I bought my boat with 275hrs on the I/O @8yrs old. The first 4mo I added some hours to the main because of no kicker. After adding kicker, life has extended my main. Had my boat now 9yrs and main is only up to 520hrs. Unfortunately the kicker gets all of the abuse but thats its job. I'm planning an upgrade of my kicker later this year with the purchase of a new kicker that I don't have to pull start. Starter kits for mine are NLA or obsolete as age always lets you know your outdated. With my new kicker I will add an hour meter, very simple to wire in the system. That is something we tend to lose track of since hour an meter is not installed to monitor total hrs when using. Its easy to spend 4 or 5 days out on a trip and not think about running hours while fishing. I like the idea myself of fuel injection but retirement means what I can afford too.