Partner K650 Starter Spring New Aftermarket Part 506 25 89-01 (Bin 536) Stihl Fits the Following Models: McCulloch

Fits the Following Models: McCulloch Mac 10-10 Auto and many others

Look for numbers and the word Zama stamped on your carb

Part: flywheel with starter pawl

Part: walbro HDC54 carburetor

Partner K650 Starter Spring New Aftermarket Part 506 25 89-01 (Bin 536) Stihl Fits the Following Models: McCullochStarter Spring 506 25 89 01, 258901 Fits Partner K 650 cuttoff saw, and many others. aftermarket. If the plastic cassette holder that comes with this spring is removed and discarded, you can make the spring work on older partner chainsaws 55cc, 65cc, 70cc, 85cc, and 100cc. Replaces 295108, 505 29 51 08 (minus the plastic cassette).