got xp1000, mac 250 today

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shalenkur

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found these old dogs buried in my father-in-law's pawn shop today. :D they both started, to my amazement--been sitting about ten years. neither one has any power, but they both run well, good compression. probably need carb-kits? :D that old mac is super heavy . . .
 
I think the homelite will turn out to be better for it's lighter weight and larger displacement. The mac is neat though because it has a cast-iron sleeve, maybe a more durable saw. Why do you guys think they only have 18" bars--seems redundant on a saw so
large???

has anyone ever upped the compression on an xp1000?
I think one could just mill the bottom of the jug . . .


later
 
that would bring up your compression but it will lower your ports and change port timing
 
Mac 250

If you want to make that old 250 cut,here's some cheap tips.Pull that .404 bar,and sprocket off,and replace with a 3/8" 8 tooth,and run .050 chain.Set the points at about 6 thou,and move the coil into about 6 to 8 thou.air gap.Shove it in opposite direction of rotation,as far as possible.If it kicks like a mule,open up the points a tad.If you have a lot of run out on the flywheel,you won't be able to set the air gap that tight,check it.It won't make it run like an 066,but will improve it a bit.Works for me.It will,in fact pull a longer bar than that 18".I have one with an 18",a 24" and a bow.
 
hey Al--

are sprockets and bars readily available for these saws? could you point me in the right direction?

thanks for the tips, I'll be trying them out and will let you know.


love that free horsepower . . .
 
Mac bars

1 of my 250 s has been changed to a rim drive,I don't know the Oregon number.I don't know if Baileys or one of As suppliers carry these or not,it my take an e-mail,or phone call.If not,MSC,carrys the spur sprockets.As far as the bars,it would take a large mount McCulloch [3/8" studs],I don't think anybody makes them anymore.You could use The one you have[I assume it is a hardnose],most likely .063 slot,but could be .058.I have used Stihl mount bars,and used bushings to take up the slack from the studs to the 12 or so mm slot in the bar.This calls for modifying the oil hole and bar adjusting hole.I 've been able to find a few,on e-bay.A few of the a-site members,have lots of them.I try and stay with the bar style.of the time period,because of the fact I restore them.Case in point is the bar in the picture,which is an Oregon"armor tip"and it still had the decals on it ,when I got it,but this is just a personal preference.In one of Weimedog's posts,he tells of a saw shop in Ny,that has oodles of nos parts for these saws,check it out.Good luck
 
To Shalenkur:

Hi the name of the saw shop is: Bob's Lawnmower Repair, owned by Robert V. Johnson, 7632 State Hwy 7, Maryland, NY 12116-3201. His phone # is: 607-638-9297. I've talked to the fellow and if he doesn't have the part will steer you to someone who might. Hope this helps, take care. Lewis.
 
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