hello fellas,

I have a 496ho with 85hrs on it. it is used in salt water. My question is, when is it time to change the manifold and/ risers? is there a calendar and time limit like with other components? and should both the manifold and riser be changed or only one of the two?

Thanks

As long as you are flushing them after each use, you should get at least 5-8 years out of them.