Quote Originally Posted by SONIC View Post
Break-in is a pain point in every engine centric sport.

My opinion is that it's a good idea. Probably not necessary but it certainly can't hurt.
More important than the break-in IMO is getting an oil change in pretty early. 20ish hours or less if you've been pushing it. Engines wear in, and as soon as that's done you want to get as much of that shit out of the engine as possible.

I've rebuilt lots of engines and have babied some and treated some like garbage, I can't tell a difference but IMO it never hurts to be careful out of the gate. It's a few dollars in oil for peace of mind.
we follow this line of thought but if you ready any manual your truck that you tow the boat with has a break in period as well and how many dealers take you for a demo and part of that demo is onramp to freeway speed. per gmc in my truck manual that's a no no.
It's my understanding that the ecm stores rpm's and hours spent at that rpm so if your engine grenades at 50 hours they won't have a clue how those first 10-20 were spent.

I watched a documentary many years ago on honda and the plant in japan that churns out cbr's. right after assembly they roll onto a dyno and run the rpm's up to 17k to ensure it's delivering the stated HP. my guess is rings have landed at that point.

sonic calls out first oil change and for us that's the most important...

in the end to each their own but doubt your warranty will be void from not following. our first boat was the '06 supra photo boat. it had 90hrs but was sold as "new". I would bet money that it was never broke in properly and it ran great for 6 years for us...