Chainsaw Repair

Yes and no .They interchange but the flat back only has a thumb type primer button where as it's a lock down choke button on the Tillotson .Also the throttle linkage is probabley a tad different between the two .If you are changing one to another from two complete saws it shouldn't be a problem because all the stuff should be there .

Now some of them like the 44 series that used levers instead of buttons I'm not exactly certain of what it would take .Nothing that couldn't  be figured out though most likely .

No their not both Flatbacks one i think has the round shaped housing for the fuel pump and diaphram the other a squarer type housing with a primer both carb types are OK providing you know what your doing.

The flatback has the square type of housing

McBob