How to fix/ replace Moster 185 pull start $19 and spark plugs $3

It’s cheaper to replace the pull start than it is to buy parts to fix it… This is what I found on Amazon that will fit the moster 185 pull start
And get a four pack of spark plugs for only $9

4.1 out of 5 stars 16 Reviews
Affordable Parts New Recoil Starter Replace for Tecumseh 590420A
https://amzn.to/3a6cAWN

Replacement spark plugs
4.8 out of 5 stars
NGK 5722 BR9ES Standard Spark Plug, Pack of 4NGK 5722 BR9ES Standard Spark Plug, Pack of 4
https://amzn.to/2I4Byd7