I dropped my boat off Saturday at the Marine to get checked out due to a new "tick". Everything was good over the 4th wknd. Just taking a quick look, they think it may be a lifter or manifold leak. I didn't notice any loss of power or oil pressure. The temp stayed right under 150deg as usual. The 454 has 553hrs. I'm sitting here biting my nails on what this is going to get me for. They are closed today so hopefully I'll know more tomorrow. If it is the lifters, should have anything replaced or checked out while they have the topside of the motor opened up? Should have them replace all the lifter springs?

pdm

could be either or, the could definetly have a llifter tick, boat sat alot

My 454 is doing the same thing but for less than 15 upon start upseconds may be a sticky lifter. If it lasts longer than that could be a problem.

Let us know on the out come. Good luck