Author Topic: mac 1-40 and 250 bar sizes  (Read 1368 times)

0 Members and 0 Guests are viewing this topic.

Offline Eccentric

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2110
  • Karma: 217
  • Magnesium and Iron.
  • Location: Northern California.
Re: mac 1-40 and 250 bar sizes
« on: February 02, 2014, 03:07:50 pm »
Jerry you can also use D096/D196/UXL Homelite XL-mount bars (for an XL-12, SXL-925, etc) on these saws if you use the McCulloch "slim line" bar plate spacers (originally sold for large frame Macs for use with 'slim line' McCulloch bars).  You also must make sure that there is an oiler passage from the adjuster hole to the chain groove.  Some of these bars have that provision...........and others require you to modify the bar. 

You also must use the 'late' style bar plates that look like enlarged 10-series McCulloch bar plates (as outlined above).  That's in addition to the 'slim line' plates.  On the saw you start with the inner bar plate, then one 'slim line' plate, then the bar, then the other 'slim line' plate, and then the outer bar plate and the clutch cover.  Those 'slim line' plates keep the chain rivets from digging into things.  There is a possibility that the chain DL count will be different than what it was for the Homelite XL-mount bar when it's on a Homelite saw.

The 'slim line' McCulloch bars were intended by McCulloch to be used on either the 10-series or large frame McCulloch saws.  When used on the large frame saws, they required the 'slim line' bar spacer plates (along with the original late style bar plates).  When use on the 10-series Macs, no 'slim line' plates were needed.................but stud spacers were.  The stud spacers were sold with the bars.  Still see them on ebay sometimes.  The spacers for the 10-series saws are the 'coil spring' type (needed to space up from the 5/16" 10-series studs to the 3/8" slot in the bar).  An 'S' type Homelite/Poulan stud spacer can also be used.


Here's Bryce Stott's listing for the 'slim line' plates.  Rob (Jockeydeuce) also had some of these listed on ebay recently...

http://www.ebay.com/itm/MCCULLOCH-BAR-SPACER-GUIDE-PLATES-125-105-STBX292-/360400117813?pt=LH_DefaultDomain_0&hash=item53e9856035
-Aaron

For older saws:
Tune the H side so that it 4-strokes (burbles) at WOT unloaded and just cleans up when under load.
When you lift cutting load, the saw should immediately revert to 4-stroking.  Fine tune the transition point for the wood you're cutting.

 

Related Topics

  Subject / Started by Replies Last post
1 Replies
274 Views
Last post March 27, 2012, 01:11:06 pm
by Cut4fun .
24 Replies
1443 Views
Last post October 25, 2012, 08:45:50 am
by Al Smith
9 Replies
464 Views
Last post January 24, 2014, 01:18:49 pm
by Cut4fun .
2 Replies
116 Views
Last post April 14, 2015, 08:48:14 pm
by deereguy
4 Replies
203 Views
Last post March 16, 2017, 04:37:50 am
by bulletpruf
0 Replies
84 Views
Last post February 05, 2019, 08:18:46 pm
by Cut4fun .