598 longevity question
 

So I’m looking at a boat that has a fresh 598 in it. Making around 800hp. What’s the life expectancy? How often for a refresh? How much for a refresh? What’s included? What kind of maintenance to prolong as long as possible? It’s a single application on a 5700lb boat. Plan on running it at cruise speeds majorly of the time, per the wife.

No way to say for sure. I would say leak down tests every year and valve train refresh at 150 hours and go from there.

You need to know the details on the pieces and parts. What block and mains, crank, rods, fasteners, etc. Cam lobe profiles are most critical as valve train is usually the first to wear out. Aluminum rockers or stainless Pro Magnum, spring steel material. I have also seen some valve guides wear prematurely due to defective materials from a big name brand.

Your wife tells you how to run the boat ?

Could be five minutes or five hundred hours depending on who built it and with what parts. Since it’s “freshly rebuilt” the builder of the engine should be able to give you the info that you’re looking for. If there’s no paper trail on the rebuild then the engine is worth just a percentage of the parts at best.

thankfully he has a paper trail. He is I. The same state so I’m going to get the builders info.

she is new to boats. First speed limit was 50, went 65 and she didn’t notice. I think it’s just a fear thing. Loud boat etc. I’m moving up in size so it handles these nasty waters better. That’s most of the issue. She has a bad neck and the lay one was beating her up

I get it , just tell her you need to stay out of the peak TQ range which is usually cruise, that`s when $hit happens. You need run the boat as close to WOT as possible so that you don`t hurt the engine:drink:

When my wife starts to get scared I start hearing dan Dan DAn DAN! so I turn off her headset :silenced::D

well I’m hoping the move up from a 24’ Pulsare to a 28’ Pantera will help. And yes, I get the same thing, except, Kevin...Ka..Ka..Kevin

My wife talks a good story, we won't go fast etc. But once we get going she's the one giving me the wave to drop the hammer. We were cruising along about 65 and another boat passed us and she gave me the look like are you going to let that happen. Of course her daily driver is a 600+ hp Callaway Corvette.