Learn how to fix any pull starter in 7 minutes.
My favorite starter cord:
Stens #4.5 https://amzn.to/3x2KcWj
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Here's all my very favorite tips that I use every time I rewind or replace a cord on a pull starter. If you check all these common failure points, you'll be almost guaranteed success, even if you barely have any idea what you're doing!
Here's a better breakdown of pull cord sizes (from rcpw.com):
#3 (3/32" Diameter) and #3-1/2 (7/64" Diameter) rope is used on most trimmers and small 2-cycle engines.
#4 (1/8" Diameter) and #4-1/2 (9/64" Diameter) rope is used on most chain saws and larger 2-cycle engines.
#4-1/2 (9/64" Diameter), #5 (5/32" Diameter) and #5-1/2 (11/64" Diameter) rope is used on most 4-cycle mower small engines.
#6 (3/16" Diameter) and #7 (7/32" Diameter) rope is used on most larger 4-cycle engines.