MCCULLOCH The official McCulloch thread

[Al Smith]

I don't know if the CP has an iron bore or not .If so you could over bore it . I did however sleeve a 125C using grade 50 cast iron and it came out just fine . Weather LA Sleeve would have a sleeve that would work I have no idea . No matter what it is there usually is an option for repairs .

 

[jacob j.]

That is pretty well what I was figuring.
I think a good cleanup of the cylinder will be good, but may try to get it bored to clean it up completely, and see if I can find a piston for it. Definitely needs a muffler

Did you get this rebuilt yet? I wanna see a video...

I don't know if the CP has an iron bore or not .If so you could over bore it . I did however sleeve a 125C using grade 50 cast iron and it came out just fine . Weather LA Sleeve would have a sleeve that would work I have no idea . No matter what it is there usually is an option for repairs .

The CPs have an iron liner Al. I think the CP cylinder's closest relative is the 797. Like Nathan mentioned, some of the CPs have an integral boost port and some have the removable boost port cover. I think
some of the replacement cylinders had no boost port at all even though the boss was cast into the cylinder for them.

 

[Frank bierce]

Nice score! Sometimes a new decomp pin will tighten it up, and usually they still seal up with some wear. What style cylinder? Early or late style, what does the boost port boss look like?

I’ll have to get some more photos, I’m guessing it’s a later style cp, original owner said the saw was purchased in 71. I’ll shoot some more photos, since I’m not overly familiar with the differences.

 

[Frank bierce]

Did you get this rebuilt yet? I wanna see a video...



The CPs have an iron liner Al. I think the CP cylinder's closest relative is the 797. Like Nathan mentioned, some of the CPs have an integral boost port and some have the removable boost port cover. I think
some of the replacement cylinders had no boost port at all even though the boss was cast into the cylinder for them.

Lol. Not quite. I am getting together a list of stuffs I need to rectify this non running status.

 

[Al Smith]

Some place I have different porting schemes related to the 125 cc kart and chainsaw engines that Mc Bob collected . I might have some on micro fitch . On that though I know very little except a working knowledge of the 125 c's . I might add I have an iron cylinder 80 cc that Dan Henry sent me .I haven't yet delved into it to see if those back side transfers could be added . I few years back I missed a pair of "quarter timed " 101's by about a week that would have been freebies .Alkie burners .

 

[edju1958]

Getting back to my PITA 10-10.I put a different clutch on the had the "keepers" in the springs & it made absolutely no difference at all,still clanging like a dinner bell.I'm about to strip it down,take it out back & use it for target practice.
On a better note I started working on a LH start 10-10.I had to hunt up a tank cover & screws,found it on my porch where I worked last yr.The gasket still looked good,so I put a thin coat of Yamabond on it & tightened it down.The starter was missing 2 screws in different places,robbed therm from another LH start 10-10.I had to quit so I could go hunt up a carb & found 3 of them.I've got one SDC3 & 2 SDC2s.They've all been rebuilt,but never used.Tomorrow a.m.I'll pressure test them & see if they're any good.If not I've got 2 SDC37s & a SDC18 that are brand new.

 

[Steve]

Getting back to my PITA 10-10.I put a different clutch on the had the "keepers" in the springs & it made absolutely no difference at all,still clanging like a dinner bell.I'm about to strip it down,take it out back & use it for target practice.
On a better note I started working on a LH start 10-10.I had to hunt up a tank cover & screws,found it on my porch where I worked last yr.The gasket still looked good,so I put a thin coat of Yamabond on it & tightened it down.The starter was missing 2 screws in different places,robbed therm from another LH start 10-10.I had to quit so I could go hunt up a carb & found 3 of them.I've got one SDC3 & 2 SDC2s.They've all been rebuilt,but never used.Tomorrow a.m.I'll pressure test them & see if they're any good.If not I've got 2 SDC37s & a SDC18 that are brand new.

The sdc18 is the big fully adjustable carb. Used on the 6-10 and the 7-10.

Searching for your parts still, I have not forgotten about you.

 

[heimannm]

Ed - I think your clanging may be coming from the pawls not opening when they should. Is it possible someone put an extra notch on the springs that hold them in?

Mark

 

[edju1958]

Ed - I think your clanging may be coming from the pawls not opening when they should. Is it possible someone put an extra notch on the springs that hold them in?

Mark

This is on a RH start.I've put 2 different clutches on & have gotten the same results with both.I've got a new clutch coming from Bob J.Is it possible that I have the wrong style clutch on?I have the downward pointed pawls on,might I need the curved inward pawls?

 

[edju1958]

I just can't win to go to hell.I put a carb on the 2nd 10-10,some jackass had straightened out the little crook on the end of the choke rod.Putting that little bend back in that rod is not easy,I've had them break trying to bend them,but I did manage to get it almost perfect.I put fuel in the tank & of course it had to leak.The saw would barely start & it ran so rich it couldn't throttle up.I pressure tested the carb & it had a very slight leakdown,so slight that it was barely noticeable.I'm done playing with the SDC2,I'll put a new SDC37 on & I'll have to pull the tank cover off & that'll get a different tank cover with a buna square O ring material as a gasket.

 

[Al Smith]

If I get a chance I'll see if I can find the RH 10-10 boxes of parts .I had to rob the crankshafts from two or three for the RH 6-10 until I figured it was the flywheel that caused the cranks to fail .Slow learning curve but I might have some righty clutches if I can find them .BTW I detest RH starts .

 

[PogoInTheWoods]

I've put 2 different clutches on & have gotten the same results with both.

That sorta drops the clutch as the problem down a couple notches. I'd still be leaning toward the drum/sprocket/bearing/thrust washers as the noisemaker(s), unless it's the starter itself. Should be easy enough to swap another one on to find out.

Out of curiosity, are you testing these setups with a bar and chain installed? If not, give that a try and see if it helps. Should at least stabilize the drum/sprocket enough to dampen the chatter if it's a sloppy fit there, or maybe provide other clues if it's the clutch or the starter.

Trying it without the drum could also tell you a couple things. Being a RH start, you at least have the starter cover to keep shoes and springs from flying everywhere if the clutch explodes.

 

[Maintenance Chief]

I would/have run a saw without the clutch and drum installed, but will NEVER run one without the drum after Witnessing the clutch explode on one that got spun off, the metal chunks let gouges it the hard oak of the wood shed boards!
I'm pretty careful about tightening them now because it could have lead to an eye patch situation or worse.

 

[edju1958]

Poge,I have a new drum & rim on it,made no difference between new & old.I lubed the bearing,no difference.It has the appropriate washers in the right places.I tried a different starter - no difference.I'm at a stone wall with this freaking saw.I've got a new clutch coming from Bob J.
If the new clutch doesn't do it,then it's getting stripped for parts & taken out back & put out of it's misery (mine too).

 

[PogoInTheWoods]

Bar and chain?

 

[Al Smith]

Let it rattle ,sooner or later what's causing it will fall off .

 

[Al Smith]

Without bad mouthing the saw you have to remember it's a 10-10 and a righty .These things by nature can rattle around like a BB in a box car and still operate well .Why on earth McCulloch ever made a right hand start remains a great mystery to me plus some of the carbs were a bit odd especially when they had better options .What on earth were they thinking ?Other than that ,rattle or no they almost run forever which is a good thing .

 

[PogoInTheWoods]

Let it rattle ,sooner or later what's causing it will fall off .

I seem to recall a muffler issue being where this whole thing started over on AS. Hmmm....

 

[Al Smith]

Well some times questions arise obviously from the same interested person using different log in names depending on which site .Fact there are several on here right now . However on the site afore mentioned in passing I have no knowledge because I haven't accessed that site in over 10 years and unlikely ever to in the future .

 

[PogoInTheWoods]

Point was, check for a loose muffler or muffler innards making the mystery noise...