Author Topic: Connecting rod bolts on McCulloch 125 SP  (Read 2375 times)

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Offline Eccentric

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Re: Connecting rod bolts on McCulloch 125 SP
« Reply #30 on: December 30, 2014, 02:02:49 am »
In the 1950's and early 1960's, Mac had a leg up on everybody else in porting designs and also die casting capability.  Homelite caught up pretty fast though (and was ahead of Mac in the use of the Tillotson HL and HS carbs).  They both made some awesome big timber saws, as well as some market leading small saws through the 1960's.  Homelites and Macs were both real popular all along the coast here.  I've never seen a Lombard that was sold in this area.

I now have two Lombards (both arrived this year).  A Comango and a Cyclone.  Both 68cc.  The Cyclone has a full-wrap handlebar which is cool. They're both basically Homelite XL-12 designs with miner design differences.  Neat saws. 

I just have them for fun/nostalgia and GTG's.  The Comango was brought down from BC to the PNW GTG this year by a friend.  Only asked for a bit of beer money in return.  Another friend sent the Cyclone down from Canada to me.  He didn't ask for much in trade either.

Also have a couple NOS Lombard patches (sent to me by yet another friend) that I'll have my wife sew onto ball caps for wear at GTG's.  Got a very nice Poulan patch (thanks Roger..................yet another friend) that will go on another cap.  Now I need some Homelite and Mac patches.  I can get a Husky cap at the dealer....

Offline 660magnum

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Re: Connecting rod bolts on McCulloch 125 SP
« Reply #31 on: December 30, 2014, 03:17:40 am »
My exposure early on was with my uncle who was in the sawmill business . . .

In the early 50's big pine (SYP) and hardwood timber was the rural scene. Crosscut two man hand saws were still very common in 1950. That was soon to change . . .

Most of my commercial exposure to chainsaws in the mid 50's and very early 60's was loblolly pine pulpwood oriented. So I was not around so much of the real big saws. The short pulp wood industry seemed to thrive in the later 50's and early 60's. Then began to transition to the full length small pine whereas a small amount of pine lumber was rendered for the treated wood business and the rest of the tree was chipped for paper and and eventually transitioned into the OSB plywood business. Major chip buyers were International Paper and Georgia-Pacific. The wood harvester/processor developed in this industry to the eventual demise of the hand held commercial chainsaw business. My next door neighbor was a regional representative for Lombard and serviced saws on the week ends.

Though I was around several of the 47 to 82 power products powered Lombards. There were some Homelite powered Lombards in the late 50's also.

Every Lombard & Homelite I was around was the old bunched up style with the cylinder vertical or slanted forward and had a bow bar (like a 5 series).

The tear down, porting, and rebuilds of Macs experience was with MC10 & MC20 Kart engines.
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Offline Eccentric

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Re: Connecting rod bolts on McCulloch 125 SP
« Reply #32 on: December 30, 2014, 03:28:58 am »
Very interesting Jim.

Offline super44

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Re: Connecting rod bolts on McCulloch 125 SP
« Reply #33 on: December 30, 2014, 09:31:10 am »
According to the shop manual 105-110 inch pounds,oiled bolt .However according to SAE on grade 8 bolts 10-32 it's 62 inch pounds.They might be a higher grade than 8 though .

It's a hard bolt going into a sintered metal rod so the higher torque might apply .Trivia:the "**** rod " was developed by McCulloch motors and is standard practice today on most automotive engines .

If the gasket is a little stiff sealant is okay .If it's supple,in my opinion it doesn't need sealant .

Thanks!

Offline Al Smith

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Re: Connecting rod bolts on McCulloch 125 SP
« Reply #34 on: December 30, 2014, 08:33:35 pm »
Just a word .On those 68 cc Lombards they are known seal leakers .Both my two have bad seals and I have three that were given to me in boxes that fried themselves .

As it was told to me from an old McCulloch,Homelite and Lombard dealer there are several of the xl-12 design made or sold by various manufacturers .Ranging from smaller than the xl-12 up to 80 some cc .Supposedly of one design engineers brain storm but altered slightly as to not have patent infringement .If that's a true statement or not I really can't say .Might just be an urban legend.

Offline Gypo Logger

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Re: Connecting rod bolts on McCulloch 125 SP
« Reply #35 on: December 30, 2014, 11:07:08 pm »
Hi Al, long time no see. How you been and how many 125's do you have now?
 Btw, I wore out my hoof rasp! Lol
John

Offline Eccentric

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Re: Connecting rod bolts on McCulloch 125 SP
« Reply #36 on: December 31, 2014, 07:01:36 pm »
Just a word .On those 68 cc Lombards they are known seal leakers .Both my two have bad seals and I have three that were given to me in boxes that fried themselves .

As it was told to me from an old McCulloch,Homelite and Lombard dealer there are several of the xl-12 design made or sold by various manufacturers .Ranging from smaller than the xl-12 up to 80 some cc .Supposedly of one design engineers brain storm but altered slightly as to not have patent infringement .If that's a true statement or not I really can't say .Might just be an urban legion

There were many "XL-12ish" saws built by Lombard, Poulan, Remington, and Pioneer (and maybe others I cannot recall).  Most were around 54-60cc.  Remington made 'em as small as 46cc (SL-9) and as big as 94cc or so (PL-7A). 

I have a Wards 2.8 Power Kraft branded SL-9 with a 12" RN.  Some day I'll go through it and get it running.

I ran a PL-7A in 2013 at the PNW GTG.  Didn't look any bigger than a Homelite SXL-925, but sure felt heavier.  Lots of torque.  Cool saw.

http://www.acresinternet.com/cscc.nsf/ed1d619968136da688256af40002b8f7/26f6a3afa3e8d29b88256d31005097e2?OpenDocument

http://www.acresinternet.com/cscc.nsf/ed1d619968136da688256af40002b8f7/4371a25b3a4a594d88256d3500210ef3?OpenDocument

I have a 58cc Pioneer 11-60 that just needs a fuel system rehab.  Neat saw, with a cool chromed dual-outlet muffler and a 20" RN bar.

http://www.acresinternet.com/cscc.nsf/ed1d619968136da688256af40002b8f7/a08b5ebccf74ed1688256b0000114773?OpenDocument

I ran a 77cc Pioneer 3270S at the 2014 GTG.  One of the strongest saws in that class that I've ran.

http://www.acresinternet.com/cscc.nsf/ed1d619968136da688256af40002b8f7/1656b696cc23b50388256b000015ff9e?OpenDocument

I'm not surprised that the Lombards were seal eaters.  Seen plenty of XL-12 series saws with bad seals.  Most died because the owners 'tuned out' the air leaks as long as they could..............until the leaks got bad enough to roach the pistons.  I'll put new seals in my two 68cc Lombards before I run them much.  Cheap insurance.  They're not going to get used a whole lot in any case....

Offline Al Smith

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Re: Connecting rod bolts on McCulloch 125 SP
« Reply #37 on: January 02, 2015, 09:33:27 pm »
Hi Al, long time no see. How you been and how many 125's do you have now?
 Btw, I wore out my hoof rasp! Lol
John
Just two John .As far as rasps I haven't laid the die grinder to a saw cylinder in a while myself .I really did do one with a file and it worked .Kind of a pain in the butt though .

Offline super44

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Re: Connecting rod bolts on McCulloch 125 SP
« Reply #38 on: January 04, 2015, 11:17:05 am »
Anyone out there ever put electronic ignition in a 125?

Offline Al Smith

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Re: Connecting rod bolts on McCulloch 125 SP
« Reply #39 on: January 04, 2015, 10:19:08 pm »
One of mine had a solid state igniter with an off set  key to advance the spark .The modual went bad but as luck would have it the points were still there .

I prefer points myself .Fact when I hooked the points back up I kept the off set key and mavericed the points to jack the timing a couple of degrees from the stock 26 advance to maybe 29 advance .It improved it slightly .It starts right up but you don't want to patty cake it .Pull it over with gusto because 123 CC coming back on you can about jerk your arm off .

 

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