McCulloch Chainsaw Specifications for Model 7-10

A favorite of chain saw collectors, the 7-10 model was fabricated by California-based McCulloch Motors from the late 1960s and early 1970s. The fundamental 7-10 model was superseded by the 7-10A at the end of the production run, and the model was discontinued in 1971. By today’s standards, the 7-10 is a beefy saw, capable of doing large jobs with lots of power to spare. It does, however, reveal its age, as it lacks most of the features that produce modern saws simpler to use.


The 7-10 is powered with a 70.5-cc two-cycle engine using one cylinder. The aluminum cylinder features a 2-inch bore and 1.375-inch piston stroke. During the course of manufacturing, the 7-10 was armed with one of three distinct carburetors: a Zama, Tillotson HS-165A, or Walbro SDC58. The engine is air-cooled and, like all two-cycle motors, requires an oil-and-gas mixture instead of pure gas fuel. It has a centrifugal clutch and an automatic recoil starter.

Guide Bar and Chain

The standard guide bar length for the 7-10 is 16 inches, but the saw is able to accept and drive guide bars up to 28 inches. It came armed with a McCulloch-branded chain using a 3/8-inch pitch.


The”A” at the 7-10A model designation stands for automatic, meaning that the 7-10A has a automatic oil pump with a manual fix. It also has a manual chain brake. Aside from that, the 7-10 is a workhorse, using a standard recoil starting system. It lacks the technology that reduce engine emissions and also make contemporary saws more fuel efficient, and it doesn’t offer you luxurious add-ons, like reduced-effort beginning systems or tool-free chain modification mechanics.

Comparison With Current Models

In comparison to versions that are current, the 7-10 is a creature. The maker didn’t officially rate the energy output of this saw’s engine, but it has no problem powering a huge 28-inch manual bar. In contrast, McCulloch’s current top-of-the-line CS 450 Elite saw has a 45.7-cc engine that is able to handle bars between 13 and 18 inches. The 7-10 tips the scales such as a monster, though; its powerhead alone, minus bar and string, weighs 15.6 lbs, while the CS 450 Elite weighs just 11.7 lbs.

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