing question. I have a PM8200 which I had fixed up for my brother. It runs like my PM700 has always run except not as long. PM700 after one or two tanks of gas won't start. PM8200 after 1/2 to 2/3 of a tank won't start. I wrote the PM700 off to vapor lock as it boils gas constantly. PM8200 doesn't boil the gas; it just quits idling and then you can't restart it. It has a recent carb rebuild - my first ever (except for autos back in the early 70s). What should I be looking for or trying?

Thanks, Ron

If the saw runs good in the cut, not lean, and then dies after making the cut, it's probably too rich on the low side. This could also make the saw hard to start after the engine is hot, but easy to start at first when the engine is cold. It could be vapor locking, but I doubt it because most of the 10 series gas caps are old and leak anyway.

 

[nallac]

today i got stuck in and stripped PM700#1..

Inside the fuel tank

Nice healthy piston....

Inside the crank case...

Gotta shake my head at how some people treat there saws.........
All bearings bar the wide one feel good.The Wide crank bearing is very notchy.
Wonder what it go like with a new set of rings...........

Had PM#2 out and cutting yesterday,it was spotlessly clean before this pic...

only ran thru two tanks of gas.
But it sure does cut good with the 24" B/C combo, aheap more grunt than my old baby st#@l
I noodled up some 20"ish pine with big Knots and a 18" peice of Mac(was my splitting log ran outta things to cut).
I still need to retune the carby after reading the Tuneing thread on here.



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[cpr]

Maybe this belongs in the kart thread but seeing that my MAC kart saw is really just a show off toy, I'm stealing the long bar off it for my work saws. I have a 28" roller nose from my first 125 that is 58 gauge (btw 28" is the cutting lenght). Oregon makes some .404 58 gauge square ground chain. Assuming the motor is as strong as the 196 psi compression suggests, what pin sprocket do you recommend with the 28" bar? 8, 9, 10 or more? I don't have the tools to make loops so I would like to get it right the first time. Thanks, Ron

I was reading the SP-125 manual on Friday and I believe it said the saw came with 8 pin .404 standard. Is that correct? If so, I believe a 101 should easily haul a 9 and at 28" a 10 shouldn't be taxing it.

 

[CM76]

I was reading the SP-125 manual on Friday and I believe it said the saw came with 8 pin .404 standard. Is that correct? If so, I believe a 101 should easily haul a 9 and at 28" a 10 shouldn't be taxing it.

Yes - Part No. 86331 .404 8T

 

[Ambull]

Maybe this belongs in the kart thread but seeing that my MAC kart saw is really just a show off toy, I'm stealing the long bar off it for my work saws. I have a 28" roller nose from my first 125 that is 58 gauge (btw 28" is the cutting lenght). Oregon makes some .404 58 gauge square ground chain. Assuming the motor is as strong as the 196 psi compression suggests, what pin sprocket do you recommend with the 28" bar? 8, 9, 10 or more? I don't have the tools to make loops so I would like to get it right the first time. Thanks, Ron

Why would it be just a show off toy? Are you comparing it to a regular SP125 or a modern saw? If you are comparing it to a modern saw, I understand, but it should be able to do everything a regular 125 can do, but with more power.

 

[RandyMac]

There were quite a few Kart powered 125s in the woods, they ate trees on a daily basis. I didn't need one, had a souped up 797.

 

[cpr]

How 'bout a kart powered 797?

Wait, this subject makes my blood boil right now...

Is it too early to stir in Jim with my Dunkin'?

Just looked out the window, raining again. SHEESH!

 

[RandyMac]

How 'bout a kart powered 797?

Wait, this subject makes my blood boil right now...

Is it too early to stir in Jim with my Dunkin'?

Just looked out the window, raining again. SHEESH!

If you wait an hour, I'll be Beaming up.

No rain today, yet another mild and sunny California day coming up.

 

[cpr]

I envy you. Yesterday was nice enough, but the last few weeks has had me considering Ark construction. Supposed to clear out here and then reload tonight. I could raft the farm fields across the state. Poor guys'll be lucky to plant by Memorial Day if this keeps up.

 

[leeha]

Sweet day here to.
Nice and sunny, warm, Great day
to work on my ? powered geardrive:msp_biggrin:




Lee

 

[RandyMac]

We have had our share of rain, it drains off here. There is a chance of a spring flood, lots of snow in the mountains, a "Pineapple Express" could melt it all at once.

If it comes down to it, on the 101 motor, I know a guy, who knows a guy who...................