McCulloch Chain Saws

[machinisttx]

The 610 and 650 had thick rings in the early years and both were built with thin rings in the later years.

BTW, the 600 series started in 1978 and lasted until they went out if business

Reading it again, I didn't word my question earlier very clearly. If I'm reading everything correctly, the pistons are fully interchangeable between jugs?

 

[MS460WOODCHUCK]

I recently picked up another PM55. I run 32:1 mix and it seems to run rich when I rev it. I have not had it in the wood yet. It has the non adjustable high screw like my other 55. My other 55 has the same carb and runs fine at 32:1 actually it runs very well seeing how it beats the heck out of my 550xp both wearing 16" bars. Anyhow I was just wondering what to do with my new 55 and it running rich with the non adjustable carb. Any ideas?

 

[MS460WOODCHUCK]

Reading it again, I didn't word my question earlier very clearly. If I'm reading everything correctly, the pistons are fully interchangeable between jugs?

I'm pretty sure they will all interchange.

 

[joeymt33]

Reading it again, I didn't word my question earlier very clearly. If I'm reading everything correctly, the pistons are fully interchangeable between jugs?

I'm very sorry, yes you can interchange the pistons between the 610 and 650

 

[OldDeadWood]

How times change.

When I joined AS years ago I said I had an Eager Beaver 3.7". Every one said Ba, Bluck, Ugh, Eager Beaver Yuck.
Now everyone is saying, Ahh 600 series, not bad, good little bucking saw. etc. How times change.

I got my EB 3.7 new and tried to save it because it was new and I was cutting fire wood with a sears/roper 3.7".
As time passed I aquired more saws and the EB got left in its case.



It now has a few hour of cutting time on it but remains a case queen.



I always thought it was a good little saw with plenty of power and it now makes a great item in my collection.

ODW

Merry Christmass all.

 

[awol]

While the cylinders are interchangeable between the 610 and 650, they are different part numbers according to the parts list. Maybe it is only because of the decomp on the 650, but could be porting also. It seems that if the saw is fitted with a manual decompress or, there would be no need for the Q-port on the exhaust side.

 

[joeymt33]

While the cylinders are interchangeable between the 610 and 650, they are different part numbers according to the parts list. Maybe it is only because of the decomp on the 650, but could be porting also. It seems that if the saw is fitted with a manual decompress or, there would be no need for the Q-port on the exhaust side.

I agree that there is no need for a decomp on these saws. The Q-port does a good job of relieving compression. The only difference I can see is in the pictures I posted earlier that shows the exhaust port. The 650, 655, and super 610 have the larger exhaust port. The intake port and transfer ports look the same from what I remember. I'll check that in a little bit.

 

[joeymt33]

After comparing a 650 and 610 cylinder, I see no other differences.

 

[ethar]

Mac kinda shot themselves in the foot in this time period. Alot of interchangeable parts, saws that would last way more than the average 100hr life of most modern saws. Mac was ahead of the curve for years on design and reliability but like any good company they eventually crash. Logging has become one of those professions that is slowly dying giving way to more mechanized machines as in any industry. Wood heating is becoming one of those secondary selling points to a house and most youth are more interested in their electronics than the outdoors.

I've had a few Stihls some Huskys Homelites a few Macs and guess what is still running.

 

[machinisttx]

I'm very sorry, yes you can interchange the pistons between the 610 and 650

Thanks for the info. I scratched my head when I read it again and figured I should clarify.

 

[ozflea]

The 650 was the Hi-performance version with thin rings

 

[joeymt33]

I've had several pm650's with thick rings. Actually, I still have one. I've also had them with the thin rings as well. The only difference was the brake handles. Flag brake handle saws had the thin rings and the pivoting brake handle saws were the earlier models with thick rings. Now the pm655 was only offered with thin rings.

Joey

 

[heimannm]

And once again, as with all things McCulloch, there are no absolutes. The 650 that I picked up has the compression release port (now plugged), and was fit with a 48" bar before I got it.

Mark

 

[joeymt33]

The decomp port is accurate for the 650. Now the long bar wasn't, that was just silly.

 

[joeymt33]

But, you're right. There were no absolutes. McCulloch made their own frankensaws.

 

[joeymt33]

Hey mark, what's the update on the bp399?

 

[struggle]

I have a 650 here. curious now as to what rings it has?

 

[joeymt33]

It's not too hard to check. Remove four fasteners from bottom plate and then the two muffler fasteners. You will also be able to confirm if you have a real 650 by looking to see if the port is wide.

 

[joeymt33]

I don't know what the deal is with ring size. I've heard it's better for rpm to have thin ones but I've got a husqvarna 576xp apart on the bench right now and it's thick rings. So modern technology and engineering says to use thick?

 

[Nickolas]

On my 10 10S i got several months back i just got around to tinkering with it. It has the updated fuel line fitting instead of the molded hose running through the tank. The metal fitting where the hose runs through it. That sucker leaks like hell and floods out my housing. Is there suppose to be some sort of seal inside the fitting or a special hose? I cant use it as it leaks so bad This saw is like new and i wanna ser how she runs but with that fuel leak i cant. Whats the fix for this fitting?

Nick

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